Explanation:
Steroid hormones are a gathering of hormones, got from cholesterol, from the class of mixes known as steroids. They are emitted by the adrenal cortex, testicles and ovaries, and by the placenta during pregnancy. Based on their receptors, steroid hormones have been ordered into five gatherings: glucocorticoids, mineralocorticoids, androgens, oestrogens and progestogens. Puberty is the point at which young ladies' bodies and psyches develop and they develop into young ladies. This typically begins when a young lady is around 10 years of age. Some of the time, however, an a lot more youthful young lady begins to give the indications of puberty. This is called intelligent (pre-KOH-shuss), or early adolescence (PU-ber-ty).Hence the right answer is option 2 Premature puberty in girls in the area".A researcher was studying mutations in bacteria. He found that certain bacteria had changes in their DNA that allowed them to be resistant to antibiotics. This research is an example of 1._______The mutation will lead to 2.________.
1.
A.Embryology
B. Evolution Genetics
C.Comparative Anatomy
2.
A. All the bacteria becoming resistant to the specific Antibiotics
B. The Bacteria becoming nonresistant to specific Antibiotics
C. Less Bacteria becoming resistant to the specific Antibiotics
Explanation:
Evolution genetics is a field of science, which includes the study of genetic variations that lead to evolutionary changes in organisms As some bacteria had changed their DNA that led to the development of antibiotic resistance in themDue to antibiotic resistance, certain bacteria, in which changes in DNA take place, become resistant against some type of antibiotics and those antibiotics are no longer effective to prevent or kill them Hence, the right answer is option 1 B and 2 C " evolution Genetics & less bacteria becoming resistant to the specific antibiotics"Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences wil prokaryotic genome.If she moves the promoter for the lac operon to the region between the beta galactosidase (lacz) gene and the permease (lacy) gene, which of the following would be likely? A) RNA polymerase will no longer transcribe permease. B) The cell will continue to metabolize but more slowly. C) The operon will no longer be inducible. D) Beta galactosidase will not be produced. E) The three genes will be expressed normally.
Answer:
D) Beta galactosidase will not be produced.
Explanation:
Promoter is necessary to start the transcription of the structural gene. The position of promoter is important because the gene which is downstream to promoter will be transcribed and the gene upstream to the promoter will not be transcribed.
Lac operon has three structural gene lacZ, lacY, and lacA. Lac Z codes for β galactosidase, lac Z codes for permease and Lac A codes for transacetylase. So if promoter for the lac operon moves between the beta-galactosidase (lacz) gene and the permease (lacy) gene, then the beta-galactosidase gene will not be produced because it is places upstreamed to the promoter.
What is not evidence that the charophytes are the closest taxon to plants?
Answer:
the presence of chloroplasts
Explanation:
Here is the complete question:.
Which of the following is not evidence that charophytes are the closest algal relatives of plants?
A)similar sperm structure
B)genetic similarities in chloroplasts
C)similarities in cell wall formation during cell division
D)the presence of chloroplasts
E)similarities in proteins that synthesize cellulose
And the answer is
D)the presence of chloroplasts
The hormone epinephrine binds to ß adrenergic receptors on smooth muscle cells of the bronchioles, causing them to dilate (increase in diameter). Thyroid hormone is essential for the synthesis of ß adrenergic receptors; therefore, in the absence of thyroid hormone, epinephrine cannot trigger bronchodilation. This concept if known as __________.
Answer:
The correct answer is "permissiveness".
Explanation:
The missing options of the question are:
permissiveness
synergistic effect
antagonism
additive effect
The correct answer is "permissiveness",
In biology, a permissive effect is defined as the effect that one hormone has enabling that a second hormone to exert its biological activity. Thyroid hormone has a permissive effect on the hormone epinephrine, by synthesizing ß adrenergic receptors, it enables the hormone epinephrine binds to them and cause the cells of the bronchioles to dilate.
Answer:
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Explanation:
A structural gene is Choose one: A. a string of nucleotides that can be decoded by an enzyme to produce a protein. B. an organism’s entire genetic complement of DNA. C. a string of nucleotides that can be used as a template to produce an RNA that codes for a protein. D. an enzyme involved in the conversion of DNA into RNA.'
Answer:
C. a string of nucleotides that can be used as a template to produce a RNA that codes for a protein.
Explanation:
A gene is a specific sequence of DNA containing genetic information required to make a specific protien and is a string of nucleotides (DNA in cells) that can be used as a template to produce a RNA (by transcription) that codes for a protein. The produced RNA might be the end product (for example some transfer RNA's) or might be further translated into a protein. An organism's entire complement of DNA is its genome.
Final answer:
A structural gene is a sequence of DNA that acts as a template for producing an RNA molecule which is then translated into a protein (option C). During transcription, this gene is copied into mRNA which encodes for the protein.
Explanation:
A structural gene is C. a string of nucleotides that can be used as a template to produce an RNA that codes for a protein. In the process known as transcription, only one strand of the double-stranded DNA is copied into messenger RNA (mRNA). The mRNA then serves as a guide for assembling amino acids in the correct sequence to produce a protein. The strand of DNA that is used during transcription is referred to as the template strand, and the mRNA sequence is complementary to this strand. This transcription process is critical as it begins the pathway of converting genetic information from DNA to RNA, and ultimately to a functional protein.
What is a primary function of the active site of an enzyme?
In industry, microorganisms are often cultured in an environment where ideal conditions are maintained through continual nutrient provision and waste renewal. Such a system is called a _______.
Answer: Continuous Culture
Explanation:
In industry, a continuous culture is maintained by providing the nutrient on time and removing the waste materials on time so that the optimum conditions inside the medium is maintained.
It is done to minimize the efforts which is required when the preparation is done to prepare the nutrient and inoculate the bacterial species.
Then by the time the bacterial species starts growing and then the useful product is extracted. In order to save the time and efforts the nutrient is supplied and waste materials is removed along with the useful products.
What is a possible outcome of persistent geographical isolation of two populations?
Answer: Allopathic speciation could occur.
Explanation:
What should be done to correct positioning on an anteroposterior (AP) elbow with lateral rotation, when the radial head is slightly superimposed over the proximal ulna on the first effort?
Explanation:
The elbow joint should be rotated laterally. This is because the elbow is basically a pivoted joint, however, it has the extraordinary capacity to turn the distal arm in pronation and supinationThese exceptional movements, alongside a wide scope of dynamic exertional powers, incline the elbow and its structures to critical wounds, especially with tedious movementsUnderstanding the life systems and the physical powers of development will help in diagnosisHence, the right answer is "elbow joint should be rotated laterally on an (AP), when the radial head is slightly superimposed over the proximal ulna on the first effort"
In many organisms, one set of chromosomes comes from the maternal parent, while the other set comes from the paternal parent. Similar chromosomes in these sets are said to be ________.
Answer: Homologous
Explanation:
Homologous pair of chromosomes are the pair of chromosome pair which are of same height, same length, same staining pattern, same centromere position for the genes with same corresponding loci.
In this pair of chromosome, one is inherited from the mother's body and the other is inherited from the father's body.
These pair of chromosomes are transferred from the parents to the children.
Final answer:
In sexually reproducing organisms, the similar chromosomes in a set that come from each parent are known as homologous chromosomes. They contain the same genes, although they may have different alleles. In humans, one set of chromosomes is inherited from each parent, including the sex chromosomes which determine the offspring's sex.
Explanation:
In sexually reproducing organisms, homologous chromosomes are similar chromosomes in a pair where one is inherited from the maternal parent and the other from the paternal parent. These chromosomes contain the same genes in the same order but may have different alleles. In humans, DNA is organized into 46 chromosomes, with one set of 23 coming from the mother (maternal chromosomes) and the other set from the father (paternal chromosomes). The 22 pairs of autosomal chromosomes have genes present at the same locations. The last pair, the sex chromosomes, determine the phenotypic sex of an individual with XX individuals typically developing into females and XY into males.
While cleaning the leaves from a sheltered flowerbed, I observed a small patch of brightly colored, yellow/orange stuff apparently growing on some rotting wood. Taking a sample to my lab, I discover that the stuff is alive and coenocytic (is comprised of a single mass of cytoplasm undivided by membranes and contains many nuclei). The organism that I have found is most likely ___.
Answer:
plasmodial slime mold
Explanation:
The organism that best fits this description is a plasmodial slime mold. They are a group of eukaryotic organisms that can either live singly or in colonies.
They are basically single celled organisms with several nuclei aggregating in a mass. When several flagellated cells fuse together, they yield a single cytoplasm with several nuclei. They feed on micro-organisms and are ubiquitous in nature.Due to physical constraints, maximizing one life history trait (e.g. height) often comes at the expense of another (e.g. longevity); the allocation between such desirable but incompatible traits is known as:__________a) life history
b) growth and development
c) trade offs
d) all of the above
Answer:
The correct answer is - option C.
Explanation:
Trade off is the allocation in which one trait or character is only achieve by the expense of the other character and traits of life history due to some type of natural phenomenon.
The example of such trade off is given in the question where one of the life history trait such as height come at stake of longevity, due to physical constraints.
Thus, the correct answer is - option C.
I'm stuck between the answers "A" and "B". Is the answer "B"?
What is the next phase of the carbon cycle for the carbon source labeled C?
Select one:
a. Cellular respiration
b. Photosynthesis
c. Fossil fuels
d. Decomposition
Answer:
The right answer is b. photosynthesis.
Explanation:
Atmospheric carbon is used by plants to make sugars.
Decomposition, fossil fuels and cellular respiration come afterwards.
In a population with two alleles, B and b, the allele frequency of b is 0.4. B is dominant to b. What is the frequency of individuals with the dominant phenotype if the population is in Hardy-Weinberg equilibrium
Answer:
The frequency of the number of individuals with the dominant phenotype is 0.84
Explanation:
in Hardy-Weinberg equilibrium equation, p & q are used to represent the frequency of alleles in a population.
Frequency = Total No of 1 allele / total alleles
if frequency of p allele = 0.6
therefore p + q = 1 ==> q = 0.4
To get these frequencies, square (p + q)
p² + 2pq + q² = 1
The proportion of individuals that are homozygous dominant for B allele is p²
P² = 0.6 x 0.6 = 0.36
The proportion of individuals that are heterozygous for B and b alleles is 2pq
2pq = 2 x 0.6 x 0.4 = 0.48
The frequency of number of individuals with dominant female type
= 0.36 + 0.48 = 0.84
Using the Hardy-Weinberg equilibrium, if the frequency of the b allele is 0.4 hence the frequency of the B allele is 0.6. The dominant phenotype (BB or Bb) frequency would be 0.84 or 84% of the population.
Explanation:The student's question is related to the topic of population genetics, specifically the use of the Hardy-Weinberg equilibrium to calculate allele and phenotype frequencies. The Hardy-Weinberg equilibrium predicts that the frequency of alleles in a population will remain constant over generations unless influence by certain factors such as mutation, selection, or genetic drift.
In this case, the frequency of the b allele is provided (0.4), meaning the frequency of the dominant B allele can be determined by subtracting the b allele frequency from 1 (as total frequency is always 1 in this model). Therefore, the frequency of the B allele is 0.6.
The frequency of individuals with the dominant phenotype (BB or Bb) can be calculated as p^2 +2pq where p refers to the frequency of the dominant allele B and q refers to the frequency of the recessive allele b, which gives 0.6^2 + 2*0.6*0.4 = 0.36 + 0.48 = 0.84. Therefore, 84% of individuals in the population would express the dominant phenotype if the population is in Hardy-Weinberg equilibrium.
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Two species of tree frogs occupy different elevations in the canopy of a rain forest. If these frogs with strikingly different patterns of coloration but similar patterns of activity are brought together, they can produce offspring that survive to adulthood and can then mate successfully with individuals of either species. What keeps these frogs recognizably distinct?
1. Lack of hybrid fertility
2. Temporal isolation
3. Mechanical isolation
4. Habitat Isolation
5. Lack of hybrid viability
Answer:
4. Habitat Isolation
Explanation:
Habitat isolation is a type of prezygotic reproductive barrier or isolation that occurs when two similar populations that can interbreed successfully are prevented from mating with each other as a result of being isolated by habitat. That is, they occupy different habitats. This is what keeps these frogs recognizably distinct.
"What is the life-threatening systemic condition that can develop when an infection, like an abscess with surrounding cellulitis, moves into the bloodstream?"
Answer:
kvhbehfrb
Explanation:
,wnr ekv
oldest fossils usually: _____.1. are found in the deepest strata 2. have the longest half-lives 3. are found in sediments formed during the Cenozoic era 4. contain more radioactive isotopes than younger fossils 5. are found above younger fossils
Answer:
Option (1)
Explanation:
According to the law of superposition, the rocks that are found at the bottom of an undisturbed sedimentary sequence are the oldest rocks as these layers are initially formed due to the process of deposition, sedimentation and lithification, and with progressive sedimentation, the rock layers that are formed at the the apex portion are the youngest rocks.
So, the fossils found in bottom rocks are the oldest fossils, and those fossils that are found in the top layer are considered to be the youngest fossils.
Thus, the oldest fossils are the ones that are found in the deepest strata.
Therefore, the correct answer is option (1).
The oldest fossils usually are found in the deepest strata. Therefore, option A is correct.
The principle of superposition, a fundamental concept in geology and paleontology, states that in undisturbed rock layers, the oldest rocks and fossils are located at the bottom, while younger ones are found towards the top. This is due to the sequential deposition of sedimentary layers over time.
As new sediment accumulates, older layers are buried deeper, resulting in older fossils being found in deeper strata. Therefore, the oldest fossils are typically discovered in the deepest layers of rock or sediment. Thus, option A is correct.
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The hormone that initiates the development of specialized cells in the ovaries of women and triggers androgen production by the testes of men is _____.
Answer:
luteinizing hormone.(LH).
Explanation:
Luteinizing hormone specially stimulates cells in the seminiferous tubules to particularly secrete testosterone, which has a role in sperm production and developing male secondary sex characteristics.
In an important experiment, radioactively labeled bacteriophages were allowed to infect bacteria. In the first trial, the phages contained radioactive DNA, and radioactivity was detected in the bacteria. Next, other phages containing radioactive protein were allowed to infect bacteria, and radioactivity was not detected in the bacteria. These experiments led to the conclusion that __________.
Answer:
In an important experiment, radioactively labeled bacteriophages were allowed to infect bacteria. In the first trial, the phages contained radioactive DNA, and radioactivity was detected in the bacteria. Next, other phages containing radioactive protein were allowed to infect bacteria, and radioactivity was not detected in the bacteria. These experiments led to the conclusion that genes of phage are made of DNA.
Explanation:
Bacteriophages are the viruses which infect the bacteria. They bind to the surface of bacteria and inject the inner core and genetic material in the bacteria.
As in the first trial, the phages contained radioactive DNA, and radioactivity was detected in bacteria, it clearly shows that genes of phage are made of DNA. While, on the other hand,other phages containing radioactive protein were allowed to infect bacteria, and radioactivity was not detected in the bacteria clearly indicating that protiens are not entering the bacteria.
Answer:
The correct answer is: the genetic material of the phage is DNA.
Explanation:
In the experiments performed, the phages from the first trial contained radioactive DNA, while the phages from the second trial contained radioactive protein. If radioactivity was only detected in the bacteria that was infected by the phages from the first trial, but not in the bacteria from the second trial, the only possible explanation is that the genes in the bacteriophages were made of DNA much like the genes in bacteria.
the process which causes potholes in roads is called ______ when it occurs under glacial ice
Answer:
Expansion and Contraction of underneath or base water
Explanation:
When ice lands on a road, it weakens the soil beneath the pavement, cement by expansion. The slight varying temperatures that leads to the combination of contraction and expansion affects road this leading to potholes on road.
Answer:EXPLANATYION
Explanation:
ITS EASY
Polydactylism is a dominant trait that results in extra fingers and toes in humans. A polydactyl man marries a woman with 10 fingers and toes. They have a child that has a normal number of digits. The phenotype of the man's father is unknown, but his mother has a normal phenotype. What are the genotypes of the married couple? .
Final answer:
The genotypes of the married couple could be either Polydactyl (PP) or Heterozygous (Pp) for the man, and Normal (pp) for the woman.
Explanation:
To determine the genotypes of the married couple, we need to consider the information given in the question. The condition of polydactylism is stated to be a dominant trait in humans. This means that individuals who have the gene for polydactylism will express the trait and have extra fingers and toes. Since the child of the couple has a normal number of digits, it indicates that they do not have the gene for polydactylism.
From this information, we can conclude that the woman with 10 fingers and toes does not have the polydactylism gene, as she would have expressed the trait if she did. The man, who has polydactylism, must have inherited the gene from one of his parents. However, the phenotype of his father is unknown, meaning we cannot determine his genotype with certainty. It is possible that the man's father does not have the gene for polydactylism, and the man inherited it from his mother.
Therefore, based on the given information, the possible genotypes of the married couple are:
Man: Polydactyl (PP) or Heterozygous (Pp)
Woman: Normal (pp)
why is the modification or change in an organ or tissue during the lifetime of an individual is not inherited?
Answer: It is because the organ change is acquired and not inherited
Explanation:
Genetics explains that only traits inherited from parents can also be passed down to offspring since they are carried in the genes. Hence, other traits acquired as a result of organisms trying to survive in an environment are acquired traits, and cannot be passed down to offspring.
Changes within an individual's lifetime such as those associated with lifestyle or environment are not usually inherited because they do not alter the DNA code that's passed onto offspring. The concept of inheriting such changes known as Lamarckian inheritance, has largely been invalidated. Mutations that occur naturally during DNA replication can add to genetic variance but they are unrelated to an individual's experiences.
Explanation:The reason that a modification or change in an organ or tissue during an individual's lifetime is not inherited is largely due to the nature of genetic inheritance and evolution. Traits and genetic characteristics are passed down from generation to generation through DNA which exists in every cell in an organism's body and is locked in at conception. Change during an individual's lifetime can occur in the form of epigenetic modifications which are changes in how genes are expressed or activated, not changes in the genetic code itself. Although these epigenetic changes can be influenced by the environment and can even have long-lasting effects on an individual, they are not transferred to offspring via sexual reproduction.
Lamarckian inheritance, which proposed the inheritance of acquired traits, such as strength gained from physical labor or knowledge from learning, has been largely disproven. DNA replication and mutation, which are responsible for transferring genetic traits from parents to offspring, can't be influenced by the experiences or lifestyle of an organism, aside from certain cases like DNA damage through exposure to toxins or radiation. Mutations can arise naturally during DNA replication and can add variations to a population's gene pool, but these changes don't reflect the experiences or changes an organism goes through in its lifetime. Instead, they are the result of random genetic changes.
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A number of mosquito populations today are resistant to specific insecticides, even though those insecticides were highly effective when they were first introduced. Biologists believe that insecticide resistance evolved in mosquitoes because A. a few mosquitoes were probably resistant to the insecticide before it was ever used. These survived and passed that trait on to their offspring. B. mosquitoes needed to develop insecticide resistance to survive after the insecticide was used. C. the presence of the insecticide caused some mosquitoes to develop resistance; they survived and passed the trait to their offspring. D. current mosquito populations are phenotypically variable and exhibit differential fitness in different environments. E. individual mosquitoes built up an immunity to an insecticide after being exposed to it.
Explanation:
Rehashed utilization of a similar class of pesticides to control a bug can cause unwanted changes in the genetic stock of a vermin prompting another type of counterfeit determination, pesticide opposition. At the point when a pesticide is first utilized, a little extent of the bug populace may endure introduction to the material because of their unmistakable hereditary cosmetics These people go along the qualities for protection from the people to come. Resulting employments of the pesticide increment the extent of less-helpless people in the populace. Through this procedure of choice, the populace step by step creates protection from the pesticide. Around the world, in excess of 500 types of bugs, bugs, and arachnids have built up some degree of pesticide oppositionHence, the right answer is option "A"Thyroid hormone is essential for the synthesis of β adrenergic receptors; therefore, in the absence of thyroid hormone, epinephrine cannot trigger bronchodilation. This concept is known as __________.
Explanation:
In endocrinology, tolerance is a biochemical wonder wherein the nearness of one hormone is required all together for another hormone to apply its full consequences for an objective cell. Hormones can communicate in lenient, synergistic, or hostile ways. glycoproteins,steroids, polypeptides and amines are the chemical classes of hormone.Permissive hormones are precursor to active hormones and are called as prohormones or prehormones.Fts proteins are essential for bacterial cell division because they __________.
a. are involved in peptidoglycan synthesis
b. are involved in the pulling apart the two copies of the chromosome c. are involved in the forming of the divisome
d. All of the listed responses are correct.
Answer:
c. are involved in the forming of the divisome
Explanation:
What is true regarding cultivation and isolation of animal viruses?
Explanation:
The true is isolation of Animal virusesInfections are usually developed in embryonated eggs Viruses can be effortlessly developed on a strong medlum, for example, supplement agar with no different creatures present Viruses that cause human illnesses can't be developed in research center creatures Viruses can be effectively developed in fluid culture with no different life forms. Infection Isolation. Infection disengagement normally is completed by tissue culture or culture in embryonated chicken eggs (ECEs).Virus recognizable proof from cell societies would then be able to be directed by techniques, for example, immuno fluorescence and immuno peroxidase examines utilizing BTV-explicit monoclonal antibodies.WILL BE MARKED AS BRAINLIEST
The ovaries and testes produce sex hormones in response to _____
a. moon cycles
b. posterior pituitary
c. the adrenal glands
d. follicle-stimulating hormone and luteinizing hormone
e. lipase
Answer:
Explanation:
option d
Answer:
The ovaries and testes produce sex hormones in response to follicle-stimulating hormone and luteinizing hormone
Explanation:
Follicle-stimulating hormone and luteinizing hormone, when both hormones are activated the testes and ovaries are prepared or alerted to produce sex hormones
Compare asexual and sexual reproduction. Place each sentence into the correct box. Amoeba reproduce by dividing into two cells. Cherry trees can be grown from cherry seeds. Pineapple plants can be grown from stem cuttings. Hydras reproduce by budding. Chickens reproduce by laying eggs. Asexual reproduction Sexual reproduction
Answer:
Sexual and asexual reproduction are the defined methods of progeny production.
Explanation:
The process that accounts for the production of the progeny from a single parent is called asexual reproduction. The process of gamete fusion and change in the chromosome number is absent in this process. Some of the well known approach of this process includes binary fission, vegetative propagation and budding.
It includes the following sentences.
Amoeba reproduce by dividing into two cells(via binary fission). Pineapple plants can be grown from stem cuttings.(Vegetative propagation) Hydras reproduce by budding.
The process is sexual reproduction is characterized by the presence of gamete fusion step. The phenotype differentiation illustrates the presence of sexual diamorphism in such organism. In the plant system the formation of seeds is a characteristic of sexual reproduction mainly via pollination.
It includes the following process
Chickens reproduce by laying eggs. Cherry trees can be grown from cherry seeds.Asexual reproduction involves new individuals produced from a single parent organism without gametes, while sexual reproduction involves fusion of gametes from two parent organisms. Amoeba dividing and hydras budding are examples of asexual reproduction, while chicken laying eggs, cherry trees growing from seeds, and pineapple plants growing from stem cuttings are examples of sexual reproduction.
Explanation:In asexual reproduction, new individuals are produced from a single parent organism without the involvement of gametes. An example of asexual reproduction is when an amoeba divides into two cells.
Sexual reproduction, on the other hand, involves the fusion of gametes from two parent organisms to produce offspring. Examples of sexual reproduction include cherry trees growing from seeds and chickens reproducing by laying eggs.
So, the correct comparison would be:
Asexual reproduction: Amoeba reproduces by dividing into two cells and hydras reproduce by budding.Sexual reproduction: Cherry trees can be grown from cherry seeds, pineapple plants can be grown from stem cuttings, and chickens reproduce by laying eggs.Learn more about reproduction here:https://brainly.com/question/2899858
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Animal hair is made of
a. amino acids.
b. rayon.
c. acetate.
d. polyvinyl chloride.
Answer: Option A) Amino acids
Explanation:
The animal hair has rich deposits of keratin, a protein that helps the hair stand erect, tough and rigid in its shaft.
And since protein are macromolecules made up of several units of amino acids, we can safely say animal hair is made of amino acids
Final answer:
Animal hair is made of proteins called keratins, which are formed by amino acids linked through peptide bonds; thus, the correct answer is a. amino acids.
Explanation:
Animal hair is primarily composed of proteins, which are naturally occurring polymers. These proteins, in the case of hair, are specifically known as keratins. Keratins are formed by amino acids that link together through peptide bonds in a process called a condensation reaction, where molecules of water (H₂O) are eliminated. Among the options provided, amino acids are the building blocks that, when bonded together, create the proteins that constitute animal hair. Thus, the correct answer to the question, 'Animal hair is made of,' is a. amino acids.
The threshold on a dose-response curve is the:_______.
a. point at which the dose of the drug causes maximal response.
b. lowest dose at which there is an observable effect of the drug.
c. safe effective dose of the drug.
d. therapeutic index of the drug.
Answer:
B. lowest dose at which there is an observable effect of the drug
Answer:
b. lowest dose at which there is an observable effect of the drug.
Explanation:
If an organism is exposed to a particular dose(concentration) of drug or chemical for a period of time, and one needs to measure the extent or degree of exposure from level of response of the organism to the dose,( to determine the potency, or adverse effect of the drug) the term used to describe this procedure is called dose-response relationship.
If it is possible to graph the the( log )dosage of the drug on( the x-axis) against the percentage response of the organism involved(on the y-axis), then it is possible to obtain a graphical representation of the magnitude of the response to the drug dosage in a Sigmoid curve shape. This representation is called dose-response curve.
Generally in most cases small doses of drugs do not produce toxic effects; however as dose increases, toxicity increases.However the minimum dose(drug concentration) at which toxicity first appears, that is where observable effects of the drug first noticed based on the response is called Threshold.