Answer:
-RNA molecule.
Explanation:
Reverse transcriptase or RT can be defined as an enzyme that synthesizes cDNA (complementary DNA) molecules by using RNA molecule as template. This process is known as reverse transcription.
Reverse transcriptase enzyme is found in many RNA viruses, prokaryotes and eukaryotes. Telomerase in an example of reverse transcriptase, which is found in eukaryotes and replicates ends of linear chromosomes.
Thus, the correct answer is 'RNA.'
help !!!!?!!;!!:!/!$,&:’xndmsnsnnd
Answer:
its D
Explanation:
the second one in the first half is correct but the its not in the second half. good luck.
Which layer of the skin contains the sebaceous glands?
Describe how you demonstrated muscle fatigue in the laboratory, and describe the changes within the muscle that may help to explain how fatigue is produced.
On which bone does External Acoustic Meatus occurs?
Answer:
External Acoustic Meatus occurs in the temporal bone
Explanation:
External Acoustic Meatus is also known as external auditory canal. This canal is circular in structure and contains cartilage, bones, ceruminous gland.
External Acoustic Meatus is located on the temporal bone. This bone is located on the the lateral side and the base of the skull. Four parts of temporal bone are mastoid, squamous, tympanic and petrous.
The sodium-potassium pump is also known as the sodium-potassium
a. ATP channel
b. ATPase
c. ATP synthase
d. channel
e. receptor
Answer: ATPase
Explanation: The sodium potassium pump is also known as ATPase.
This pump works by pumping potassium ions into the cell while pushing the sodium ions outside of the cell which is used to generate action potential across the cell membrane.
This pump performs active transport and the energy used for this process is derived from adenosine triphosphate. ATP is hydrolyzed and energy is energy is released which is used by this pump.
Hence, sodium potassium pump is known as sodium potassium ATPase.
Animal behavior is fully described as:A. necessary for survival B. necessary for reproduction C. an action in response to a stimulus. D. All of the above. E. A and B.
the answer is a a and b beacuse c is a dumb answer and i had this question before hope it helps !!!
Answer:
Animal behavior is fully described as
D - ALL OF THE ABOVE
The cells of the macula densa and the juxtaglomerular cells form the?
A) renal corpuscle
B) afferent arteriole
C) nephron loop (loop of Henle)
D) filtration membrane
E) juxtaglomerular complex
Answer:
E. juxtaglomerular complex
Explanation:
Macula densa cells are the columnar tubule cells. They are present in the wall of afferent arterioles. The modified fibers of smooth muscles present in the lining of the afferent arteriole are called juxtaglomerular cells.
The juxtaglomerular cells and macula densa cells together make the juxtaglomerular apparatus, also called juxtaglomerular complex. The function of the juxtaglomerular apparatus is to maintain the blood pressure of kidneys.
Answer:
The correct answer is E) juxtaglomerular complex
Explanation:
The smooth muscle cells of both the afferent and efferent arterioles are swollen and contain dark granules. These cells are called Juxtaglomerular cells. These cells secret Renin which convert angiotensinogen into angiotensin.
The epithelial cells of the distal convoluted tubules that comes in contact with the afferent and efferent arterioles are more dense than the other tubular cells and are collectively called muscula densa. The cells of the mascula densa may function as chemoreceptors; feeding information to the juxtaglomerular cells. The juxtaglomerular cells and macula densa together form juxtaglomerular complex.
Billy arrives in your clinic. His parents state Billy has become progressively weaker and does not like to run and play outside as he easily fatigues. Billy is diagnosed with a myopathy (muscle disease), and can not make adequate ATP through aerobic cellular respiration. You suspect that Billy's ____ are functioning abnormally and may be the cause of his fatigue and myopathy. SELECT ONE ANSWER.
a. Lysosomes
b. Golgi appratus
c. Mitochondria
d. Unable to determine based on information given
e. Nucleus
f. Rough Endoplasmic Reticulum
Answer:
c. Mitochondria
Explanation:
Mitochondria are the double membrane-bound structures and are the site for aerobic cellular respiration. The process of aerobic cellular respiration produces a large amount of ATPs which are used by cells for other functions.
As per given information, Billy is becoming weaker and experiences fatigue due to lack of ATP through aerobic cellular respiration, his mitochondria in his muscle cells may not be functioning properly. lack of ATPs might be due to abnormal mitochondrial functioning.
The process by which gametes combined to form a zygote is called
a) parthenogenesis
b)mitosis
c)meiosis
d)fertilization
Answer:
D) fertilization
Explanation:
Fertilization is the name given to the fusion of male and female gametes. By themselves, female egg cells -- called ova -- and male sperm cells cannot grow and divide. However, once a sperm cell breaks through the egg cell membrane, the genetic material combines and the new organism begins to grow and develop as a living thing.
Which graph BEST shows the relationship of kinetic energy (solid line) to potential energy (dotted line) as a hawk dives downward toward its prey and then returns to its original position in the air?
A) A
B) B
C) C
D) D
Answer:
b
Explanation:
hope im right
The kinetic and potential energy of the hawk as it dives and returns to its original position are inversely related, with one increasing as the other decreases.
Explanation:The relationship of kinetic energy (represented by a solid line) to potential energy (represented by a dotted line) as a hawk dives towards its prey and then returns to its original position in the air would be best shown by a graph in which the kinetic energy increases as the potential energy decreases, and vice versa.
As the hawk dives (loses altitude), its potential energy (height) decreases, but its kinetic energy (speed) increases. When the hawk returns to its original position (regains altitude), its kinetic energy decreases while its potential energy increases. Therefore, the kinetic and potential energies should be inversely related on the graph.
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Which major tissue type functions to line and cover the body?
Answer:
epithelial tissue is the major tissue type functions to line up and cover the body
Everyone at one time or another has had a hard time getting to sleep. What are some ways to overcome insomnia without drugs?
Answer:
Explanation:
Insomnia is a condition in which a person experience lack of sleep. This involves conditions like difficulty in sleeping, waking in middle of the night, early morning awakening and non restful sleep.
Following are the ways to overcome insomnia without drugs.
1. A person should stick to regular sleeping habit.
2. Must not take much caffeine.
3. Must take proper diet specially dinner.
4. Must take bath before sleep.
5. Must make sure the sleeping environment is relaxing and suitable for sleeping.
6. Must use earplugs and eye mask if the environment is unsuitable like noise or unnecessary glare.
Which of the following might cause chronic hemorrhagic anemia?
A) Iron deficiency in the diet
B) Decreased EPO production
C) A bleeding ulcer
D) Sickle-cell anemia
Answer:
c
Explanation:
a bleeding ulcer - chronic hemorrhagic anemia depends a lot on the volume and speed of blood loss
Which one of the following is helpful in the treatment of early ejaculation?
a.
the use of dilators
b.
rear entry coitus
c.
erotic fantasy
d.
the squeeze technique
0.75 points
Answer: The squeeze technique.
Explanation:
The squeeze technique method is used to delay the early ejaculation that takes place at the time of coitus.
In this technique stimulation of penis is done until one feels ready for ejaculation.
The partner uses squeeze and pause technique at the end of the penis basically the at the point where the head joins the shaft, needs to be squeezed for several seconds until the urge to ejaculate passes.
Hence, the correct answer is "Option d "
All of the following are possible steps of scientific investigation except for ________. (a) the collection of scientific facts through observation and measurement (b) development of observations and experiments to test the hypotheses (c) the development of one or more working hypotheses or models to explain facts (d) assumption of conclusions without prior experimentation or observatio
Answer: (d) Assumption of conclusions without prior experimentation or observation.
Explanation:
A scientific investigation can be define as a fact finding inquiry which involves the detailed step by step procedure for answering the questions related to science. It involves steps like making an observation, creating a hypothesis, making a prediction depending upon the hypothesis, experimentation and analysis.
(d) Assumption of conclusions without prior experimentation or observation. is the correct option this is because of the fact that in a scientific investigation an assumption cannot be made. The assumption cannot lead to conclusive results and finding cannot be considered as reliable.
True of False: Hemoglobin releases the same amount of oxygen to all the tissues regardless of variations in their metabolic rate.
Answer: False
Explanation:
Hemoglobin can be defined as red protein that transports oxygen to various parts of the body according to its need.
It does not transports the same amount of oxygen to all the tissues. Some tissues of the body might require more more oxygen and some cells might require less amount of oxygen.
It depends on the state of activity. It transports more oxygen to the tissue that require it the most.
Example: The skeletal muscles of the body require more oxygen and it can be more than 80% .
Hence, the given statement is false and hemoglobin does not releases the same amount of oxygen to each and every tissue of the body.
The amount of oxygen hemoglobin releases varies with the metabolic rates of tissues. High metabolic activity tissues receive more oxygen—as more oxygen molecules dissociate from the hemoglobin—than the less active ones.
Explanation:The statement that Hemoglobin releases the same amount of oxygen to all the tissues regardless of variations in their metabolic rate is False. The oxygen-hemoglobin saturation/dissociation curve mechanisms regulate the amount of oxygen delivered to different tissues. Highly active tissues have high metabolic rates and therefore require more oxygen. Oxygen molecules dissociate from hemoglobin and enter these tissues due to the high difference in the partial pressure of oxygen between the tissues and the blood in the capillaries. Conversely, less active tissues like adipose tissues, which have lower metabolic rates, consume less oxygen. Hence, the partial pressure of oxygen within such tissues remains relatively high leading to fewer oxygen molecules dissociating from hemoglobin and entering the tissue interstitial fluid. Therefore, the amount of oxygen hemoglobin releases to tissues varies based on their metabolic rates.
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Which of the following has the longest duration. a. Earthquake b. drought c. Tornado d. Hurricane.
Answer:
drought
Explanation:
A drought is a natural disaster of below-average precipitation in a given region, resulting in prolonged shortages in the water supply, whether atmospheric, surface water or ground water. A drought can last for months or years
Drought has the longest duration of all.
What is drought and how long does it lasts?A drought is a period of time when an area or region receives less rain than usual. Reduced soil moisture or groundwater, reduced stream flow, agricultural damage, and a general water scarcity can all result from a lack of appropriate precipitation, whether rain or snow.A drought may go unnoticed for weeks, months, or even years before people notice. Droughts can end just as gradually as they began. Dry spells can extend up to ten years.Whereas, an earthquake lasts for typically about 10 to 30 seconds. Tornadoes rarely last longer than an hour. Hurricanes can last anywhere from three days to three weeks.
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Body systems are not completely independent they integrate and work together describe one example of the integration between body systems
Examples would be the sensory system and nervous system, circulatory system and respiratory system, circulatory system and digestive system.
Digestive system digests food and absorbs it into blood vessels surrounding the gastro intestinal tract. Nutrients are taken by blood to the heart and pumped to all organs for use.(circulatory systems function).
There are ___________ pair of true ribs.
Answer:
7
Explanation:
There are 12 total pairs of ribs. 1-7 are attached directly to the sternum by costal cartilages, making them true pairs. 8-10 are fake pairs, which means they're attached indirectly to the sternum. And 11 and 12 and free floating ribs, meaning they aren't attached.
Which of the following tissue types often provides a blood supply to the other three tissue types?
a. Connective
b. Nervous
c. Epithelial
d. Muscular
Answer:
d. Muscular
Explanation:
Muscular tissue is divided into three major groups: Skeletal Muscle Tissue (large majority of muscles), Heart Muscle Tissue (muscle of the heart) and Smooth Muscle (muscle that involves some organs and tissues).
The heart is an organ made up of muscular tissue. It is the contractile activity of this tissue that gives the heart its role as a blood-pumping organism. Cardiac muscular tissue usually provides a blood supply to other types of tissue.
How is PVR (pulmonary vascular resistance) determined?
Answer:
PVR is calculated by the formulae: [tex]\text{Mean PVR}=\frac{\text{mean PAP-PAOP}}{\text{CO}} \times80[/tex]
Explanation:
Pulmonary vascular resistance may be defined as the resistance to blood through the pulmonary circulation.
PVR can be determined by the following formula:
[tex]\text{Mean PVR}=\frac{\text{mean PAP-PAOP}}{\text{CO}} \times80[/tex]
Here, PAP is the pulmonary artery pressure, PAOP is pulmonary artery occlusion pressure and CO is cardiac output.
Which of the following is a muscle for chewing (mastication)?
a. sternohyoid
b. orbicularis oris
c. scalenes
d. temporalis
Answer:
The muscles of the jaw consist of three muscles the Temporalis, Masseter and Pterygoid Muscles which work together to move the mandible at the Temporomandibular Joint.
Explanation:
Final answer:
The muscle responsible for chewing, among the given options, is the temporalis. The masseter is another major muscle for mastication. The sternohyoid, orbicularis oris, and scalenes have other functions like swallowing, moving lips, and assisting neck movement respectively.
Explanation:
Among the options provided, the temporalis muscle is the one that is responsible for chewing, also known as mastication. It is one of the chief muscles of mastication and is located in the temple. The temporalis muscle is attached to the lower jaw and when it contracts, it assists in closing the mouth by moving the mandible upward and backward.
In contrast to the temporalis, the masseter is another major muscle used for chewing because it elevates the mandible to close the mouth. This strong muscle is found in the cheek and plays a vital role in mastication. Both the temporalis and the masseter work together to exert the pressure necessary to bite and chew food before swallowing.
Children's long bones have growth plates called?
Answer:
The growth plate, also known as the epiphyseal plate
Explanation:
or physis, is the area of growing tissue near the ends of the long bones in children and adolescents. Each long bone has at least two growth plates; one at each end
The principle action of the anaerobic phase of glycolysis (fast glycolysis) is to:
a. degrade glucose or glycogen into pyruvic acid or lactic acid and produce some ATP
b. form NADH and FADH
c. degrade lactic acid to pyruvic acid
d. generate high-energy compounds such as GTP
Answer:
glucose to ATP and NADH - an electron carrier
40) When blood pressure is normal, the receptors in arterial walls fire action potentialsA) continuously.B) very seldom
Answer:
continuously
Explanation:
The Brain stem area of the brain includes following 3 structures: ___________ for eye movement/walking; and ___________ to help regulate respiration and the _________________ that regulates heartbeat and breathing.
Answer:
The Brain stem area of the brain includes following 3 structures: mid brain for eye movement/walking; and pons to help regulate respiration and the medulla oblongata that regulates heartbeat and breathing.
Explanation:
The superior colliculi are the nuclei present in white matter of the midbrain and serve as visual reflex centers. These nuclei are involved in the coordination of eye movement when we follow a moving object.
The dopamine-releasing neurons present in the substantia nigra of midbrain regulate the body movement.
The cardiac center and respiration center (chemoreceptors) present in medulla regulate the heart rate and breathing rate respectively.
The pneumotaxic center of the pons is a nucleus involved in the regulation of inspiration and expiration during respiration and thereby regulate the rate of respiration.
Why are primates social in the short term? a. to share food sources b. to increase female fecundity in dominant females only c. to establish social relationships to prevent attacks from predators d. to increase interaction between sexually mature males and females
Difference between gram positive and negative bacteria
The difference between gram positive and gram negative is the stuctural difference in the cell walls
The conversion of one type of signal into another type of signal is called:
Answer:
Is called signal conversion.
Explanation:
The central sulcus separates which lobes?
The central sulcus separates the frontal lobe and the parietal lobe.
The central sulcus separates the frontal lobe and the parietal lobe.
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The central sulcus in the human brain separates the frontal lobe, which is primarily involved in motor function and decision-making, from the parietal lobe, which processes sensory information.
Explanation:The central sulcus is a notable landmark in the human brain—it separates the frontal lobe and the parietal lobe. These lobes are different regions of the brain that perform varied functions. The frontal lobe, anterior to the central sulcus, is involved in motor functions, decision-making, and certain aspects of personality. Meanwhile, the parietal lobe, located posterior to the central sulcus, processes sensory information including spatial position, navigation, and bodily awareness. Even though these lobes are differentiated by the central sulcus, their functions often interrelate, creating a comprehensive and unified system of brain function.
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