The function of melanin is providing variation in the skin colors. Also, provide protection from the harmful radiation that causes cancer.
Further Explanation:
Melanin is a pigment which is secreted by the melanocytes cells. They are present in the innermost layer of epidermis which is stratum basale. Melanin pigment is responsible for human hair color, skin color, and eyes color. Brown skin color has a high amount of melanin and white skin color have low level of melanin. Melanin has three different types
Eumelanin Pheomelanin Neuromelanin
Eumelanin is mainly responsible for the dark skin and pheomelanin is accountable for the lighter skin color. Melanin is a pigment mainly present inside the skin; it mainly blocks the Ultra-Violet radiation from causing harmful effect in the DNA and also potentially causing skin cancer. If an individual has low level of melanin, then they are more prone to Ultraviolet rays. They can easily get sun burn. Also, they are more prone to cancer.
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Answer Details:
Grade: High School
Subject: Health
Topic: Melanin pigment
Keywords:
Melanin pigment, eumelanin, pheomelanin, skin, DNA, cancer, ultra-violet rays, neuromelanin, white, dark, brown, eyes, skin, hair, color, pigment.
A jogger jogs from one end to the other of a straight track in 1.13 min and then back to the starting point in 1.63 min. What is the jogger’s average speed in jogging to the far end of the track (assuming the track is 100 m long)
Answer:
Average speed of jogger,s=72.46 m/min
Explanation:
Total distance covered by a body divided by the elapsed time to cover that distance is known as average speed of that body.
We have given length of track=100m
Therefore total distance covered by the jogger,
[tex]d=100m+100m\\d=200m[/tex]
Total time taken by joggers to cover 200m distace,
[tex]t=1.13 min+1.63m[/tex]
t=2.76 min
Therefore average speed of jogger,
[tex]s=\frac{d}{t}[/tex]...............(1)
put values of d and t in equation 1
we got,
[tex]s=\frac{200 m}{2.76 min}[/tex]
average speed of jogger,s=72.46 m/min
A deficiency in the neurotransmitters _____ seems to be associated with obsessive-compulsive disorder. serotonin and norepinephrine dopamine and glutamate lithium and dopamine serotonin and glutamate
The correct answer is A. Serotonin and norepinephrine
Explanation:
The obsessive-compulsive disorder is a mental disorder characterized by the individual experiencing constant compulsive behaviors such as repeating an action multiple times, as well as behaviors that represent obsessions such as obsessive thoughts about some situation.
In terms of cause, it has been found this mental disorder is related to genetics, but also to a deficiency in the neurotransmitters serotonin and norepinephrine considering serotonin has a connection with mood and feeling happy; while norepinephrine is related to alertness, attention, and anxiety which are all aspects that represent an issue in Obsessive-compulsive disorder. Indeed, one of the most effective treatments for this mental disorder is a combination of serotonin and norepinephrine reuptake inhibitors that regulate and increase the amount of serotonin and norepinephrine in the individual.
In addition to fossil evidence for evolution, other lines of evidence can include:
Which one of the following is the most inclusive category?
A) ecotone.
B) landscape.
C) ecosystem
D) biotic community
The most inclusive category among the given options is ecosystem.
Explanation:The most inclusive category among the given options is ecosystem. An ecosystem includes all living organisms in a given area, along with the nonliving environment. It encompasses multiple populations, communities, and interactions between biotic and abiotic factors. An ecosystem encompasses everything in a particular area or environment. It includes not only all living organisms (plants, animals, microorganisms) but also the nonliving components like air, water, soil, sunlight, temperature, and minerals. This holistic approach considers the intricate interrelationships between living (biotic) and nonliving (abiotic) factors.
Final answer:
The most inclusive category among the given options is landscape, as it encompasses multiple ecosystems and includes a variety of biological and physical components. So the correct option is B.
Explanation:
The question asks for the most inclusive category among the given options. To determine this, we need to understand the hierarchy of biological organization. An ecosystem consists of all the living things in a given area, together with the nonliving environment, including abiotic factors such as water, minerals, and sunlight. On the other hand, a biotic community contains all the populations of different species that live and interact in the same area. A landscape includes a range of ecosystems and can consist of protected areas, private lands, and a diversity of habitats. Lastly, an ecotone is a transition area between two biomes. Based on this information, the most inclusive category is B) landscape because it encompasses multiple ecosystems and the variety of biological and physical components they include.
Greta is 38 years old and 15 weeks into her first pregnancy. which test will her doctor recommend to detect any genetic abnormalities in the fetus?
Which of the following criteria do astronomers use to classify an object as a planet
What moves during osmosis and how does it move? Please give an example of something that moves by osmosis.
Osmosis is the movement of water through a semipermeable membrane from an area of high concentration to an area of low concentration. This process plays a critical role in biological systems including the human body, contributing to the balance of water and solutes in cells. An example can be seen when a limp carrot is restored to crispness when placed in water, as it undergoes osmosis.
Explanation:In the process called osmosis, water moves through a semipermeable membrane from an area of high water concentration to an area of low water concentration. This movement is driven by a concentration gradient and occurs either directly through the lipid layer or via protein channels in the cell membrane. Aquaporins, or water channels, play a significant role here, especially in red blood cells and kidney tubules.
An everyday example of osmosis can be observed when limp celery or carrots are placed in water. The water moves into the cells of the vegetables, making them crisp again. This movement of water is due to osmosis, where the water moves from an area of higher concentration (in the water outside) to an area of lower concentration (inside the limp vegetable cells).
In our body, osmosis plays a critical role in maintaining the correct balance of water and solutes inside and outside of cells. Maintaining this balance is crucial for normal cellular functions, and adjustments to this balance can cause cells to swell or shrink.
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List the three main differences between rna and dna
When developing an awareness program, what priorities should you keep in mind?
Which of the sexually transmitted diseases was left out of the center for disease control study referred to by mackinnon?
Which of the following practice will lead yo sustainability?
A. Increased groundwater pumping
B. Fossil Fuel Use
C. Conservation Tillage
D. Increased Pesticide Use
Answer:
Conservation tillage.
Explanation:
Tillage refers to agricultural methods that is practiced before growing crops it could be by digging, overturning , ploughing e.t.c.
Conservation tillage is a type of tillage that involve practices which leave the soil undisturbed. It could either be no till I .e the soil is not disturbed at all or mulch uses the chisel to till the soil before planting and ridge till in which the the seeds are planted on a seed beds. This type of tillage conserve the soil by reducing erosion.
Erosion bring about removal of soil tip layer, washing away of nutrients which is important for plants growth. Through conservation tillage soil structure and nutrients are preserved and sustained.
Answer:
c. Conservation Tillage
Explanation:
What would you expect ir spectrum of 1,1'- diacetylferrocene to look like?
The IR spectrum of 1,1'-diacetylferrocene would typically show peaks indicating carbonyl (C=O) stretching vibrations for the acetyl groups.
C=O Stretching Vibration: One prominent feature would be the sharp peaks in the range of approximately
These peaks indicate the stretching vibrations of the carbonyl (C=O) groups present in the acetyl (CH3-CO-) moieties of the diacetylferrocene molecule.
C-H Stretching Vibration: The spectrum may also display peaks in the range of corresponding to the stretching vibrations of C-H bonds in the methyl (CH3) groups of the acetyl units.
Ferrocene Skeleton: The ferrocene core, which is a sandwich-like structure with iron (Fe) atoms bound to cyclopentadienyl rings, might contribute to characteristic peaks.
These usually occur in the , indicating the Fe-C stretching and bending vibrations.
Understanding the expected IR spectrum of 1,1'-diacetylferrocene allows for the identification and confirmation of its molecular structure.
The carbonyl stretching vibrations at around are particularly distinctive for compounds containing acetyl groups.
The presence and position of these peaks, along with other characteristic peaks, can help chemists analyze and verify the structure of the synthesized compound and gain insights into its bonding and functional groups.
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Please help ASAP! The questions are in the attachment.
Now put yourself in the place of the physician or nurse caring for vivian armand. would it be more understandable to only allow vivian to view certain parts of the chart, for example her current medication list and current lab or test results? why or why not? explain if there would be advantages or disadvantages.
Alcohol interacts with more types of receptors, neurotransmitters, and genes than do marijuana and cocaine.
Both invertebrates and vertebrates, with the exception of the _____, have a nervous system. lancelet reptile mollusk sponge
The heart exhibits _____, meaning that the heart itself is responsible for initiating the heartbeat.\
The heart's automaticity and the role of the SA node are crucial in initiating heartbeats independently.
The heart exhibits automaticity, meaning that the heart itself is responsible for initiating the heartbeat. For example, the sinoatrial (SA) node acts as the heart's natural pacemaker, generating electrical impulses to regulate heartbeats.
describe the phospholipid In the upper left part of the transparency
How does sensation influence our behaviour in the environment.?
If a plant has 18 chromosomes how many would be present in each of its gametes
summarize what is meant by the idea that matter and energy flow
The high concentration of solutes in the soil, formed from the salt and melting snow, would result in
Actually since there are more solutes in the soil, then we could say therefore that there is a low water potential in the soil around that region. This creates a great problem for plants which are growing in that region, those plants would have a hard time absorbing water due to high concentration of solute in the soil.
Answer:
a low water potential in the soil
Studies of oxygen transport in pregnant mammals show that the o2-saturation curves of fetal (hbf) and maternal (hba) hemoglobin are markedly different when measured under the same conditions. which hemoglobin has a higher affinity for o2 at the tissue po2 of around 4 kpa?
Final answer:
Fetal hemoglobin (HbF) has a higher affinity for oxygen at a tissue pO₂ of around 4 kPa compared to maternal hemoglobin (HbA). This is due to fetal hemoglobin's different configuration and its inability to bind 2,3 BPG, allowing it to more effectively draw oxygen from maternal blood.
Explanation:
Studies of oxygen transport in pregnant mammals show marked differences in the O₂-saturation curves of fetal (HbF) and maternal (HbA) hemoglobin when measured under the same conditions. At a tissue partial oxygen pressure (pO₂) of around 4 kPa, fetal hemoglobin has a higher affinity for oxygen compared to maternal hemoglobin. This difference is crucial for the effective transfer of oxygen from the mother to the fetus.
Fetal hemoglobin, with a slightly different configuration (x₂y₂) compared to adult hemoglobin (a₂ß₂), does not bind 2,3 BPG as adult hemoglobin does. This absence in binding leads to fetal hemoglobin remaining in the R-state more frequently, resulting in a greater affinity for oxygen than adult hemoglobin. This mechanism ensures that the fetus can effectively draw oxygen from the maternal blood, overcoming the lower partial pressure of oxygen in the placental blood.
What happens on the outer surface of a cell?
Why do plants put so many nutrients in fruit when the fruit does not provide nutrients to the growing seed?
a.the fruit helps disseminate the seeds by attracting animals that carry the fruit far from the plant
b.as the fruit decomposes it fertilizes the soil in which the seed will grow
c.the fruit stores nutrients that the parent plant will use in the winter when there is less sunlight for performing photosynthesis
d.the fruit attracts insects which pollinate the flower; otherwise the seed would never get fertilized?
Plants cannot directly incorporate nitrogen (n2) into organic compounds. they depend on ___ to make nitrogen available to them.
The inner membrane folds of mitochondria, where many of the reactions of aerobic cellular respiration occur, are called
The semisterility of genotypes heterozygous for a reciprocal translocation results from the lethality due to the chromosomal abnormalities produced by
Final answer:
Semisterility in genotypes heterozygous for a reciprocal translocation occurs due to complications during meiosis that lead to nondisjunction and aneuploidy, often resulting in lethal genetic imbalances in embryos.
Explanation:
Semisterility in organisms heterozygous for a reciprocal translocation is a consequence of chromosomal abnormalities that occur during meiosis. Reciprocal translocations involve the exchange of segments between non-homologous chromosomes. During meiosis, these altered chromosomes can lead to problems with segregation, resulting in gametes that have an abnormal number of chromosomes, a condition known as nondisjunction. In many cases, such abnormalities can lead to lethal genetic imbalances in the resulting zygotes.
Nondisjunction during meiosis I or meiosis II can give rise to gametes with either too few or too many chromosomes, leading to disorders known as aneuploidy. While some aneuploid conditions can be viable, such as trisomy 21 (Down syndrome), others are often lethal. The lethality associated with the semisterility of genotypes heterozygous for a reciprocal translocation usually arises because the resultant gametes, and therefore the embryos, suffer from significant genetic imbalances due to the mistimed segregation of the translocated chromosomes.
When such a translocation is present, the meiotic process is challenged by the need to segregate chromosomes that do not have typical homologous alignment, leading to an increased likelihood of nondisjunction and as a result, nonviable or semisterile offspring. This is why carriers of reciprocal translocations may experience reduced fertility.
While auscultating the heart, a healthcare provider notices s3 heart sounds in four clients. which client is at more risk for heart failure?
A 15 year-old has been taken to surgery for crushing his index and middle fingers and injuring his digital nerves. the provider located the damaged nerves in both fingers and sutures them to restore sensory function. what cpt® codes are reported?
The CPT® codes that would be reported for the surgery to restore sensory function in the index and middle fingers would depend on the specific procedures performed.
Explanation:The CPT® codes that would be reported for the surgery to restore sensory function in the index and middle fingers of the 15-year-old patient would depend on the specific procedures performed. Typically, nerve repair procedures are reported using CPT® codes from the 64910-64911 series.
For example, if both fingers required repair of the digital nerves, you would report CPT® codes 64911 for the repair of each separate digital nerve. In addition to the nerve repair codes, any other applicable CPT® codes for the surgery, such as for the suturing and closure of the wounds, should also be reported.