What happens when atp supplies energy for thin filaments in a muscle fiber to slide over the thick filaments?
a. the muscle contracts
b. the muscle relaxes
c. the muscle both contracts and relaxes
d. the muscle neither contracts nor relaxes
hair would be dry and brittle without the presence of
a. sebaceous glands
compared with the walls of arteries the walls of capillaries
a. are thicker
b. are thinner
c. lack valves
d. have more resistance
The answer to your questions areaab
Lipids are macromolecules which provide insulation.
A macromolecule is a large molecule. There are four groups of macromolecules: carbohydrates, proteins, nucleic acids and lipids. Lipids consist of glycerol and fatty acids and are constructed from fats, oils, waxes, phospholipids and steroids. A lipid's function is to insulate the body and provide warmth in cold conditions. It can be concluded that a person with very little body fat gets very cold easily and a person with a lot of body fat gets very warm very quickly.
3. B. Thinner
A) sebaceous glands
Sebaceous glands are responsible for producing and secreting sebum, a substance that can lubricate and waterproof the skin and hair, giving them a brighter appearance.
However, a high production of sebum through these glands can cause exaggerated greasiness in the hair as well as acne on the skin.
Meanwhile, low sebum production can leave the skin dull and dehydrated, causing premature aging, and leaving hair dry and brittle due to lack of lubrication.
Actually keratin is not correct
The correct answer to your question is
Melanin darkens the skin and hair. Melanin protects the skin and eyes from light and the damage/radiation caused by the sun. Keratin strengthens the skin and hair cells, but can be found all over the body. Keratin is made up of proteins which gives it the strengthening properties.
The correct answer is option A, that is, keratin.
Keratin refers to a protein that belongs to one of the families of fibrous structural proteins. It is the essential structural substance that forms nails, hair, horns, feathers, external layer of the skin, and hooves. It is the protein, which safeguards epithelial cells from stress or destruction. Keratin is tremendously insoluble in organic solvents and water.
2. Idk sorry
3. D. epidermis
Which of the following statements regarding melanin is true?
a. During pregnancy melanin production is increased.
small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.