Answer:E. Down-regulation
Explanation:Cells typically up or down regulate depending on the concentration of a hormone levels. When there is a excessive concentration of a hormone in the blood stream, the cell decreases the number of receptors reducing the interaction with that hormone, Also, when there is excessive hormone reduction, the target cells activate to increase their number of receptors.
Down regulation occurs by the the deactivating or degrading of target cells to reduce the number of receptors due to their sensitivity to a particular excess hormone.
They must be able to reproduce fertile offspring.
Answer:
The Bicuspid valve or Mitral valve found between the left atrium and left ventricle.
Explanation:
- A bicuspid valve or Mitral valve is an atrioventricular valve. It is one of the valves of the heart's four valves.
- It regulates the blood flow from the left atrium (upper left chamber) to the left ventricle (lower left chamber).
- It mainly prevents the backflow of blood from the left ventricle to the left atrium.
A chriping bird i would say.
If your body lacks enzymes that break down
carbohydrates, it would be unable to get sugar molecules for energy production.
If you lacked the enzyme to digest proteins, you may not absorb enough amino
acids.
<span>The digestive system in our body changes
carbohydrates into glucose; also known as blood sugar to be use as an important
source of energy. Meanwhile, amino acids are organic compounds that combine to
form proteins, which are the building blocks of life.</span>
