The major site of protein breakdown to form free amino acids is in the
kidney
spleen
liver
bone-marrow
C.
liver
The degradation of intracellular protein and other cytoplasmic macromolecules in liver is an ongoing process that regulates cytoplasmic mass and provides amino acids for energy and other metabolic uses early in starvation. Cellular proteins are conveniently divided into two general classes according to readily discernable differences in average rates of turnover. A short-lived class, having a half-life of approximately 10 min, comprises about 0.6% of total protein. Its degradation is not physiologically controlled, and the mechanism is probably nonlysosomal in nature.
Cholecystokinin stimulates the secretion of
bile
gastric juice
pancreatic juice
succus entericus
Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.
Column I | Column II |
Glycine and glucose | Small intestine and active absorption |
Fructose and Na+ | Small intestine passive absorption |
Glycerol and fatty acids | Duodenum and move as chilomicrons |
Cholesterol and maltose | Large intestine and active absorption |
The serous membrane which covers the lungs is called
pericardium
peritoneum
perichondrium
pleura