Which brain area is considered to be the integrating center for homeostasis?
a. hypothalamus
b. thalamus
c. pituitary gland
d. brain stem
e. medulla

A

Explanation:

The hypothalamus is a portion of the brain particularly concerned with homeostasis; it influences the action of the medulla oblongata, a lower part of the brain, the autonomic nervous system, and the pituitary gland.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.