NO can only function as a paracrine regulator because____
a. it is hydrophilic and cannot travel free in the blood
b. it is hydrophobic and cannot travel free in the blood
c. it is rapidly converted into nitrates and nitrites
d. its receptors are rapidly turned over
e. its receptors are immediately internalized when the ligand binds
ANSWER: c
You might also like to view...
Trichomonas vaginalis lacks mitochondria
Indicate whether this statement is TRUE or FALSE.
The first fungi were most likely ____
a. airborne b. terrestrial c. arboreal d. aquatic e. amphibious
When a plant encounters stressful hot and dry conditions, the
A. stomata close, and depending on the plant, will decrease or increase gas exchange. B. stomata close, increasing gas exchange. C. stomata open, decreasing gas exchange. D. stomata open, increasing gas exchange. E. stomata close, decreasing gas exchange.
Consider the statement “biological systems interact.” What does this mean?
a. Systems combine to reproduce. b. Biological organisms are interdependent. c. Structure and function are not interrelated. d. Biological organisms are not interdependent. e. Every organism is in conflict with other organisms