The process of decrease in any vessel diameter that occurs due to smooth muscle contraction is called:
a. vasodilation.
b. venodilation.
c. vasoconstriction.
d. venoconstriction.
e. None of the answers is correct.

c. vasoconstriction

Explanation:

Vasoconstriction is a process which involves the narrowing or tightening of blood vessels which becomes smaller when the smooth muscles of these vessels become contracted. The tightening or narrowing of the blood vessels results in an increase in resistance as blood pressure rises, which leads to the restriction of blood flow. Vasoconstriction is the opposite of vasodilation.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: