Which of the following descriptions of the autonomic innervation of the cardiovascular system is FALSE?
A) Both sympathetic and parasympathetic neurons innervate smooth muscle in arterioles.
B) Only sympathetic neurons innervate smooth muscle in veins.
C) Sympathetic activity increases cardiac output, whereas parasympathetic activity decreases
cardiac output.
D) Only sympathetic neurons provide significant innervation of the contractile cells of the heart.
E) Both sympathetic and parasympathetic neurons innervate the SA node
Ans: A) Both sympathetic and parasympathetic neurons innervate smooth muscle in arterioles.
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One of the basic principles of evolution is the concept of ____
a. genetic drift b. divergent physiology c. economic diversity d. a shared ancestor e. creationism
The hominoid genus Pongo includes:a
gorillas. b. gibbons. c. orangutans. d. chimpanzees. e. humans.
An inadequate supply of which of the cells depicted in Figure 44-2 may be responsible for anemia?
a. cell type A only
b. cell type B only
c. cell type C only
d. cell type D only
e. both cell type A and cell type C
What are the predicted phenotypes of the female children from the union of a woman who is heterozygous for
hemophilia and a man who has normal blood clotting characteristics? (Use the Punnett square to verify your answer.) a. all carriers b. 3 homozygous normal : 1 carrier c. 1 homozygous normal : 1 carrier
d. 1 hemophilia: 2 homozygous; normal : 1 carrier e. all hemophiliacs