Which effectors of the PNS are served by somatic motor nerves?
A. Skeletal muscle
B. Cardiac muscle
C. Smooth muscle
D. Glands
Answer: A
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What is the difference between elastic arteries and muscular arteries?
A) Elastic arteries have more smooth muscle than muscular arteries. B) Muscular arteries have larger lumens than elastic arteries. C) Elastic arteries have elastic fibers throughout the tunica media whereas muscular arteries have few elastic fibers in the tunica media. D) Elastic arteries are closest to the arterioles and muscular arteries are farther away. E) Elastic arteries have a larger tunica intima and tunica media compared to muscular arteries.
The fusion of the brachiocephalic veins forms the
A) inferior vena cava. B) superior vena cava. C) innominate vein. D) subclavian vein. E) azygos vein.
You are studying the toxic effects of a newly discovered tropical plant extract. From preliminary studies, it appears that the toxin prevents H+-dependent membrane transport. Explain which digestive processes may thus be impaired.
What will be an ideal response?
Neurons that have two or more dendrites and a single axon extending away from the cell body are called
A) polypolar. B) unipolar. C) bipolar. D) tripolar. E) multipolar.