Veins are much more easily distended under pressure than are arteries
A) only in a few specialized cases.
B) because their walls are thinner and contain a lower proportion of smooth muscle fibers.
C) because their walls are thicker, and veins contain a greater proportion of elastic fibers and collagen.
D) because of vasoconstriction.
E) None of the answers are correct.
D) because of vasoconstriction.
You might also like to view...
In which direction does carbon dioxide move during internal respiration?
A) from the blood into the tissue cells B) from the blood into the lungs C) from the lungs into the atmosphere D) from the tissue cells into the blood E) from the lungs into the blood
In this view of the olfactory organs, what structure does number 1 indicate?
A. Axon of olfactory receptor cell B. Olfactory receptor C. Olfactory hairs D. Olfactory bulb E. Basal cell
Which of the following is NOT one of the four major processes of respiration?
A) pulmonary ventilation B) gas transport C) oxygen-hemoglobin dissociation curve D) pulmonary gas exchange
An important protein in the activation of the alternative pathway of complement activation is
A) properdin. B) interferon. C) histamine. D) fibrin. E) C1.