If the radius of a vessel decreases, then:
a. Blood volume increases
b. The cardiac cycle time increases
c. SVR increases
d. SVR decreases
Ans: c. SVR increases
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Lymphatic capillaries
A. cannot be discerned structurally from cardiovascular system capillaries. B. originate as closed-ended tubes associated with blood capillary networks. C. filter lymph. D. concentrate lymph prior to passing it to larger lymphatic vessels. E. include layers of smooth muscle for peristalsis.
Which of the following would be an adequate stimulus for a mechanoreceptor?
A) pH B) cell stretch C) oxygen D) photon of light E) cold temperature
In people who stand for long periods, blood tends to pool in the lower limbs, and this may result in varicose veins. What causes the varicose veins?
A. Failure of the lymphatic valves B. An aneurysm or weak point in an artery C. An aneurysm or weak point in a vein D. A ruptured aneurysm in a vein E. Failure of the venous valves
Anatomy and physiology are defined as the study of ________.
A. how the body functions B. the body's structure and how those structures function C. body structures D. the normal and abnormal function of the body