Which of the choices below does not involve tissue perfusion?
A) delivery of oxygen and nutrients to, and removal of wastes from, tissue cells
B) gas exchange in the lungs
C) absorption of nutrients from the digestive tract
D) blood clotting
D) blood clotting
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The most important factor regulating the mammalian ECF volume and blood pressure is
a. vasopressin. b. thirst. c. increase of Na+ ions in ECF. d. renin-angiotensin-aldosterone system. e. decrease of K+ ions in ECF.
Which of the following statements regarding complement is FALSE?
A. Certain complement proteins are always circulating in the blood in an inactive state. B. Activated complement can form a membrane attack complex, which forms pores in microbe membranes. C. Activated complement can stimulate cells to secrete inflammation-mediating chemicals. D. The complement pathway is always dependent upon activation of the first complement protein, C1. E. Some activated complement proteins activate other complement proteins.
Which type of vertebrae has costal facets?
A. Cervical B. Sacral C. Lumbar D. Thoracic
The component of a control system that provides the means for the control center’s response (output) is called the ________.