Labor is regulated by
A. positive feedback control.
B. estrogen.
C. negative feedback control.
D. prolactin.
Answer: A
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Which number indicates the lunula?
A. 1 B. 2 C. 3 D. 4 E. 5
Which of the following would cause a decrease in the excretion of Na+ and water?
A. increased hydrostatic pressure in the afferent renal arterioles B. increased mean arterial blood pressure C. increased atrial distension D. decreased aldosterone secretion E. decreased atrial natriuretic peptide secretion
Skeletal muscle is highly thermogenic; that is, is produces heat. How?
A. Skeletal muscle contracts around sweat glands, producing heat. B. It breaks down ATP when it contracts; this produces heat. C. The friction produced when actin and myosin slide past each other produces heat. D. When myofilaments shorten, they release heat.
Which blood type is called the universal donor?
A) Type O B) Type A C) Type B D) Type AB