Adaptive significance is an important concept in physiology because it describes
A) the importance of a highly variable external environment.
B) the parameters necessary to maintain a constant internal environment.
C) the physiological functions that promote an organism's survival.
D) the similarities between ancient and modern marine organisms.
E) the ability of an organism to monitor and restore its internal state to normal conditions when necessary.
C) the physiological functions that promote an organism's survival.
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When a hiker encountered a bear in the wilderness, which part of her autonomic nervous system activated?
A. Parasympathetic B. Sympathetic C. Limbic D. Somatic
The partial pressure of carbon dioxide in the interstitial space of peripheral tissues is approximately
A) 35 mm Hg. B) 45 mm Hg. C) 55 mm Hg. D) 70 mm Hg. E) 100 mm Hg.
During the luteal phase of the ovarian cycle, progesterone is ________ estrogen.
A) less than B) equal to C) greater than
Micturition
a. is the process of emptying the bladder. b. is a parasympathetic reflex. c. is initiated when stretch receptors in the bladder wall are excited. d. both (a) and (b) above. e. all of these answers.