The acrosome cap contains
A. testosterone.
B. buffers to neutralize the acidity of the female reproductive tract.
C. mitochondria to provide energy for movement.
D. enzymes to allow penetration into the oocyte.
E. nutrients to sustain the sperm.
Answer: D
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Sweat glands and arrector pili muscles are controlled
A. by both the sympathetic and parasympathetic nervous systems. B. only by the sympathetic nervous system. C. by both the autonomic and somatic nervous systems. D. only by the parasympathetic nervous system.
Cerebral blood flow is regulated by ________
A) skin temperature B) ADH C) the hypothalamic "thermostat" D) intrinsic autoregulatory mechanisms
What prevents blood from clotting?
A) heparin B) fibrin C) platelets D) fibrinogen
If your doctor notices a marked decrease in calcium ion levels in your blood, what gland might he suspect is not functioning properly and why?
What will be an ideal response?