The head of a sperm contains
A. a nucleus enclosing 23 chromosomes.
B. a large amount of cytoplasm.
C. many organelles.
D. All apply.
Answer: A
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The influence of oxytocin on the uterus during childbirth and the subsequent effect of uterine stretch on the release of oxytocin is an example of
a. negative feedback b. positive feedback c. extrinsic control d. negative feedback and extrinsic control e. none of these
Renal clearance is the net effect of which of the following? select all that apply.
a) tubular reabsorption b) metabolic deactivation c) tubular secretion d) dietary intake e) glomerular filtration
The sleep/wake cycle is influenced by the
A. basal nuclei. B. reticular formation. C. vermis. D. thalamic nuclei. E. cerebellum.
Most parasympathetic fibers reach their target organs by way of which nerve?
A. Vagus B. Oculomotor C. Trigeminal D. Splanchnic E. Accessory