The plasma membrane of an axon is called the
A) axon terminal.
B) neurilemma.
C) myelin sheath.
D) sarcolemma.
E) axolemma.
E
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A bit of dust blows into and touches the cornea of the eye. Which of the following is likely to happen?
A) Stimulation of the facial nerve (VII) will be perceived as pain. B) Stimulation of the optic nerve (II) will cause tears to flow from the lacrimal gland. C) Nothing, because there is no sensory information sent from the cornea. D) Stimulation of the ophthalmic division of the trigeminal nerve (V) will cause blinking.
Throughout most of the distal convoluted tubule, the tubular cells
A) actively transport urea out of the tubular fluid. B) actively reabsorb organic nutrients, plasma proteins, and ions from the filtrate. C) reclaim 60-70% of the volume of filtrate at the glomerulus. D) are impermeable both to water and to solutes. E) actively transport sodium ions out of the tubular fluid.
What is the function of the milky-colored fluids secreted from the prostate?
A) enable sperm to swim B) activate sperm C) cleanse the urethra D) neutralize urine E) begin spermatogenesis
How does fluid accumulation in the lungs affect vital capacity?
A) Vital capacity increases in females but not in males. B) Vital capacity decreases in females but not in males. C) Vital capacity increases in both sexes equally. D) Vital capacity decreases in both sexes equally. E) Accumulating fluid has no effect on vital capacity.