The narrow space that separates the motor neuron and the skeletal muscle fiber in a neuromuscular junction is called the
A. synaptic vesicle.
B. synaptic knob.
C. motor end plate.
D. synaptic cleft.
Answer: D
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As an adult ages, the symphysial surface of the pubis
A. becomes more flattened, and the bony ridge at its circumference progressively disappears. B. becomes more flattened, and a bony rim forms at its circumference. C. becomes more billowed, and the bony ridge at its circumference progressively disappears. D. becomes more billowed, and a bony rim forms at its circumference.
What do chemoreceptors monitor?
a. acidity b. protein or fat content of ingested food c. salt content d. osmolarity e. toxicity
Thyrotropin-releasing hormone targets the ________.
A. thyroid hormone B. thyroid gland C. anterior pituitary D. posterior pituitary E. hypothalamus
Which of the following decreases heart rate, and thus cardiac output and blood pressure?
A) angiotensin-II B) acetylcholine C) norepinephrine D) epinephrine