During pregnancy, a woman's areolae and nipples become darker under the influence of
A. vasopressin from the posterior pituitary gland.
B. estrogen and progesterone from the ovary.
C. melanocyte-stimulating hormone from the placenta.
D. melanin from the pineal gland.
Answer: C
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Which of these is true about the muscle named levator palpebrae superioris?
A) lifts the scapula B) elevates the eyebrow C) raises the upper eyelid D) originates at the back of the orbit E) originates at the back of the orbit and raises the upper eyelid
Cholinergic synapses release the neurotransmitter
A) norepinephrine. B) adrenalin. C) serotonin. D) acetylcholine. E) GABA.
The speed of individual particle diffusion is influenced by temperature and particle size, not by concentration
Indicate whether the statement is true or false
Erection of the penis results from ________
A) dilation of the veins in the penis B) a sympathetic reflex C) parasympathetic activation of the bulbourethral glands D) a parasympathetic reflex