Neurotransmitter receptors at the postsynaptic membrane act as ____-regulated ion gates.
Fill in the blank(s) with the appropriate word(s).
chemical or ligand
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Mechanoreceptors and chemoreceptors are found in the
A. mucosa and submucosa of the GI tract along its length. B. muscularis interna of the entire length of the GI tract. C. adventitia of the upper portion of the GI tract. D. myenteric plexus of the mucosa of the intestine. E. epithelium of the inferior portion of the GI tract.
An impulse from one nerve cell is communicated to another nerve cell via the ________
A) synapse B) cell body C) receptor D) effector
Farsightedness that begins in middle age is known as:
A) presbyopia. B) glaucoma. C) cataract. D) none of the above.
Which is NOT true about the actions of progesterone?
A. It increases contractions and activity of the fallopian tube smooth muscle and cilia. B. It induces thick, sticky mucus in the cervix. C. It inhibits the milk-inducing effects of prolactin. D. It increases body temperature. E. It exerts negative feedback on the hypothalamus and anterior pituitary.