Before parturition,
A. the placenta secretes increased amounts of oxytocin.
B. the uterus stretches, causing the release of ACTH from the adenohypophysis.
C. there is an increase in the stimulatory effects of progesterone on the uterine muscle.
D. prostaglandin synthesis is inhibited.
E. fetal glucocorticoids decrease the production of progesterone by the placenta.
E
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Inflammation of the gallbladder is termed
A) cirrhosis. B) hepatitis. C) gastritis. D) cystitis. E) cholecystitis.
Inhibin is secreted by
A. uterine lining cells, and it inhibits development of ovarian follicles. B. the anterior pituitary, and it inhibits GnRH production. C. follicular cells, and it inhibits FSH production. D. the posterior pituitary, and it inhibits ovulation. E. hypothalamic cells, and it inhibits LH production.
Curare is a competitive ACh antagonist at ________ ACh receptors.
A. muscarinic B. nicotinic C. kainate D. NMDA
Compare nicotinic receptors and muscarinic receptors
A) Nicotinic receptors are acetylcholine receptors on the surface of sympathetic and parasympathetic ganglionic cells. Muscarinic receptors are acetylcholine G protein-coupled receptors located at all parasympathetic neuromuscular and neuroglandular junctions, and at a few sympathetic neuromuscular and neuroglandular junctions. B) Nicotinic receptors are acetylcholine G protein-coupled receptors located at all parasympathetic neuromuscular and neuroglandular junctions, and at a few sympathetic neuromuscular and neuroglandular junctions. Muscarinic receptors are acetylcholine receptors on the surface of sympathetic and parasympathetic ganglionic cells. C) Nicotinic receptors binds epinephrine on the membrane of sympathetic target cells. Muscarinic receptors binds norepinephrine on the membrane of sympathetic target cells. D) Nicotinic receptors binds norepinephrine on the membrane of sympathetic target cells. Muscarinic receptors binds epinephrine on the membrane of sympathetic target cells. E) Nicotinic receptors binds norepinephrine and epinephrine on the membrane of sympathetic target cells. Muscarinic receptors are acetylcholine receptors on the surface of sympathetic and parasympathetic ganglionic cells.