Preganglionic fibers that innervate the collateral ganglia form the
A) adrenal medulla.
B) celiac ganglia.
C) sympathetic chain ganglia.
D) inferior mesenteric ganglia.
E) splanchnic nerves.
E
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More than one sperm is prevented from fertilizing an egg by all of the following mechanisms except:
A. Opening sodium channels in the plasma membrane causes a change in the electrical charge of the membrane. B. Secretion of material from cortical granules pushes sperm away from the already fertilized egg. C. A slow block to polyspermy occurs. D. A fast block to polyspermy occurs. E. Meiosis II is completed by the egg.
Which of the following is not true of oxytocin?
A) It is one of the few hormones that is regulated by a positive feedback loop. B) It is produced in the thyroid gland. C) It stimulates "milk letdown" in nursing mothers. D) It causes the contractions of the uterus during labor.
At which temperature would the rate of diffusion of dye molecules be the highest?
A) 95 degrees C B) 5 degrees C C) 25 degrees C D) 10 degrees C
Which of the following is not part of the appendicular skeleton?
A. Patella B. Sacrum C. Os coxae D. Clavicle E. Scapula