Spermatogenesis requires which of the following hormones?
A. LH
B. FSH
C. Testosterone
D. All three are necessary for spermatogenesis.
Answer: D. All three are necessary for spermatogenesis.
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If a woman ovulates two oocytes and both are fertilized,
A. paternal twins result. B. identical twins result. C. fraternal twins result. D. conjoined twins result. E. monozygotic twinning occurs.
the biceps brachii _________________ the elbow.
Fill in the blank(s) with the appropriate word(s).
Gray matter is present in a spinal cord in three horns. Surgically cutting across the horns would destroy which type of material?
A. Myelinated axons B. Cell bodies C. Potassium channels D. Depolarizing axons
Kassie is allergic to bee stings. During a play date at the park, she gets stung and goes into anaphylactic shock while she's playing with her friends. Which of the following occurs during anaphylaxis?
A. High blood pressure B. Heart failure C. Widespread vasoconstriction D. Turning off of mast cells and basophils