Spermatids mature into spermatozoa by the process of
A) spermatogenesis.
B) meiosis.
C) mitosis.
D) spermiogenesis.
E) capacitation.
Answer: D
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Postganglionic axons usually are
A) myelinated. B) unmyelinated. C) larger than preganglionic fibers. D) located in the brain. E) located in the spinal cord.
What cells are responsible for cell-mediated immunological memory in which the immune response is expedited upon subsequent exposure to an antigen?
A) effector cells B) MHC molecules C) memory T cells D) B cells
The initial response to stress is called the ________ and is mediated mainly by ________
A) resistance stage; cortisol B) alarm reaction; norepinephrine and epinephrine C) alarm reaction; cortisol D) resistance stage; aldosterone and cortisol E) exhaustion stage; norepinephrine and epinephrine
Hydrochloric acid in the stomach has what pH?
A. 0.08 B. 0.8 C. 8.0 D. None of these are correct.