Which of the following is NOT part of the sperm?
A. Head
B. Tail
C. Body
D. Middle piece
Answer: C
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During the rising phase of the action potential,
a. PK+ is much greater than PNa+. b. PNa+. is much greater than PK+. c. PK+ is the same as PNa+ d. Na+ efflux occurs. e. two of these answers.
In which structure does fertilization usually occur?
A. Ovary B. Uterus C. Urethra D. Urinary bladder E. Uterine tube
A child is infected with chicken pox (Varicella-Zoster virus), which triggers a primary immune response. The memory cells produced to suppress further attacks by chicken pox consist of
A. B cells only. B. both B cells and T cells. C. T cells only. D. neither B cells nor T cells.
Cardiac muscle tissue
a. has well developed sarcoplasmic reticulum b. has fast myosin ATPase activity c. contracts only when stimulated neurogenically d. has gap junctions e. stores calcium in its T tubules