Which of the following does not describe accessory organs of the male reproductive system?
a. produce spermatozoa
b. a series of ducts or passageways to carry sperm
c. external genitals
d. glands that provide secretions to protect and nurture the sperm
a. produce spermatozoa
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The correct chronological pathway of fertilization is
A. pronuclei fusion ? corona radiata penetration ? zona pellucida penetration. B. corona radiata penetration ? pronuclei fusion ? zona pellucida penetration. C. zona pellucida penetration ? corona radiata penetration ? pronuclei fusion. D. corona radiata penetration ? zona pellucida penetration ? pronuclei fusion. E. pronuclei fusion ? zona pellucida penetration ? corona radiata penetration.
The hormone that dominates during the alarm phase of the general adaptation syndrome (GAS) is
A) testosterone. B) aldosterone. C) cortisol. D) thyroid hormone. E) epinephrine.
Which statement is true about T cells?
A) They will develop into cytotoxic T cells if antigen is complexed with class II MHC proteins. B) Once activated, they cannot secrete cytokines. C) Their proliferation is enhanced by interleukins 1 and 2. D) They usually directly recognize antigens, which then activates a subpopulation of killer cells.
Which of these is NOT associated with the medulla oblongata?
A. Cardiac center B. Pyramids C. Pineal glands D. Olivary nuclei