The function of the dartos and cremaster muscles is to
A. produce erections.
B. move sperm along the ductus deferens.
C. attach the penis to the body wall.
D. regulate the temperature of the testes.
E. help the testes descend into the scrotum prior to birth.
Answer: D
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The primary immune response ________.
A) occurs more rapidly and is stronger than the secondary response B) occurs when memory cells are stimulated C) is another name for immunological memory D) has a lag period while B cells proliferate and differentiate into plasma cells
The tonsils located at the base of the tongue are the ________
A) pharyngeal tonsils B) Peyer's tonsils C) palatine tonsils D) lingual tonsils
The only time during the cardiac cycle that the AV valves are open is systole
Indicate whether the statement is true or false.
Which of the following would be classified as an innate physical barrier?
A. activation of complement B. phagocytosis of invading organisms C. washing action of tears and saliva D. inflammation E. release of histamine