The clitoris and penis both become erect upon sexual arousal. What accounts for this similarity?
A) The clitoris and penis are both partially shrouded by a prepuce.
B) The clitoris and penis develop from the same embryonic tissue.
C) The clitoris and penis are homologous structures. Both have columns of erectile tissue.
D) The clitoris and penis are avascular, cylindrical structures.
C
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Nucleosidase is an enzyme that breaks the
A. phosphodiester bond between nucleotides within DNA. B. bond that attaches the phosphate to the nucleoside. C. bond between the sugar and the nitrogenous base of the nucleoside. D. bonds within the nitrogenous bases of rRNA.
The ________ is the serous membrane that covers the surfaces of most abdominal organs.
Fill in the blank(s) with the appropriate word(s).
The early embryo has a single structure which will become either a penis or clitoris but not both at once.
a. true b. false
What does the term "power stroke" refer to?
A. The cleaving of ATP into ADP and a phosphate B. The shortening of actin filaments C. The transmission of a signal from the motor neuron to the muscle fiber D. The movement of the myosin head toward the center of the sarcomere E. The maximum force generated during a contraction