Which of the following is not a function of the vagina?
A. The vagina delivers the egg to the uterus.
B. The vagina is a receptacle for semen.
C. The vagina serves as the birth canal.
D. The vagina allows for the flow of the menses during menstruation.
Answer: A
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The internal anatomy of the brain has which structure?
A) White matter only B) White matter surrounded by gray matter C) Gray matter surrounded by white matter D) Gray matter only
The three major subdivisions of a cell are the ____________________, the ____________________, and the ____________________
Fill in the blank(s) with correct word
One advantage of signaling pathways involving the generation of second messengers has compared to a signaling pathway that utilizes the influx of ions is
a. the former are much faster in terms of generating cellular responses to first messengers. b. the former are slower in terms of generating cellular responses, allowing cells to be more circumspect in their response to chemical signals. c. the former require less first messenger to elicit a response, since they allow for signal amplification. d. the former require more first messenger to elicit a response, allowing for more rapid termination of the signaling event. e. none of these.
In terms of their chemical structure, cytokines are _______; their function is to serve as _________
A. proteins; chemical messengers B. proteins; receptors C. steroids; chemical messengers. D. steroids; receptors.