Menstruation is initiated by
a. a rapid increase in estrogen levels.
b. a rapid drop in estrogen levels.
c. a rapid drop in progesterone levels.
d. both (a) and (b) above.
e. both (b) and (c) above.
E
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If a substance is not immunogenic by itself, but initiates an immune reaction when combined with a protein in the body, that substance is called a ________.
Fill in the blank(s) with the appropriate word(s).
What advantages does ATP have in being the energy currency molecule?
What will be an ideal response?
Estrogen exerts a ________ influence on the hypothalamus, increasing secretion of ________ and thus increasing LH and FSH secretion.
A. negative; GnRH B. positive; progesterone C. negative; progesterone D. positive; GnRH
Which muscle has three attachments to bone?
A) mylohyoid B) stylohyoid C) sternocleidomastoid D) thyrohyoid E) sternohyoid