Cleavage occurs during
A. the fetal period.
B. the pre-embryonic period.
C. organogenesis.
D. the embryonic period.
E. fertilization.
B
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Which of the following is incorrect pertaining to the sacrum?
A) It articulates with the L5 vertebra at the lumbosacral angle. B) It articulates with the coccyx at its apex. C) Its sacral hiatus leads to the sacral canal. D) Its cornua articulate with the inferior articular facets of the L5 vertebra. E) It articulates with the ilium at the auricular surface.
How long does each menstruation typically last?
A) 1-2 days B) 3-5 days C) 1-7 days D) 7-10 days E) 14 days
During a race, a long-distance runner twisted his ankle. He finished the race without feeling any pain in his ankle. This lack of the perception of pain could be the result of an increase in ________.
A. epinephrine B. somatotropins C. gonadotropins D. beta endorphins E. lipotropins
Osmosis is the movement of
A. water through a selectively permeable membrane to a solution containing a higher concentration of impermeant solute. B. water through a selectively permeable membrane to a solution containing a lower concentration of impermeant solute. C. molecules from a high concentration to a low concentration. D. ions from a low pressure region to a high pressure region through a selectively permeable membrane.