Which of the following is responsible for secondary sex characteristics in females?
A) estrogens
B) progesterone
C) follicle-stimulating hormone (FSH)
D) human chorionic gonadotropin (hCG)
E) testosterone
A
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Glucagon is synthesized by the ________ cells of the pancreas.
Fill in the blank(s) with the appropriate word(s).
Intracellular signaling pathways within target cells are organized such that
A. each step allows for amplification of the signal where one molecule can activate many. B. each step involves one molecule activating or synthesizing exactly one other molecule for precise control. C. enzymes are used up and degraded after each individual reaction they catalyze.
Which of the following statements is true regarding objects projected from the same level as they land?
A. time up and time down are equal B. angle of decent is equal to angle of takeoff C. both A & B D. all of the above
A ________ pattern is the tendency for animals to eliminate wastes in a particular location
Fill in the blank(s) with correct word