A yellow pigment derived from food that can sometimes color the skin is ________.
Fill in the blank(s) with the appropriate word(s).
carotene
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During days 6-13 of the uterine cycle, increased ______ production causes the endometrium to thicken and become vascular and glandular.
A) estrogen B) progesterone C) testosterone D) prolactin E) oxytocin
Thyroid hormone interacts with its target tissue by
A. using the intracellular mediator system. B. binding to a membrane bound receptor. C. increasing iodine uptake in the target cells. D. releasing thyroglobulin. E. binding to receptor molecules in the nucleus.
Athletes who train for endurance rely more on cellular respiration than people who don't train. Their muscle fibers contain more
A. fatty acids. B. water. C. mitochondria. D. lactic acid.
Which of the following is the most reliable form of birth control?
A) the rhythm method B) a douche C) birth control pills D) coitus interruptus E) they are all equally reliable