What is released into the neuromuscular junction to produce a muscle contraction?
a. calcium
b. acetylcholine
c. potassium
d. sodium
e. chloride
ANSWER: b
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Trans fats
A) are unsaturated fatty acids. B) resemble saturated fatty acids in shape. C) are associated with an increased risk of heart disease. D) are present in small amounts in meat and dairy products. E) all of the above
Waters of the continental shelf are generally _______. Choose all that apply (3)
Fill in the blank(s) with the appropriate word(s).
Epiphytes are most closely associated with
Select one: a. tropical rain forests. b. tundra. c. deserts. d. deciduous forests. e. temperate deciduous forests.
Which hormone, secreted by the embryo, is tested for in all pregnancy tests?
A. human chorionic gonadotropin B. follicle-stimulating hormone C. luteinizing hormone D. progesterone E. estrogen