The heart pumps approximately ________ milliliters of blood each minute
A) 6,000
B) 15,000
C) 20,000
D) 50,000
E) 100,000
Answer: A
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The right atrium receives blood directly from
A) the pulmonary veins. B) the superior vena cava, inferior vena cava, and coronary sinus. C) the superior vena cava, inferior vena cava, and pulmonary veins. D) the superior vena cava and inferior vena cava only.
To initiate a smooth muscle cell contraction, calcium enters the cell and binds to
A. troponin, which then activates myosin light-chain kinase. B. calmodulin, which then binds to and activates myosin light-chain kinase. C. myosin light-chain kinase, which then hydrolyzes ATP. D. a phosphatase, which then removes the tropomyosin blockade. E. a myosin head, which then activates calmodulin.
Female accessory sex organs develop because of the increase in estrogen from the ovaries during puberty.
Answer the following statement true (T) or false (F)
The _____________is the female reproductive gland that matures the egg/ova.
Fill in the blank(s) with the appropriate word(s).