The ________ provides most of the Ca2+ needed for myocardial contraction.
A. mitochondria
B. extracellular fluid
C. cytoskeleton
D. Golgi apparatus
E. sarcoplasmic reticulum
Answer: E
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Tropic hormones
A. function in only one sex. B. stimulate certain endocrine glands to secrete hormones. C. block the actions of hormones that endocrine glands secrete. D. only function in the tropics.
A woman with type A blood bears a child with type O blood. The man she thinks is the father has type B blood. On the basis of ABO blood types, is it possible to prove that he could not be the father?
What will be an ideal response?
What is the mechanism for stopping bleeding called?
A. Negative feedback B. Erythropoiesis C. Hemostasis D. Thrombocytosis E. Vasoconstriction
All of the following structures are found on the tibia except the
A. medial malleolus. B. anterior border. C. lateral malleolus. D. lateral condyle. E. tibial tuberosity.