The top long-distance runners probably have ________ proportion of slow muscle fibers in their leg muscles.
A. the same
B. a higher
C. a lower
Answer: B
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The reason much of the blood in the fetal right atrium is shunted to the left atrium through the foramen ovale is
A. the blood pressure in the left atrium is greater than in the right atrium. B. the fetus is in an antigravity situation provided by the amnionic fluid. C. there is a valve that directs the blood that way. D. the umbilical arteries have valves. E. the blood pressure in the right atrium is greater than in the left atrium.
Which of the following are triggers for ion channels to open?A) Ligand bindingB) Change in membrane potentialC) Stretching of membraneD) Movement of solutes across the membraneE) Change in water molecule concentration
What will be an ideal response?
Damage to the central portion of the temporal lobe is most likely to cause deficits in ________.
Fill in the blank(s) with the appropriate word(s).
A function of tropomyosin is
a. bind Ca2+. b. form attachments with myosin cross bridges. c. prevent myosin cross bridges from attaching to the thin filaments. d. serve as an ATPase. e. none of these answers.