Predict what might happen to peripheral resistance in arterioles supplying skeletal muscle when pH levels drop.
A. Vasoconstriction in vessels supplying skeletal muscle
B. Vasodilation in vessels supplying digestive viscera
C. Vasodilation in vessels supplying skeletal muscle
D. No change in the skeletal muscle vessels
Answer: C. Vasodilation in vessels supplying skeletal muscle
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Muscles of the rotator cuff include all of the following except the
A) supraspinatus. B) infraspinatus. C) subscapularis. D) teres minor. E) rhomboid.
If the cardiac output is 4,800 ml/min and the heart rate is 60 beats per minute, the stroke volume averages ____ ml
a. 60 b. 70 c. 80 d. 120 e. 140
Why is the optic disc sometimes called the blind spot of the eye?
A. There are no blood vessels there. B. There are no nerve fibers there. C. There are rods there, but no cones, so color vision is not possible in that area. D. There are no rods and cones there. E. There are cones there, but no rods, so black and white vision is not possible in that area.
Why are an infant's facial bones so small compared with its cranium?
What will be an ideal response?