Spinal nerves exiting the cord from the level of L4 to S4 form the
A. lumbar plexus.
B. femoral plexus.
C. sacral plexus.
D. pelvic plexus.
E. brachial plexus.
C
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What amount of milk is made up of water?
a. 50% c. 99% b. 65% d. 87%
The left border of the heart is formed by the
A) left atrium and right atrium. B) right atrium and right ventricle. C) left atrium and left ventricle. D) right ventricle and left ventricle. E) None of the answers is correct.
What provides a hard, continuous surface for the epidermis of the cutaneous membrane?
A) collagen B) keratin C) mucus D) cilia
When carotid and aortic baroreceptors reduce their output,
A) heart rate increases. B) heart rate decreases. C) stroke volume increases. D) both heart rate and stroke volume increase. E) the heart rate will decrease to lower blood pressure.