Constriction and dilation of smooth muscle in ________ is used to control blood pressure.
A. venules
B. capillaries
C. arterioles
D. arteries
Answer: C
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Blood is correctly classified as a(n)
A. intracellular fluid. B. organ system. C. tissue. D. organ.
The sympathetic nervous system
a. releases NE from most of its preganglionic neurons b. has some postganglionic fibers that release acetylcholine c. has preganglionic neurons that originate in the thoracic and lumbar regions of the spinal cord d. has characteristics a and b e. has characteristics b and c
Match the endocrine gland with the hormone it secretes.A. GlucagonB. ProgesteroneC. CortisolD. T3E. ProlactinAdrenal cortex
Fill in the blank(s) with the appropriate word(s).
Fontanelles persist into adulthood, but are usually gone by age 50.
Answer the following statement true (T) or false (F)