Vasoconstriction is the result of the contraction of smooth muscle of the
A) Tunica intima.
B) Tunica media.
C) Tunica externa.
D) Tunica lumena.
Answer: B
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Athletes abuse erythropoietin (EPO) because this hormone
A. increases the number of red blood cells. B. increases the number of white blood cells. C. decreases the number of red blood cells. D. adds protein to plasma.
The three major subdivisions of extracellular fluid found in the body are plasma, interstitial fluid, and
A) synovial fluid. B) urine. C) sweat. D) lymph. E) serous fluid.
Place the following in correct sequence from simplest to most complex:
1. molecules 2. atoms 3. tissues 4. cells 5. organs A) 1-2-4-3-5 B) 2-1-4-3-5 C) 1-2-3-4-5 D) 2-1-3-4-5
Dendritic cells of the skin are derived from
A. T-lymphocytes. B. neutrophils. C. macrophages. D. monocytes. E. B-lymphocytes.