The major blood vessels that supply the skin are in the
A. dermis.
B. subcutaneous layer.
C. epidermis.
D. basement membrane.
Answer: A
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The single most important risk for skin cancer is ________
A) genetics B) use of farm chemicals C) race D) overexposure to UV radiation
When trying to diagnose an infection that alters the percentages of leukocyte types found in the blood, it is useful for clinicians to perform a
A. white blood cell differential count. B. red blood cell differential count. C. total cell count for red and white blood cells. D. blood typing.
Answer the following statements true (T) or false (F)
1. Intercalated discs and striations are found in skeletal muscle. 2. Smooth muscle cells possess central nuclei but lack striations. 3. Most connective tissues have regenerative capacity, while most epithelial tissues do not. 4. Squamous cells are flattened and scalelike when mature. 5. Functions of connective tissues include binding, support, insulation, and protection.
In the second-messenger system, what serves as the first messenger?
A) cyclic AMP (cAMP)
B) DNA
C) ATP
D) the hormone
E) mRNA