If a fair-skinned person is outside on a hot sunny day, why does his or her skin turn red?
A) The blood flow to the skin increases.
B) The number of red melanocytes in the skin increases.
C) Melanocytes increase production of red pigments.
D) Carotene production greatly increases.
E) Decreased heat causes the skin to turn red.
A
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The walls of lymphatic capillaries are only one cell thick.
Answer the following statement true (T) or false (F)
Which is TRUE about the condition anemia?
A. It can be caused by too little iron in the diet. B. It results in reduced oxygen-carrying capacity of the blood. C. It can be caused by abnormal hemoglobin. D. It can be caused by kidney failure. E. All of the answers are true.
Smoking is a major risk factor for autoimmune diseases.
Answer the following statement true (T) or false (F)