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.
Answer: A
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Which of the following is true about hormones?
a. are released from exocrine glands. b. interact with receptors at target-cell sites. c. are synthesized in the lymph nodes. d. interact with receptors in the blood. e. are all similar chemically.
The azygos system of veins drains blood from abdominal structures.
Indicate whether the statement is true or false.
Small signals at a synapse that can add together are called
A. graded potentials. B. kinetic potentials. C. action potentials. D. receptor potentials. E. resting potentials.
If John has O positive blood, he will have which of the following antibodies in his blood?
A. Anti-Rh B. Anti-A C. Anti-B D. Both anti-A and anti-B