The general term for blood vessels that carry blood away from the heart is
A) Aorta.
B) Artery.
C) Vein.
D) Atrium.
Answer: B
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Thyroid hormone interacts with its target tissue by
A. increasing I- uptake in the target cells. B. binding to a membrane bound receptor. C. binding to receptor molecules in the nucleus. D. releasing thyroglobulin. E. using the intracellular mediator system.
Which of the following best explains how the phenomenon of "tolerance" develops with use of psychoactive drugs over time?
A. Psychoactive drugs can alter blood flow to the brain. B. Psychoactive drugs often produce euphoria. C. Psychoactive drugs can cross the blood-brain barrier. D. Psychoactive drugs can inhibit production of endogenous neurotransmitters. E. Psychoactive drugs can up-regulate receptors for endogenous neurotransmitters.
Calcitonin
A. promotes the absorption of calcium from the gastrointestinal tract. B. promotes osteoclast activity in the bones. C. reduces calcium excretion by the kidneys. D. reduces extracellular calcium ion levels. E. increases blood calcium levels.
During the third and fourth months,
A. ossification of bones begins. B. mother begins to feel movement. C. still cannot determine the sex of the fetus. D. lanugo covers the body.