The feeling of pain on the body surface that has its origin in an internal organ is called
A. visceral pain.
B. nociception.
C. proprioception.
D. referred pain.
Answer: D
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What is the structural unit of compact bone?
A) the osteon B) lamellar bone C) osseous matrix D) spongy bone
Which of the choices below exerts primary control over sodium levels in the body?
A) glucocorticoids B) aldosterone C) water levels D) ADH
Magnesium atoms have two electrons in their outermost shells, and chlorine atoms have seven. The compound magnesium chloride would contain
A) 1 magnesium and 1 chlorine. B) 1 magnesium and 2 chlorine. C) 2 magnesium and 1 chlorine. D) 2 magnesium and 7 chlorine. E) It is impossible to determine without more information.
Which layer of a blood vessel contains concentric sheets of smooth muscle tissue?
A) tunica intima B) external elastic membrane C) tunica media D) internal elastic membrane E) tunica externa