Which statement about fluids and electrolyte balance is true?
A. Where salt goes, water will follow.
B. The concentration of urine is determined by the amount of water in it.
C. The principal electrolyte in the body is potassium.
D. The volume of urine is determined by the amount of sodium in it.
Answer: A
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The pulmonary semilunar valve separates what parts of the heart?
A. The right atrium and the right ventricle. B. The right ventricle and the pulmonary artery C. The pulmonary trunk and the pulmonary arteries. D. The left atrium and the left ventricle.
Which organ is NOT found in the thoracic cavity?
A) heart B) primary bronchi C) lung D) liver
A break in a bone that is already weakened by some other disease is called a(n) ________ fracture.
A. displaced B. greenstick C. pathologic D. open E. closed
A substance that cannot be broken down into a simpler substance by chemical means is a/an ________.
A. element B. compound C. nucleic acid D. molecule