In the following chemical reaction, what is NaCl?
NaOH + HCl ? NaCl + H2O
A) water B) reactant C) acid D) product
Answer: D
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Which of the following is the receptor in skin that detects pain?
a. Krause’s end bulb b. pacinian corpuscle c. Meissner’s corpuscle d. free nerve endings
Which of the following is associated with osteoclast reabsorption of bone?
A. Calcium ions are actively transported from blood to bone matrix. B. The protein components of bone matrix are synthesized. C. Osteoblasts form collagen and proteoglycans. D. Blood calcium is decreased. E. Hydrogen ions form an acid environment in bone matrix.
The most effective chemical buffer in ECF is
a. hemoglobin. b. peptide buffers. c. carbon dioxide-bicarbonate buffers. d. phosphate buffers. e. Lactate buffers.
Which would NOT be caused by a decrease in plasma Ca2+ levels in an otherwise normal person?
A. an increase in plasma parathyroid hormone levels B. an increase in plasma 1,25-dihydroxyvitamin D3 levels C. an increase in nerve and muscle excitability D. a decrease in the filtered load of Ca2+ E. an increase in bone density