A buffer will
A. enhance changes in the pH of the solutions.
B. make a solution more acidic.
C. make a solution more basic.
D. have no effect on the pH of the solutions.
E. resist drastic changes in the pH of the solutions.
E
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An extracellular cation whose concentration gradient drives the secondary active transport of many different solutes is
A) sodium. B) calcium. C) potassium. D) chloride. E) glucose.
Compared to skeletal muscle, cardiac muscle ________.
A) has gap junctions that allow it to act as a functional syncytium B) lacks striations C) has more nuclei per cell D) cells are larger than skeletal muscle cells
Osteoporosis is
A. bone inflammation that often results from bacterial infection. B. a group of genetic disorders producing very brittle bones that are easily fractured; this occurs because of insufficient collagen development. C. a disease in adults, especially women, characterized by a reduced amount of bone matrix. D. a disease in adults characterized by softening of bones resulting from calcium depletion. E. a disease in children characterized by soft, bowed, and swollen bones.
The buccinator muscle receives its motor innervation via the
A. buccal branch of the facial nerve. B. lingual nerve. C. inferior alveolar nerve. D. long buccal nerve (of V3).