Muscular dystrophy is characterized by
A. chronic muscle pain.
B. decreased size of muscle fibers.
C. spastic contractions of muscles.
D. replacement of muscle cells by connective tissue.
E. hypertrophy of muscle tissue.
D
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The importance of the plateau phase of the action potential of myocardial cells is in
A) enhancing the efficiency of oxygen use by the cells. B) preventing overstretching of the cells. C) regulating Ca2+ availability to the cells. D) preventing fibrillation. E) preventing tetanus.
The most important muscle(s) of inspiration is (are) the:
a. diaphragm b. external intercostals c. abdominal muscles d. both B and C above
In response to respiratory acidosis, kidneys sacrifice chlorides to reabsorb larger numbers of _____ ions.
A) Sodium B) Magnesium C) Bicarbonate D) Potassium E) Chloride
If the sequence of DNA nucleotides being read is TTACTG, then transcription results in the formation of the sequence
A. TTUGUC. B. TTACTG. C. GTCATT. D. AAAGGG. E. AAUGAC.