Which of the followings is the effect of hypokalemia on physiological characteristics of myocardium? ()
A. excitability of myocardium is reduced
B. conductibility of myocardium is decreased
C. automatic rhythmicity of myocardium is decreased
D. contractibility of myocardium is reduced
E. both excitability and conductibility of myocardium are decreased
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Severe acute hyperkalemia may cause flaccid paralysis. The reason is ()
A. hyperpolarization blocking
B. partial depolarization
C. the sodium channels are open
D. depolarization blocking
E. slow sodium channels are closed
Hyperkalemia can cause the following results except for ()
A. ventricular fibrillation
B. paralysis of skeletal muscle
C. metabolic acidosis
D. acidic urine
E. tall and peaked T wave in ECG
Which of the followings is the effect of hyperkalemia on membrane electrical potential of skeletal muscle? ()
A. increased negative value of RMP of skeletal muscle
B. decreased negative value of RMP of skeletal muscle
C. decreased negative value of TMP of skeletal muscle
D. increased negative value of TMP of skeletal muscle
E. a decrease both RMP and TMP of skeletal muscle
Which of the following descriptions is incorrect? ( )
A. Under the condition of usual diet, body mainly produces acid substances
B. The salts of organic acid contained in vegetables and fruits are the main source of fix acid
C. Ammonia produced by metabolism is alkali (base)
D. The more protein one ingests, the more fix acid is produced
E. Ketone body includes volatile component
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