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
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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
Which of the following plays a principal role in buffering volatile acid ()?
A. Bicarbonate buffer system
B. Inorganic phosphate buffer system
C. Hemoglobin buffer system
D. Plasma protein buffer system
E. Organic phosphate buffer system
The situation of AB>SB means ( )
A. HCO3- retention
B. Excessive HCO3- excretion
CO2 retention
D. Excessive CO2 expiration
E. Fixed acid retention
Which one of the followings is wrong about alteration of cardiovascular function in acidosis? ()
A. decreased venous return
B. decreased cardiac contractility
C. increased peripheral vessel resistance
D. results in cardiac arrhythmia
E. can aggravate microcirculation disturbance
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