题目内容

The initial length of skeletal muscle is determined by ___. ()

A. passive tension
B. preload
C. afterload
D. the difference between the preload and the afterload
E. the sum of the preload and the afterload

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Whether skeletal muscle can produce the tetanus or not is determined by ___. ()

A. the types of stimulation
B. intensity-time ratio
C. stimulation frequency
D. stimulating time
E. stimulation intensity

The terminal cisternae of sarcoplasmic reticulum in skeletal muscle can store ___. ()

A. Na+
B. K+
C. H+
D. Cl-
E. Ca2+

Plasma crystal osmotic pressure is mainly composed of ___. ()

A. NaCl
B. Albumin
C. Globulin
D. Fibrinogen
E. glucose

The blood volume of a normal man is about ___ of his body weight. ()

A. 5%~6%
B. 6%~7%
C. 7%~8%
D. 8%~9%
E. 9%~10%

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