Which is wrong about the structure of a sarcomere?
A. (A) thick filament is made of myosin
B. (B) thin filament is made of actin
C. (C) bridge is formed by contacting actin and myosin tail
D. (D) sarcomere is the unit of myofibril
查看答案
Which is released from the sarcoplasmic reticulum during muscle contraction?
A. (A) potassium
B. (B) sodium
C. (C) chloride
D. (D) calcium
Which two brain areas are important in adaptation of posture?
A. (A) medulla and nucleus ambiguus
B. (B) hippocampus and basal ganglia
C. (C) prefrontal cortex and thalamus
D. (D) basal ganglia and cerebellum
Which is the function of postural orientation?
A. (A) anticipates disturbances to balance
B. (B) interprets sensations
C. (C) optimizes execution of tasks
D. (D) all of the above
Which is not a required action for upright stance?
A. (A) maintaining support against gravity
B. (B) maintaining balance
C. (C) maintaining orientation
D. (D) none of the above
微信支付 
支付宝支付