In excitable cells, repolarization is closely associated with, one of the following events_______________?
A. Na effux
B. Na influx
C. K efflux
D. K influx
All are features of skeletal muscle except______________?
All are features of skeletal muscle except______________?
A. Cylindrical
B. Transverse striation
C. Centrally placed nuclei
D. Multiple nuclei
Rigor mortis results after death is due to________________?
Rigor mortis results after death is due to________________?
A. Failure of acetylcholine to diffuse
B. Failure of ATP supply
C. Failure of break down of calcium bridges
D. None of the above
The skeletal muscle action potential______________?
The skeletal muscle action potential______________?
A. Is not essential for contraction to occur
B. Has a prolonged plateau phase?
C. Spreads in ward to all parts of the muscle via the t- tubule system
D. Begins with an, in ward movement of K+ ins
Electromyography is used for________________?
Electromyography is used for________________?
A. To study muscle activity
B. Determine class II malocclusion
C. Determine the centric relation
D. Determine the centric occlusion
Skeletal muscles______________?
Skeletal muscles______________?
A. Contracts when calcium is taken up by sarcoplasmic reticulum
B. Contracts when actin and myosin filaments shorten
C. Contraction is initiated by calcium binding to troponin
D. Contraction is initiated by calcium binding to tropomyosin
The contractile element in a skeletal muscle is present in______________?
The contractile element in a skeletal muscle is present in______________?
A. Sarcolemma
B. Sarcoplasm
C. Myofibril
D. Endomysium
Synagogue is place of worship of which religion?
Synagogue is place of worship of which religion?
A. Confucianism
B. Judaism
C. Shintoism
D. Buddhism
Which is caused by acetylcholine through nicotinic receptors_____________?
Which is caused by acetylcholine through nicotinic receptors_____________?
A. Contraction of skeletal muscle
B. Decrease of heart rate
C. Secretion of saliva
D. Contraction of pupils
Which one of the following is a regulatory protein of the muscle ?
Which one of the following is a regulatory protein of the muscle ?
A. Troponin
B. Myosin
C. Actin
D. Protein- C