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.Management Sciences
Category: Muscles and Neuromusclar Junction
All are features of skeletal muscle except______________?
A. Cylindrical
B. Transverse striation
C. Centrally placed nuclei
D. Multiple nuclei
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
The neuromuscular transmitter released at neuromuscular junction is_______________?
A. Dopamine
B. Epinephrine
C. Nor epinephrine
D. Acetylcholine
Upstroke of action potential would lead to________________?
A. Net current in an outward direction
B. Cell interior becomes more negative
C. Cell interior becomes less negative
D. None of the above
The following electrodes are used to detect the muscle activity without pain_________________?
A. Surface electrode
B. Round electrode
C. Hook electrode
D. Needle electrode
Small packets of acetylcholine released randomly from the nerve cell membrane at rest Produces_______________?
A. Inhibitory post synaptic potential
B. Miniature end plate potential
C. Action potential
D. End plate potential
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
Increase in threshold level on applying subthreshold, slowly rising stimulus is known as ___________?
A. Adaptation
B. Accommodation
C. Refractoriness
D. Electrotonus
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
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