Category: Muscles and Neuromusclar Junction

A. Na effux
B. Na influx
C. K efflux
D. K influx

A. Adaptation
B. Accommodation
C. Refractoriness
D. Electrotonus

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

A. Propagation
B. All or none law
C. Depolarization
D. Hyper polarization

A. Pumps Na against a gradient
B. 5 Na+ exchanged for 2K+
C. Increase in intracellular Na
D. Hypocalcemia inhibits the pump

A. Tomes fibers
B. Interstitial fibers
C. Sharpey’s fibers
D. Haversian fibers

A. Skeletal and cardiac
B. Smooth and cardiac
C. Smooth and skeletal
D. All of the above

A. Insufficient neurotransmitter
B. Depletion of intracellular Na+
C. Inactivation of Na+ k+ ATPase
D. Voltage inactivation of the Na+ channel

A. Laryngeal muscles
B. Pharyngeal muscles
C. Muscles of middle ear
D. Extraocular muscles

A. A flexor muscle and an extensor muscle
B. A single skeletal muscle and all the motor peurons that supply it
C. A single motor neuron and all the muscle fibers it innervates
D. All the motor neurons in which response are observed after maximal stimulation of a single sensory nerve