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.Management Sciences
Category: Muscles and Neuromusclar Junction
The end plate potential is characterized by_____________?
A. Propagation
B. All or none law
C. Depolarization
D. Hyper polarization
Non true regarding Na/K pump is______________?
A. Pumps Na against a gradient
B. 5 Na+ exchanged for 2K+
C. Increase in intracellular Na
D. Hypocalcemia inhibits the pump
Tendon (or) ligament is attached to a bone through ____________?
A. Tomes fibers
B. Interstitial fibers
C. Sharpey’s fibers
D. Haversian fibers
The main types of muscle cells are______________?
A. Skeletal and cardiac
B. Smooth and cardiac
C. Smooth and skeletal
D. All of the above
The absolute refractory period of an action potential is due to _______________?
A. Insufficient neurotransmitter
B. Depletion of intracellular Na+
C. Inactivation of Na+ k+ ATPase
D. Voltage inactivation of the Na+ channel
The number of muscle fibers in a motor unit are least in______________?
A. Laryngeal muscles
B. Pharyngeal muscles
C. Muscles of middle ear
D. Extraocular muscles
A motor unit is made up of______________?
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
The study of the electrical activity of the muscle is_______________?
A. EEG
B. EMG
C. Venn diagram
D. ECG
Calcium ions triggers muscle contraction by binding to ___________________?
A. Actin
B. Myosin
C. Troponin
D. Tropomyosin
Which one of the following is a regulatory protein of the muscle ?
A. Troponin
B. Myosin
C. Actin
D. Protein- C
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