A. Troponin
B. Myosin
C. Actin
D. Protein- C
Which one of the following is a regulatory protein of the muscle ? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs 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
Skeletal muscles_____________? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs A. Extracellular Ca+2
B. Sarcoplasmic ca+2
C. Extracellular Na+
D. Intracellular Na+
Cardiac muscle contracts due to______________? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs A. Inhibitory post synaptic potential
B. Miniature end plate potential
C. Action potential
D. End plate potential
A. Net current in an outward direction
B. Cell interior becomes more negative
C. Cell interior becomes less negative
D. None of the above
Upstroke of action potential would lead to________________? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs A. Skeletal and cardiac
B. Smooth and cardiac
C. Smooth and skeletal
D. All of the above
The main types of muscle cells are______________? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs A. white and brown
B. White and yellow
C. White and gray
D. White and red
Two major types of muscle fibres are found in humans_____________? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs A. Insufficient neurotransmitter
B. Depletion of intracellular Na+
C. Inactivation of Na+ k+ ATPase
D. Voltage inactivation of the Na+ channel
The absolute refractory period of an action potential is due to _______________? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs A. Adaptation
B. Accommodation
C. Refractoriness
D. Electrotonus
A. Laryngeal muscles
B. Pharyngeal muscles
C. Muscles of middle ear
D. Extraocular muscles
The number of muscle fibers in a motor unit are least in______________? Read More »
Medical Mcqs, Muscles and Neuromusclar Junction, Physiology Mcqs