Medical 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

A. Troponin
B. Myosin
C. Actin
D. Protein- c

A. Contraction of skeletal muscle
B. Decrease of heart rate
C. Secretion of saliva
D. Contraction of pupils

A. Sarcolemma
B. Sarcoplasm
C. Myofibril
D. Endomysium

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

A. To study muscle activity
B. Determine class ii malocclusion
C. Determine the centric relation
D. Determine the centric occlusion

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

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

A. Inhibiting cholinesterase
B. Inhibiting the cns
C. Depolarizing the motor end plate of skeletal muscle
D. Blocking the release of acetyl choline at the end plate

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