According to the sliding-filament theory, which of the following statements i A.

Question

According to the sliding-filament theory, which of the following statements i A. Calcium is required to disengage the interactions between B. Thin filaments move away from the M-line C. Skeletal musc D. Thick filaments rema E. ATP myosin & actin molecules le contractions will always occur since these contractions do not require ATP in stationary (or do not move) during cross-bridge formation is required to interact with troponin before myosin& actin molecules can interact with one Which of the following responses is caused by a release of ENDOTHELIN-1 A. Vasodilation B. Vasoconstriction C. Vasodilation D. A& B E. A, B&C; at low concentration; vasoconstriction at high concentration The ELATEAL phase of acion potentials from pacemaker cellis mainained y_ by s from pacemaker cells is maintained A. sodium influxes B. chloride effluxes C. potassium influxes D. bicarbonate effluxes E. calcium influxes Which of the following would be produced by the LOWEST frequency of stimulation? A. Unfused tetanus B. Summation C. Twitch D. A& B E. A, B&C; Which of the following is a benefit resulting from a EEVER? A. B. C. D. E. Activities of interleukin-1 (IL-1) are decreased Production of cytokines is prevented Tachycardia is induced (or promoted) Production of interferons is inhibited Activities of transferrins are increased Axons of UPPEB motor neurons are contained within A. pyramidal tracts B. cranial& spinal nerves C. spinothalamic pathways D. A&B; E. A, B&C; Pacinian corpuscles respond to stimuli by generating_potentials A. excitatory postsynaptic B. generator C. action D. receptor E. inhibitory postsynaptic Which of the following factors affects the force generated by WHOLE skeletal muscles? A. Recruitment B. Size principle C. Presence of gap junctions D. A& B E. A, B&C;

Explanation / Answer

Ans-1

A Calcium is required to engage interaction b/w actin and myosin

B Thin filament move towards M-line

C Skeleton muscles always require ATP and calcium for muscle contraction

E Calcium is required to interact with troponin

So (D) option is correct

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