triggers the binding of myosin to actin

increases the action potential along the sarcolemma

What is a crossbridge?

Where the calcium crosses into the cytoplasm

Where calcium binds with troponin

Identify what occurs during the Sliding Filament Model. (check all that apply)

When the nervous system stimulates muscle fibers, the myosin on the thick filaments latch onto actin of thin filaments to begin sliding.

The attachment forms and breaks multiple times during a muscle contraction to generate tension and propel thin filaments toward center of sarcomere.

All sarcomeres in the cell slide simultaneously to make the muscle cell shorten.

The myosin on the thin filaments latch onto actin of thick filaments to begin sliding.

Which change do you observe during a muscular contraction shown in the images?

Distance between Z discs shortened

An Action Potential in the muscular system is essentially....(select 2)

the biochemical communication between a motor neuron and the muscle it controls.

a sequence of events of chemicals communicating with other chemicals to trigger a muscle contraction.

the denaturation of Acetylcholine to relax a muscle and stop a contraction.

the contraction of muscles shortly after death due to the unavailability of ATP and excess of Calcium.

The sliding filament theory of muscle contraction says

Actin filaments slide over myosin filaments, making the muscle shorter

Actin and myosin filaments condense, thus causing the filament to shorten which in turn shortens the muscle

Myosin rotates and wraps actin around it making the muscle shorter

Friction is reduced between thin and thick filaments causing the thick filaments to move inside the thin

Sliding Filament Model of Contraction

Quiz

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10th - 12th Grade

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Practice Problem

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Danielle Fridstrom

Used 27+ times

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troponin-tropomyosin

none of these

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Sliding Filament Model of Contraction

34 questions

Calcium binds to ___of the troponin-tropomyosin complex.

___are regulatory proteins that cover the myosin binding site on the actin.

___are thin filaments.

___are thick filaments.

Calcium is stored in the ___.

A ___extends from one Z disc to another Z disc.

___gets shorter during contraction.

___forms a crossbridge with actin.

___provides energy for muscle contraction and relaxation.

___slides inward during muscle contraction.

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