Which of These Statements Is Correct Regarding Muscle Contraction

The cross-bridge cycle refers to the sequence of events between the time an individual cross bridge binds to a thin filament at the start of a muscle contraction and the time the cross bridge releases the filament at the end of the contraction. Which of these statements is correct regarding muscle contraction A All motor.

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The middle of A-band is paler zone called as H-band.

. The A band remains of same length. Which of these statements is correct regarding muscle. I band is divided in the center by dense and narrow linesA-band is formed by thick filaments of myosin.

O When a muscle contracts the sarcomere remains the same size. During muscle contraction chemical energy is converted into mechanical energy. Biology questions and answers.

Excitation-contraction coupling refers to the binding of energized myosin to actin. Pages 101 This preview shows page 11 - 14 out of 101 pages. A rise in intracellular Ca2allows actin to interact with myosin.

B myosin pushes actin filaments toward the Z disk. C actin pulls myosin toward the Z disk. When a muscle contracts the H-zone becomes narrower shortens.

Calcium removal from the cytoplasm causes contraction. This is a bundle of axons found in the peripheral nervous system. Phosphocreatine transfers phosphate group to ADP to create ATP required for muscle contraction.

Hence correct answer is A Was this answer helpful. The sliding filament theory explains how muscles contract. Thus the correct answer is option C.

Thick filaments shorten when. School Valencia Community College. The thick and thin filaments remains in their original length and the sarcomere shortens only.

1 See answer Advertisement. During contraction the thick filaments are pulled towards the center of the sarcomere. The connective tissue present in muscle is epimysium.

Contracting muscle fibers do not always shorten. Calcium entry into the cytoplasm causes relaxation. This causes depolarisation of the sarcolemma and results in the contraction of the muscle fibre.

The sequence of events in the contraction of muscle fibre is as follows. E All of the answers above are correct. Muscle contraction generates force by pulling on the structures it is.

1 See answer Add answer 5 pts. This part of the autonomic system increases digestion. Which of the following statements regarding muscle contractions is NOT true.

Mechanical energy is converted into chemical energy. Correct option is D The myofibril consists of both thick and thin bandsThe thick and is known as a dark band. The correct option is A.

Contraction only occurs following summation of action potentials from many motor neurons. The contraction of the muscle fiber do not means that the muscle fiber gets shorten. Which of the following statements is true regarding muscle contraction.

D actin pushes myosin toward the M disk. Actin and myosin together forms actomyosin which constitutes a myofibril. Course Title BSC 2093.

When a muscle contracts the lighter I-band becomes wider. The basic contractile unit of muscle is sacromere. Correct option is A When the muscle contracts according to sliding theory The distance between two Z lines is reduced.

Portage Learning - FINAL BIOD 152 Spring 2022. During muscle contractions actin filaments slide over myosin filaments resulting in. Which of the following statements is true regarding muscle contraction.

Which of these statements is correct regarding muscle contraction. A and D are correct. Cardiac myocytes are terminally differentiated.

Expert Answer Correct answer- D Cardiac myocytes are termina. Length of A-band remains constant is the correct statement for muscle contraction. Which of these statements is correct regarding muscle contraction.

When a muscle contracts the A-band shortens. Muscle is made of soft tissues that contains actin and myosin protein filaments which are responsible for muscle contraction. 1 Point Which statement is NOT true regarding muscle contraction.

During muscle contraction A myosin pulls actin filaments toward the M disk. A ATP is needed for the thick filament to bind to the thin filament B Acetylcholine is the neurotransmitter that binds to the sarcolemma Tropomyosin protein covers the binding sites for the thick filament on the actin protein The. When a muscle contracts the A-band shortens.

When a muscle contracts the lighter I-band becomes wider. - 14398069 bellegonz8751 bellegonz8751 07052021 Science Elementary School answered Which of these statements is correct regarding muscle contraction. When an impulse arrives at the end plate of an axon the vesicles therein release acetylcholine which diffuses across the nerve-muscle gap binds to receptors on the sarcolemma and increases the permeability of sarcolemma to sodium ions.

The contraction of the skeletal muscle fiber helps in the movement of the body. The H zone that contains only thick filaments also gets shorten in length. It is split into H-zone A-band I-band M line and Z line.

The correct option is A. Contraction does not always require the occurrence of an action potential. Contraction of cardiac muscle results from lengthening of sarcomeres.

The thin band is I band. Ca2 entry across the plasma membrane is important in sustaining the contraction of skeletal muscle. Muscle contraction is the activation of tension- generating sites within muscle fibres.

The correct answer is option 3 ie It involves release of Ca from sarcoplasmic reticulum SR and pumping Ca back in SR. When a muscle contracts the sarcomere remains the same size. Muscle fiber contraction is all or none.

The I band the contains thin fibers also shortens. Which statement is true regarding muscle contraction. When a muscle contracts the H-zone becomes narrower shortens.

The mitochondria act as a store of Ca2 for the contractile process.

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