Put the following steps of muscle contraction in...

Put the following steps of muscle contraction in order. Impulse travels from sarcolemma down the transverse tubules to the sarcoplasmic reticulum...causing the calcium channels in the sarcoplasmic reticulum Calcium ions diffuse into the cytosol and bind to troponin molecules New ATP binds to myosin breaking its connection to actin ATP splits providing it with the power to cock the myosin heads and store energy for the next power stroke Tropomyosin molecules move and expose actin Myosin binds to actin forming cross-bridges ADP and P release from myosin and pull thin filament Motor neuron releases acetylcholine which binds to receptors in the muscle fiber membrane T/F All types of muscle are voluntarily controlled. Select one: True False

Transcript

00:01 Hello students, today will be solving a question in biology.

00:04 As you can see from the question, they set us to arrange the following options in which how muscle contraction occurs in our body.

00:11 Okay.

00:12 So the muscle contraction in human body occurs via a theory called as sliding filament theory.

00:23 So in our accordance to sliding filament theory, arrange the following options.

00:30 So sliding filament theory explains.

00:31 How the muscles move and sliding of thin filaments over the thick filaments causes muscle contraction okay so sliding filament theory says that the sliding of filaments okay the sliding of filament's thin filaments sliding over thick filaments is responsible for muscle contraction the sliding of thin filaments over thick filaments is responsible for muscle contraction.

01:15 So the entire process of sliding filament theory begins from central nervous system.

01:23 The entire process of sliding filament theory begins from central nervous system.

01:31 So central nervous system via motor neuron in muscle fibers reach spaces between motor neuron and sarcolema.

01:38 So basically central nervous system via motor neurons the impulse reaches a space between motor neuron and sarco lemma.

01:52 So the space between a motor neuron and sarco lemma is called as neuromuscular junction.

02:09 Okay, neuromuscular junction.

02:14 So the impulse is felt in neuromuscular junction.

02:18 The motor neuron, then in neuromuscular junction, generates action potential and secretes acetylcholine.

02:27 Okay, the motor neuron in neuromuscular junction undergoes action potential to release acetylcholine, which is our first neurotransmitter.

02:41 So the first step that's occurring is motor neuron releases acetylcholine binding to receptors in muscle fiber membrane.

02:51 And this muscle fiber membrane is nothing but our motor unit...

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