Which of the following statements is false multiple choice a...

Which of the following statements is false? Multiple Choice A motor unit includes specific muscle fibers (cells) that are innervated by multiple motor neurons. A motor unit Includes a single multipolar neuron. Multiple motor units allow movement in an entire named muscle (ex. biceps brachii of the arm). A motor unit includes specific muscle fibers (cells) that are innervated by a single motor neuron. Which of the following statements is false? Multiple Choice A motor unit includes a single multipolar neuron Multiple motor units allow movement in an entire named muscle (ex. biceps brachii of the arm) A motor unit includes specific muscle fibers (cells) that are innervated by a single motor neuron.

Transcript

00:01 In this question we will be talking about the signaling that takes place in the motor neurons.

00:06 So basically let us say this here is our cell which is present in the resting stage.

00:14 So in resting stage there is negative charge in the inside of the cell due to the potassium ion that is present and there is sodium ion outside the cell due to which there is this positive charge present.

00:30 So at the resting phase the cell is said to be polarized.

00:34 So when a stimulus arises there will be opening of the sodium channel and then sodium will enter inside the cell.

00:42 So now due to this the cell will become depolarized and due to which the action potential will be generated.

00:51 Now when the action potential is generated so in the presynaptic neuron there will be opening of the calcium channel.

01:00 So calcium will enter inside due to which the synaptic vesicles will fuse with the plasma membrane of this presynaptic neuron and the neurotransmitters will be released in the post synaptic cleft that is the space between the presynaptic neuron as well as this post synaptic neuron.

01:23 So on the post synaptic neuron there are the receptors present and this neurotransmitter will bind to this receptor and then the further signaling will take place like the sodium can enter here and will cause the depolarization of the cell and then further the signal will take place.

01:41 So here option a says that in a resting motor neuron the sodium is more concentrated outside the cell.

01:48 So that is true as here we have seen that there is positive charge due to the presence of sodium ion outside.

01:56 Then option b says that the axon of a women motor neuron contains an insulating material that is called the myelin.

02:06 So this is also true here...

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