The idea of saltatory conduction is that along an axon...

The idea of saltatory conduction is that, along an axon, myelinated axon segments ______ while unmyelinated axon segments ________. a. passively spread ionic current; re-initiate the action potential b. re-initiate the action potential; passively spread ionic current

Transcript

00:01 We need to demonstrate understanding of the axon propagation.

00:07 Take note that generally the neural impulses receive the accent hillock sums off to reach the threshold level, which generates the action potential, that the accent heloc and this potential propagates towards the accent terminal.

00:30 Normally, the neuron is at resting membrane.

00:44 So they are in the resting membrane potential of negative 70m and v.

00:54 When excitatory neurotransmitter stimulates posthynaptic neuron, your sodium channels are upend, leading to influx of sodium ions.

01:14 This causes membrane depolarization.

01:23 If this depolarization reaches axon heloc, voltage -gated sodium channels open and axon potential is generated.

01:36 The newly generated action potential propagates down the length of axon.

01:42 This potential would attenuate or diminish as neuronal membrane that contains pores.

01:53 But due to malination of your nerves, the action potential do not diminish leading to effective transmission of signal towards axon terminal.

02:08 So that would be for part a.

02:11 For part b, the action potential, the the action potential jumping from one of ranvier to another node of ranvier is what we call as soltory conduction.

02:29 The nodes of ranvier, so the nodes of ranvier are not covered, they are not covered by meal and sheet, but they contain huge amount of voltage -gated sodium channel.

03:01 Which upon stimulation causes regeneration of action potential again and again leading to jumping of impulses from one node to another this makes the transmission so this makes the transmission of impulses faster if these nodes are not present then the transmission through millinated actions would be to slow also they save energy for the neuron as sodium channels are present only in the notes now for question number two we need to demonstrate understanding of the post synaptic potential for part 8 in question number two take note by exitatory exitatory post synaptic potential in neuromuscular junction is called end plate potential...

Question

The idea of saltatory conduction is that, along an axon, myelinated axon segments while unmyelinated axon segments __. a. passively spread ionic current; re-initiate the action potential b. re-initiate the action potential; passively spread ionic current

Question

The idea of saltatory conduction is that, along an axon, myelinated axon segments ______ while unmyelinated axon segments ________. a. passively spread ionic current; re-initiate the action potential b. re-initiate the action potential; passively spread ionic current

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The idea of saltatory conduction is that, along an axon, myelinated axon segments while unmyelinated axon segments __. a. passively spread ionic current; re-initiate the action potential b. re-initiate the action potential; passively spread ionic current