Table of Contents
- 1 What period of repolarization of the neuron during which it Cannot respond to a second stimulus?
- 2 When sodium ions rush into neuron and reverse the resting charge it is called?
- 3 What restores the ion conditions in and outside a neuron?
- 4 What happens during repolarization of a neuron?
- 5 What happens during depolarization of a neuron?
What period of repolarization of the neuron during which it Cannot respond to a second stimulus?
chapter 7 -1
| Question | Answer |
|---|---|
| Period of repolarization of the neuron during which it cannot respond to a second stimulus | Refractory period |
| State in which the resting potential is reversed as sodium ions rush into the neuron | Depolarization |
| Electrical condition of the plasma membrane of a resting neuron | Polarized |
What is the period of repolarization?
The repolarization phase of an action potential initially results in hyperpolarization, attainment of a membrane potential, termed the afterhyperpolarization, that is more negative than the resting potential. Repolarization usually takes several milliseconds.
When sodium ions rush into neuron and reverse the resting charge it is called?
The action potential has three main stages: depolarization, repolarization, and hyperpolarization. Depolarization is caused when positively charged sodium ions rush into a neuron with the opening of voltage-gated sodium channels.
When the charge is reversed in a neuron during an action potential is called?
A nerve impulse is a sudden reversal of the electrical charge across the membrane of a resting neuron. The reversal of charge is called an action potential. As a result, the action potential jumps along the axon membrane from node to node, rather than spreading smoothly along the entire membrane.
What restores the ion conditions in and outside a neuron?
Electrical condition of the plasma membrane of a resting neuron. The chief positive intracellular ion in a resting neuron. Sodium-potassium pump. Process by which ATP is used to move sodium ions out of the cell and potassium ions back into the cell; completely restores the resting conditions of the neuron.
Which of the following periods of time are the ventricles unable to respond to a stimulus?
1 . The absolute refractory period is defined as the period of time that the myocardial cell is unable to generate an action potential in response to another electrical impulse.
What happens during repolarization of a neuron?
During repolarization of a neuron, sodium channels close and potassium rushes out of the cell to temporarily re-establish the membrane potential. sodium channels close and potassium rushes out of the cell to temporarily re-establish the membrane potential.
What ions rush into the neuron during depolarization?
When the positive potential becomes greater than the threshold potential, it causes the opening of sodium channels. The sodium ions rush into the neuron and cause the shift in membrane potential from negative to positive. These neurotransmitters, in turn, cause the depolarization of postsynaptic neurons.
What happens during depolarization of a neuron?
During depolarization, the membrane potential rapidly shifts from negative to positive. As the sodium ions rush back into the cell, they add positive charge to the cell interior, and change the membrane potential from negative to positive.
What happens to a neuron during depolarization?
Depolarization occurs when a stimulus reaches a resting neuron. During the depolarization phase, the gated sodium ion channels on the neuron’s membrane suddenly open and allow sodium ions (Na+) present outside the membrane to rush into the cell. As a result, the inner portion of the nerve cell reaches +40 mV.