Table of Contents
- 1 What is the sequence of events from action potential threshold to resting potential?
- 2 What is the sequence of events along an axon that follows a membrane reaching threshold potential?
- 3 What happens at threshold during an action potential?
- 4 Which of the following is the correct sequence in a typical reflex arc?
- 5 What is the threshold of action potential?
- 6 What are the 5 steps of an action potential quizlet?
What is the sequence of events from action potential threshold to resting potential?
The action potential can be divided into five phases: the resting potential, threshold, the rising phase, the falling phase, and the recovery phase. We begin with the resting potential, which is the membrane potential of a neuron at rest.
What is the sequence of events along an axon that follows a membrane reaching threshold potential?
When the membrane potential of the axon hillock of a neuron reaches threshold, a rapid change in membrane potential occurs in the form of an action potential. This moving change in membrane potential has three phases. First is depolarization, followed by repolarization and a short period of hyperpolarization.
What are the 4 steps of an action potential?
An action potential is caused by either threshold or suprathreshold stimuli upon a neuron. It consists of four phases: depolarization, overshoot, and repolarization.
What happens at threshold during an action potential?
An action potential occurs when a neuron sends information down an axon, away from the cell body. When the depolarization reaches about -55 mV a neuron will fire an action potential. This is the threshold. If the neuron does not reach this critical threshold level, then no action potential will fire.
Which of the following is the correct sequence in a typical reflex arc?
Receptors – Spinal cord – Sensory neuron – Motor neuron- Muscle.
Which of the following is the correct sequence for phases of the action potential?
An action potential has three phases: depolarization, overshoot, repolarization.
What is the threshold of action potential?
The action potential is an explosion of electrical activity that is created by a depolarizing current. This means that some event (a stimulus) causes the resting potential to move toward 0 mV. When the depolarization reaches about -55 mV a neuron will fire an action potential. This is the threshold.
What are the 5 steps of an action potential quizlet?
Terms in this set (5)
- Threshold (-55mV)
- Depolarization (inside less negative)
- Resting.
- Repolarization.
- Refractory (hyper-polarization)
What happens when threshold is met?
If threshold is met or exceeded an action potential of a specific magnitude will occur, if threshold is not met, an action potential will not occur. Refractory period: A period of immediately after an action potential occurs when the neuron will resist the production of another action potential.