Action Potential

Description

A-Levels Biology Flashcards on Action Potential, created by Elizabeth Westmacott on 12/06/2013.
Elizabeth Westmacott
Flashcards by Elizabeth Westmacott, updated more than 1 year ago
Elizabeth Westmacott
Created by Elizabeth Westmacott over 11 years ago
33
1

Resource summary

Question Answer
A stimulus is received causing... ...some sodium voltage gated channels to open.
Sodium ions... ...diffuse into the axon through these channels.
Sodium ions are... ...positively charged.
They reverse... ...the potential difference across the membrane.
As the sodium ions diffuse into the axon... ...more sodium channels open.
The membrane is depolarised and now... ... the voltage-gated sodium ion channels close.
The voltage gated potassium ion channels... ...open and potassium ions diffuse out of the axon.
The axon is... ...repolarised.
The inside of the axon becomes more negative than usual... ...which is known as hyperpolarisation.
The potassium ion channels close and the sodium-potassium pumps... ...cause sodium ions to be pumped out and potassium ions in.
The... ...resting potential is re-established.
Show full summary Hide full summary

Similar

Biology AQA 3.1.3 Cells
evie.daines
Biology AQA 3.2.5 Mitosis
evie.daines
Biology AQA 3.1.3 Osmosis and Diffusion
evie.daines
Biology- Genes, Chromosomes and DNA
Laura Perry
Biology- Genes and Variation
Laura Perry
Enzymes and Respiration
I Turner
GCSE AQA Biology - Unit 2
James Jolliffe
GCSE AQA Biology 1 Quiz
Lilac Potato
Using GoConqr to study science
Sarah Egan
Cells and the Immune System
Eleanor H
GCSE Biology AQA
isabellabeaumont