The organisation of the nervous system:

What do cell mediators 'Histamines' do?

What is myelination:

Diagram of a Motor Neuron:

Function of the Cell body:

Function of the Dendrons and Dendrites:

Function of the Axon:

Function of Schwann Cells:

Function of the Myelin Sheath:

Function of the Node of Ranvier:

What does it mean for a membrane to be Polarised?

What does Resting Potential mean?

The distribution of charges across the axon membrane:

Resting Potential across an axon membrane:

and another diagram:

What is an Action Potential:

The active neruone:

Recovery/Repolarisation:

Diagram of the Action Potential:

The Sodium-Potassium Pump uses Active Transport to move...

During Resting Potential:

When a Stimulus reaches a resting neurone (causing an action potential and depolarisation):

What happens during Repolarisation:

When Resting Potential occurs again:

What is meant by potential difference?

How large is the potential difference across a membrane?

Which side of the membrane has the largest number of positive ions?

Which is found in the highest concentration on the outside of the membrane at rest?

Where do sodium ions go through the Gated-Channel proteins?

Where do potassium ions go through the Gated-Channel proteins?

The arrival of an Action Potential at the end of the presynaptic neurone causes:

What does the influx of calcium ions into the presynaptic neurone cause?

What does the neurotransmitter acteylcholine then do?

What do the sodium ions channels then do?

What does the influx of sodium ions cause?

Acetylcholine is then broken down into choline and ethanoic acid (acetyl) by which enzyme?

What then happens to the products of this reaction?

What then happens to the sodium ion channels in the absence of acetylcholine in the receptor sites:

Synaptic Transmission diagram:

What is summation?

What is spacial summation?

What is temporal summation?

Action Potential - when a stimulus reaches a resting neurone, the following sequence occurs:
1:

2:

3:

Sympathetic nervous system:

Parasympathetic nervous system:

Control of the heart rate:

The difference between myelinated and unmyelinated nerves: