When a neurone is stimulated an action potential is generated by a change in ion concentrations across the cell membrane. The resting membrane potential (the potential of charge across the membrane …

Describe and explain how an action potential is generated (6 marks) The membrane is at resting potential, -60mV inside compared to outside. It is polarised. 2. Na+ ion channels open and some Na+ …

An action potential occurs when the membrane depolarises to a certain threshold, if this threshold is not reached the action potential will not be triggered. This is referred to as the all-or-nothing principle in …

How is an action potential generated? A nerve cell when at rest is negatively charged, this means that on the inside it is more negative than on the outside. The potential difference is around -70mV. The …

This process is repeated, allowing the action potential to propagate rapidly along the axon, effectively ‘ jumping ’ between nodes. This ‘jumping’ mechanism is known as saltatory conduction. It minimises …

An action potential begins when voltage gated sodium ion channels, known as Na (V) channels open. This leads to an influx of sodium ions (moving down their concentration gradient), and the cell …

An action potential is the propagation of the reversal of charge across a membrane voltage gated Na+ ion channels sense a change in membrane potential causing the...

Explain how an action potential is generated At rest the neuron has a charge of -70mV, this is called the resting membrane potential and is caused by different concentrations of ions inside and out of the cell.

Describe:· Random or small amount of sodium ions enter the axon (diffusion) which leads to a slight depolarisation of the membrane· Down the concentration gradient (more sodium outside the cell than …

Describe how an action potential is generated. The generation of an action potential occurs in 4 main steps (resting potential, depolarisation, repolarisation and hyperpolarisation). At resting potential, the …