Nerves and synapses

Another name for a nerve impulse is...

• Axon

• Action potential

• Axon potential

• Sodium potential

The resting potential is...

• The voltage across the cell membrane when the cell is not sending a signal

• The current across the cell membrane when the cell is not sending a signal

The resting potential is maintained by...

• Sodium gates

• Potassium gates

• Synapses

• The sodium/potassium pump

The first thing that happens when an action potential is sent is...

• Sodium gates close

• Potassium gates close

• Sodium gates open

• Potassium gates open

Repolarisation of the nerve involves

• Opening potassium gates

• Opening sodium gates

In myelinated neurones the signal is faster because

• The signal jumps between Nodes of Ranvier

• There are more sodium gates

• There are more potassium gates

Which number represents the resting potential

• 2

• 3

• 4

• 5

Which number represents depolarisation

• 2

• 3

• 4

• 5

Which number represents repolarisation

• 2

• 3

• 4

• 5

The place where a signal is passed from one nerve cell to another is the...

• neuron

• cell body

• synapse

• gate