Revision

Question 1

Resting Potential

Answer 1

Na+ cannot enter, or is actively pumped out of, the

neuron; the cell is negatively charged

Question 2

Depolarisation

Answer 2

Na+ enters dendrites and cell body, making the cell less

negatively charged

Question 3

Graded potential

Answer 3

Change in cell voltage is passed down dendrites and cell

body

Question 4

action potential

Answer 4

If the change in axon voltage surpasses a threshold, the

axon suddenly lets in a surge of Na+

Question 5

neurotransmitter release

Answer 5

The action potential causes terminal buttons to release

neurotransmitters into the synaptic cleft

Question 6

chemical message released

Answer 6

Depending on the facilitating or inhibitory nature of the
neurotransmitter released, the voltage of the cell membrane
receiving the message becomes depolarised or
hyperpolarised, and the process repeats