1.3Membrane Potential

Question 1

Dendrite

Answer 1

Fine processes derived from cell body

Question 2

Axon

Answer 2

Used for quick transmission over long distance

Question 3

Synapse

Answer 3

Connection between 2 neurones

Question 4

What causes an uneven distribution of charge across membrane

Answer 4

Different permeability to ions

Question 5

What is the resting membrane potential of neurones

Answer 5

-70mv

Question 6

What happens to the membrane potential when sodium is increased

Answer 6

Depolarisation
Membrane potential becomes less negative

Question 7

What happens to the membrane potential when chloride is increased

Answer 7

Hyperpolarisation
Membrane potential becomes more negative

Question 8

What is an action potential

Answer 8

An electrical spike from the reverse of membrane polarity

Question 9

All or none

Question 10

What do excitatory receptors cause

Answer 10

Depolarisation

Question 11

Example of neurotransmitters

Answer 11

Glutamate
Acetylcholine
GABA
Dopamine

Question 12

What is an Agonist neurotransmitter

Answer 12

Bind to receptor
Same response as original neurotransmitter

Question 13

Antagonist neurotransmitter

Answer 13

Binds to receptor
No response

Question 14

Example of drug affecting membrane potential

Answer 14

Local anaesthetics

Question 15

Example of drug affecting synthesis

Answer 15

L-DOPA for Parkinson disease

Question 16

Example of drug affecting receptors

Answer 16

Antipsychotic drug
Schizophrenia