Neuroscience Quiz

The swollen end of a presynaptic neurone is called the __________.

• synaptic cleft

• presynaptic knob

• axon terminal

• dendritic spine

• synaptic vesicle

The gap between the presynaptic and postsynaptic neurone is called the __________.

• synaptic cleft

• synaptic vesicle

• axon hillock

• dendrite

The neurotransmitter at cholinergic synapses is __________.

• dopamine

• serotonin

• acetylcholine (ACh)

• norepinephrine

The influx of __________ ions triggers the fusion of synaptic vesicles with the presynaptic membrane.

• sodium (Na+)

• potassium (K+)

• calcium (Ca2+)

• chloride (Cl-)

Sodium ions enter the postsynaptic neurone through __________ ion channels, causing __________.

• sodium, depolarisation

• calcium, repolarisation

• magnesium, hyperpolarisation

• potassium, hyperpolarisation

• chloride, depolarisation

At inhibitory synapses, neurotransmitters may cause the opening of __________ channels, leading to __________ of the postsynaptic membrane.

• sodium, depolarisation

• potassium, repolarisation

• chloride, hyperpolarisation

• calcium, depolarisation

The enzyme __________ breaks down ACh in the synaptic cleft.

• amylase

• protease

• acetylcholinesterase

• lipase

__________ summation occurs when multiple presynaptic neurones release neurotransmitter at the same time.

• Temporal

• Spatial

• Sequential

• Linear

What triggers the release of neurotransmitter from the presynaptic neurone?

• Sodium ion influx

• Calcium ion influx

• Potassium ion efflux

• ATP hydrolysis

The enzyme that breaks down acetylcholine in the synaptic cleft is:

• Amylase

• Protease

• Acetylcholinesterase

• Lipase