Quiz on Nerve Synapse

What is the speed of propagation of a nerve impulse in thick myelinated fibers?

• 12 meters/second

• 30 meters/second

• 140 meters/second

• 50 meters/second

According to the all or none law, what happens when a sufficient stimulus is applied?

• No response occurs

• A weak response occurs

• A maximum response occurs

• A partial response occurs

What is the site called where the axon of one neuron meets the dendrites of another neuron?

• Dendritic junction

• Synapse

• Synaptic cleft

• Axon terminal

Which type of synapse occurs between a neuron and a muscle fiber?

• Neuronal synapse

• Neuromuscular synapse

• Neuroglandular synapse

• Interneuronal synapse

What are the swellings at the terminal branches of the axon called?

• Axon terminals

• Dendritic spines

• Synaptic knobs

• Synaptic vesicles

What is the narrow space between the axon terminal and dendrites called?

• Synaptic cleft

• Dendritic gap

• Neuronal gap

• Axonal space

What chemical transmitter is mentioned as being involved in synaptic transmission?

• Serotonin

• Dopamine

• Glutamate

• Acetylcholine

What triggers the release of chemical transmitters from synaptic vesicles?

• Influx of Calcium ions

• Influx of Chloride ions

• Influx of Potassium ions

• Influx of Sodium ions

What happens to the postsynaptic membrane after the action of acetylcholine is terminated?

• It remains active

• It initiates another impulse

• It becomes hyperpolarized

• It returns to resting state

What enzyme is responsible for destroying acetylcholine?

• Cholinesterase

• Neurotransmitterase

• Choline

• Acetylase