Synapses

Question 1

What is the presynaptic neuron?

Answer 1

neuron along which the impulse has arrived

Question 2

What is the synaptic cleft?

Answer 2

The gap which separates the axon of one neuron from the dendrite of the next neuron

Question 3

What is the postsynaptic neuron?

Answer 3

it is the neuron that receives the neurotransmitter

Question 4

What are synaptic vesicles?

Answer 4

vesicles containing neurotransmitters. the vesicles fuse with the presynaptic membrane and release their contents into the synaptic cleft

Question 5

Example of excitatory neurotransmitters?

Answer 5

Acetylcholine

Question 6

Example of an Inhibitory neurotransmitters?

Answer 6

GABA

Question 7

What are the qualities of a motor neuron?

Answer 7

A large cell body at one end that lies within the spinal cord or brain

A nucleus that is always in its cell body

Many highly-branched dendrites extending from the cell body, providing a large surface area for the axon terminals of other neurones

Question 8

What are the qualities of a relay neuron?

Answer 8

Short, but highly branched, axons and dendrites

Question 9

What are the qualities of a sensory neuron?

Answer 9

A cell body that branches off in the middle of the cell

A single long dendron that carries impulses to the cell body and a single long axon that carries impulses away from the cell body