88. interneuronal synapses

Question 1

the structure of a synapse ensures the direction of transmission is what

Answer 1

unidirectional

( as only post synaptic neuron has receptors for Na+)

Question 2

What are the components of the synapse

Answer 2

presynaptic axon terminal- neurotransmitter released by exocytosis from synaptic vesicles

postsynaptic cell membrane- receptors for neurotransmitters and ion channels

Question 3

what separates the presynaptic and postsynaptic membranes

Answer 3

synaptic cleft

Question 4

what are the 2 types of synapses

Answer 4

electrical and chemical synapse

Question 5

What is a chemical synapse

example

Answer 5

electrical activity in presynaptic neuron causes release of neurotransmitter which binds to receptors on postsynaptic membrane- causes electrical impulse

cholinergic synapse with acetylcholine

Question 6

What is an electrical synapse

Answer 6

pre and postsynaptic neuron close together.
connected by channel proteins forming gap junctions which allow electrical current to pass

Question 7

what are the subclassifications of synapses

Answer 7

axosomatic- axon terminal ends on a body

axoaxonic- axon terminal secretes into another axon

axodendritic- axon terminal ends on dendritic spine