Topic 19: Nervous System - Neuron Junctions (synapses)

Question 1

Name the three types of neuron junctions

Answer 1

1. neuronal junction
2. Neuromuscular junction
3. Neuroglandular junction

Question 2

What are neuronal junctions? (2)

Answer 2

• neuron to neuron
• can be chemical (use neurotransmitters) or electrical (ions)

Question 3

What are neuromuscular junctions?

Answer 3

• motor neuron to skeletal muscle (anything muscle)

Question 4

What are neuroglandular junctions?

Answer 4

• motor neuron to gland

Question 5

What are the most common synapses?

Answer 5

• chemical neuronal synapses

Question 6

What are the 4 structures of a chemical neuronal synapse?

Answer 6

1. presynaptic neuron
2. Axon terminal
3. Synaptic cleft
4. Postsynaptic neuron

Question 7

What is the presynaptic neuron?

Answer 7

• neuron bringing impulses

Question 8

What is the axon terminal? (2)

Answer 8

• with synaptic end bulbs
• inside the end bulb (presynaptic membrane) are synaptic vesicles with neurotransmitter

Question 9

What is the synaptic cleft?

Answer 9

• space between neurons

Question 10

What does the postsynaptic neuron do?

Answer 10

• receives the impulse

Question 11

What structure does the postsynaptic neuron contain? What is it?

Answer 11

• postsynaptic membrane
• cell membrane of dendrites of cell body with receptor sites for neurotransmitter