Synapse And Regeneration

Question 1

T/F

The neuromuscular synapse with a gland cell.

Answer 1

False. It synapse with a skeletal muscle.

Question 2

Name the 3 types of chemical synapses.

Answer 2

1. Synapses with another neuron
2. neuromuscular synapses
3. Neuroglandular synapses

Question 3

Direction of synapse

Answer 3

Action potential
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Axon
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Terminal bouton
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Calcium enters terminal bouton
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Synaptic vesicles (containing neurotransmitters)
Migrate to end, membrane to membrane fusing
Terminal bouton
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Bind to receptors on post synaptic membrane
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Causing sodium channels to open to allow sodium to enter

Question 4

Neuron organization and processing

Answer 4

1) divergence- information from 1 neuron > 2 neurons > 3 neurons
2) convergence- 4 neurons > 1 neuron
3) serial processing- all lined up
4) parallel processing- 1 neuron > 3 neurons then serial processing
5) reverberation- 1 neuron > 2 neuron > 3 neuron > back to 1st neuron

Question 5

Nerve regeneration after injury

Answer 5

Schwann cells in PNS to regenerate

Question 6

Steps to nerve regeneration

Answer 6

1) fragmentation of axon and myelin occurs in distal stump
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2) Schwann cells form cord, grow into cut, and unite stumps. Macrophages
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3) axon sends buds into network of Schwann cells and then start growing along cord of Schwann cells
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4) axon continues to grow into distal stump and is enfolded by Schwann cells