neurons

Question 1

What is a dendrite

Answer 1

Long fibers where the neuron recieves the nerve impulse from other neurons

Question 2

what is a soma

Answer 2

The body of the nerve cell. Most neuronal proteins are generated here

Question 3

What is a axon

Answer 3

The long fiberous cable that sends impulses away from the cell towards another nerve cell

Question 4

What is the node of ranvier

Answer 4

Parts of the Axon that arent covered by myelin , action potential can occur here

Question 5

Axon terminal

Answer 5

The end of a synaptic knob

Question 6

What is a Schwann cell

Answer 6

Serves as the muelinatin gcell for PNS. Support cells for peripheral neurons

Question 7

What is a myelin sheath

Answer 7

• Protein wrapped around the Axon
• Acts as an insulator to prevent the signal from leaving the Axon
• Increases speed of conduction

Question 8

What a synapse

Answer 8

The space between 2 neurons and is where neurotransmitters chemically pass one impulse to the next cell

Question 9

What are they main types of Neurotransmitters

Answer 9

• dopamine
• acetylcholine
• epinephrine
• Serotonin

Question 10

How does a nerve impuse travel from on cell to the next

Answer 10

1. 1st neuron fires & sends a signal down the Axon to the axon terminal
2. Once at the terminal The action potential causes the** Synaptic vessels** (vessels containing neurotransmitter) to bind with the pre-synaptic membrane
3. one binded they release the neurotransmitter into the Synaptic cleft
4. The neurotransmitter diffuses across the synapse and binds with its respecitve receptors on the dendrites
5. if the impulse is excitatory the binding will trigger then next impulse and that action potential will travel down that nerve cell