Motor nueron/ action potential

Question 1

What is action potential

Answer 1

When a dendrite on a motor neuron receives a signal.

Question 2

What is it called when there is no signal on a motor neuron

Answer 2

resting potential

Question 3

Resting potential

Answer 3

This means the neuron is more NEGATIVE than its surroundings.

Question 4

At resting potential what minerals are higher in and out of the cell

Answer 4

Sodium (Na+) is higher outside the cell.
Potassium (K+) is higher inside the cell.

Question 5

What happens during action potential?

Answer 5

1- Dendrite receives a signal which generates action potential along the axon
2- The action potential will change the charge of a neuron.
3- The ion channels open allowing Na+ too flood in first region of axon.
4-Na+ is a positive ion so it’s called depolarisation.
5- As the electrical charge is becoming more positive in the axon as Na+ floods in & most k+ channels at that moment stay closed

Question 6

Motor neuron organelles

Answer 6

Dendrite
Nucleus
Node of ranvier
myelin sheeth
Nerve ending
Axon

Question 7

How are Neurotransmitters released?

Answer 7

Action potential will signal sypnatic vessels in that neuron to release neurotransmitters.

Question 8

neurotransmitters how they travel

Answer 8

goes along axon terminal and neurotransmitters get released from the synaptic vessel across the synaptic cleft. The neurotransmitters then bind to specific dendrite and the dendrite receives this signal and starts an action potential.