Neuron Structure Flashcards Preview

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Flashcards in Neuron Structure Deck (12)
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1
Q

What is a Neuron?

A

A cell that specialises in receiving, transmitting and processing information.

2
Q

Synapse

A

Are tiny gaps between the axon terminal and the dendrites
Provides connection between neurons
Neurotransmitters cross between this gap
Known as SYNAPTIC GAP

3
Q

Cell Body (Soma)

A

Contains the nucleus that controls the maintenance and function of the cell (includes DNA).

4
Q

Dendrites

A
Fine branches that protrude from the cell body.
Receives information (chemical signals - neurotransmitters) from other neurons and sends it to the cell body as electrical signals.
5
Q

Axon

A

Specialised for the purpose of transferring information over distance in the NS

6
Q

Myelin Sheath

A

Protects the axon and assists with speedy transmission of electrical impulses.

7
Q

Axon Terminals

A

Similar to dendrites

Takes AWAY the message from the cell body, converting it into neurotransmitters which as passed onto the next neuron.

8
Q

Nodes of Ranvier

A

Are the gaps in the myelin sheath, they help speed up the transmission of the electrical signal/nerve impulses.

9
Q

Neurotransmitters

A

After an electrical impulse travels down a neuron, it is then converted into specific chemical neurotransmitters that travel between neurons carrying a specific message.
They are produced by glands
Certain neurotransmitters will only attach to certain receptors to send the correct message.

10
Q

Motor Neurons

A

Send signals from the CNS (Central Nervous System) to the organs, glands and muscles. They create action within these structures

11
Q

Sensory Neurons

A

Sends information to the Central Nervous System based on external (e.g. temperature) or internal (e.g. hunger) stimuli

12
Q

Interneurons

A

Transmit information between both types of neurons. Can act as an intermediary in reflex actions, rather than the signals going to the CNS