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year 9 Science > Nerve System > Flashcards

Nerve System Flashcards

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Biology 101 flashcards
1
Q

What are the three main parts of a neuron?

A

Dendrites, cell body, axon

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2
Q

The parts of the CNS (central nervous system are)

A

Your brain and spinal chord

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3
Q

What is the layer of insulation called that surroundeds a nerve

A

Myelin sheath

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4
Q

What are the three receptors found in skin?

A

Touch, pain, temperature

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5
Q

What is the function of dendrites?

A

Branch out to other nerves and receive messages

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6
Q

What are neurotransmitters

A

Chemicals that get released into the space between the neuron. (Synapse)

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7
Q

What are sensory neurone

A

They carry messages to sense organs. Such as ears, eyes ect

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8
Q

What Is the function of a motor neurone?

A

Carry messages from the cns to effectors

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9
Q

What is a stimulus

A

A trigger. Like heat

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10
Q

What is a response

A

It’s the action you physically make after the stimuli

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11
Q

What are receptors

A

They are special cells that detect stimuli

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12
Q

What are effectors

A

They are muscles or glands that put the messages into effect

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13
Q

What are the three steps to the reflect arc?

A 
1- arrival of stimulus and activation of receptor 
2- activation of sensory neuron
3- info processing in the CNS
4- info sent to motor neurone 
5- than to effector
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14
Q

Relay neurone is aka

A

Inter-neuron

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15
Q

What are the three neurone?

A

Motor
Sensory
Connecting

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16
Q

From the enterence of a cell to the exit name the parts

A

Dendrites, nucleus,cell body,axon, myelin sheath, axon terminal

17
Q

What is the synapses

A

The connecting point between nerves. When the neurotransmitter is released.

18
Q

Motor neuron in a nutshell

A

Causes movement is muscles

19
Q

Sensory neuron in a nutshell

A

Carry’s sensations to cns

20
Q

Connecting neuron in a nutshell

A

Very small, have lots of dendrites and don’t have mylein

year 9 Science (7 decks)

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