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psychology year 1 > Nervous system > Flashcards

Nervous system Flashcards

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1
Q

What is the main function of the nervous system

A

collect, process and respond to info from environment

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2
Q

What is our nervous system

A

primary communications system which communicates with fast moving electrical signals.

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3
Q

What are the effects of these electrical systems

A

Fast acting, short acting

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3
Q

What does our central nervous system do

A

Complex decisions

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4
Q

What does our nervous system split into

A

-Central nervous system
-Peripheral nervous system

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5
Q

What does our peripheral nervous system do

A

send info from outside world to CNS and body

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6
Q

What does our central nervous system split into

A

-Brain
-Spinal cord

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7
Q

What does our peripheral nervous system split into

A

-Somatic nervous system
-Autonomic nervous system

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8
Q

What does our somatic nervous system do

A

voluntary muscle movement

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8
Q

What does our autonomic nervous system do

A

Involuntary muscle movement

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9
Q

What does our autonomic nervous split into

A

-Sympathetic nervous system
-Parasympathetic nervous system

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10
Q

What does our sympathetic nervous system do

A

Fight/Flight reaction

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11
Q

What does our parasympathetic nervous system do

A

Rest/digest after fight/flight

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12
Q

What is a neuron

A

A Nerve cell

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13
Q

What are the 3 main types of neurons

A

-Sensory
-Relay
-Motor

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14
Q

What are the components of a sensory neuron

A

-Cell body
-Connects to receptor cell
-Axon
-Mylein sheath
-Neurofibril node

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15
Q

What are the components of a relay neuron

A

-Cell body
-Dendrites
-Axon
-Pre synaptic terminal
-NO Mylein sheath

16
Q

What are the components of a motor neuron

A

-Cell body
-Mylein sheath
-Axon
-Neurofibril node

17
Q
A
17
Q

What is the neurofibril node

A

gaps between mylein sheath

18
Q

What is function of a sensory neuron

A

-Carry signals from receptors to spinal cord/brain
-Allows reflexes/sensations

19
Q

What is the function of a relay neuron

A

-Communication between sensory and motor neurons

20
Q

What is the function of a motor neuron

A

signals from central nervous system to effector organs (muscles)

21
Q

What is the location of the sensory neuron

A

located in PSN

22
Q

What is the location of the relay neuron

A

found in brain/visual system mostly

23
Q

Where is the location of the motor neuron

A

cell bodies in the CNS
axons long so form part of the PSN

24
Q

What does the cell body do

A

contains nucleus which has genetic info

25
Q

What do the dendrites do

A

receive signal from previous neuron

26
Q

what does the axon do

A

length of neuron signal travels down

27
Q

what does the axon terminal do

A

end of axon where synaptic transmission takes place

28
Q

what does the mylein sheath do

A

insulates axon

29
Q

What do the nodes of ranvier do

A

gaps between mylein sheath which speed up signals

30
Q

What is the first step of synaptic transmission

A

info passes down axon as electrical impulse

30
Q

What can electrical impulse also be called

A

Action potential

31
Q

What is the second step of synaptic transmission

A

electrical impulse excites the vesicles and they release neurotransmitters

32
Q

What is a neurotransmitter

A
33
Q

What is the third step of synaptic transmission

A

the neurotransmitters release into the synapse

34
Q

What is the fourth step of synaptic transmission

A

Neurotransmitters travel across synapse and bind to receptor sites on post synaptic neuron

35
Q

What is the fifth step of synaptic transmission

A

electrical impulse travels down dendrite of next neuron

36
Q

What is the sixth step of synaptic transmission

A

Receptor sites once activated either produce excitatory or inhibitory effects on post synaptic cell

37
Q

What do inhibitory neurotransmitters do

A

calm brain/nervous system.
make post synaptic neuron less likely to fire

38
Q

What do excitatory neurotransmitters do

A

stimulate brain/nervous system.
makes post synaptic neuron more likely to fire

psychology year 1 (11 decks)

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