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biopsych Flashcards

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1
Q

Whats the nervous system

A

*a network of cells in human body
*bodys internal communication system

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2
Q

Whats the function of the nervous system

A

*to collect, process, respond to info from environment
*to control organs and cells in body

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3
Q

What does the nervous system split off to

A

*Central Nervous System
*Peripheral Nervous system

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4
Q

What are the subdivision for the CNS

A

*brain
*spinal cord

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5
Q

What is the role of the brain in the CNS

A

*recieves and processes info from the senses
*centre of conscious awareness
*responsible for higher mental functions
*generates emotions and thought
*initiates respnses
*stores mem

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6
Q

Whats the role of the spinal cord in the CNS

A

*conducts signal TO and FROM the brain
*connects nerves to PNS
*controls reflex actions

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7
Q

What is the role of the PNS

A

*sends msgs TO and FROM CNS via neurons

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8
Q

What are the subdivisions of PNS

A

*autonomic nervous system
*somatic nervous system

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9
Q

Whats the role of the autonomic nervous system

A

*involuntary reponses- breathing, digestion
*controls smooth and cardiac muscles
*controls glands
*control centres are in the brain stem

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10
Q

Whats the role of the somatic nervous system

A

*voluntary movements- walking
*transmits info from the brain to control skeletal muscles
*carries commands from motor cortex
*connects CNS and senses
*integrates brain w outside world

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11
Q

What are the branches of the autonomic nervous system

A

*sympathetic branch
*parasymphatetic

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12
Q

Whats the role of the sympathetic branch

A

*fight and flight response

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13
Q

Whats the role of the parasymphatic branch

A

*conserves and restores energy when relaxed

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14
Q

Name the structures in neurons

A

*dendrites
*cell body
*mylein sheath
*axon
*nodes of ranvier
*terminal button

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15
Q

Whats the function of the cell body

A

*has nucleus that contains genetic material of the cell

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16
Q

Function of the myelin sheath

A

*protect the axon
*helps to sppeed up transmission of the msg

17
Q

Function of the dendrites

A

*where the neurotransmitter receptors are found
*when receptor and neuotrasmitter bind this cause a new electrical impulse

18
Q

Function of the axon

A

*sends action potential thru the neuron to transmit a msg to the nxt neuron

19
Q

Function of the nodes of ranvier

A

*speeds up transmission of impulse
*forces impulse to jump across the gaps along the axon

20
Q

Function of the terminal button

A

*end of the neuron
*send the info thru the next neuron, thru release of neurotrasmitters

21
Q

Whats the location of the sensory neuron

A

*PNS in clusters known as the ganglia

22
Q

Whats the function of the sensory neuron

A

*send info from the senses (PNS) towards the brain
*receptos are found in eyes, ears, tongue, skin

23
Q

Whats the structure of the sensory neuron

A

*long dendrites and short axons

24
Q

Whats the location of the relay neuron

A

*brain, visual system, spinal cord- CNS

25
Q

Whats the function of the relay neuron

A

*carry nerve impulses between neurons allowing sensory and motor neurons to communicate

*involved in analysisng the sensations from these neurons and deciding how to respond

26
Q

Whats the structure of the relay neuron

A

*short dendrites and axons and no mylein sheath

27
Q

Whats the location of the motor neuron

A

*cell bodies are in CNS
*long axons part of PNS

28
Q

Whats the function of the motor neuron

A

*send info via long axons from the CNS thru to effectors- muscles or glands

29
Q

Whats the structure of the motor neuron

A

*short dendrites, long axon

30
Q

Whats the process of synaptic transmission

A

*begins in the pre-synap, action potential are sent down the axon until they reach presynap terminal

*neurotransmitters stored in vesicles in presynap are released into synapse

*neurotransmitters diffuse from high to low concc and bind on the complementary receptors on post synap

*when enough NTs have binded they have 2 possible outcomes: reuptake or excitatory/inhibition

31
Q

What happens if an excitatory NT eg adrelanine binds to the receptor

A

*post synaptic cell becomes positively charged
*makes it more likely that post synap cell will fire so impulse travels down axon.
*increases the brain activity in the CNS

32
Q

What happens if an inhibitory NT like serotonin binds to the receptor

A

*post synap cell becomes negatively charged
*prevents/reduces likelihood that post synap cell will fire
*decreases brain activity in the CNS

33
Q

Whats summation

A

*when excitatory and inhibitory influences are added together
*if overall effect inhibitory reduces likelihood neuron will fire an impluse down postsynap

*if overall is excitatory the neuron will fire an impulse down the post synap.

Psych (27 decks)

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