nervous system Flashcards

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1
Q

what is an effector

A

a muscle/gland (MAKE SURE TO NAME IT IN QN)

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2
Q

Central nervous system consists of?

A

brain, spinal cord

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3
Q

peripheral nervous system consists of?

A

Cranial nerves
Spinal nerves
Sense organs

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4
Q

function of nervous system

A
  1. control voluntary actions
  2. control involuntary actions
  3. allows for coordination of body parts quickly
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5
Q

pathway of nerve impulses

A

stimulus -> recpetor/sensory nuerone -> CNS -> synpase -> relay neruone -> synpase -> motor neurone -> effector

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6
Q

sensory neurone

A

trnasmits nerve impulses from sense organs/receptors to CNS

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7
Q

relay neurone

A

transmits nerve impulses from sensory neurone to the motor neurone

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8
Q

motor neurone

A

transmits nerve impulses from CNS to effectors

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9
Q

direction nerve impulses travel in the neurones?

A

Dendrites -> dendrons -> cell body -> axon

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10
Q

what is a synapse

A

Junction between two neurones/between a neurone and an effector

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11
Q

rooting reflex

A

Pressure exerted onto baby face stimulates the skin receptors
Nerve impulses are generated
Nerve impulses are transmitted along sensory neurone to brain
In brain, nerve impulses are transmitted first across a synapse to relay neurone and across anther synapse to the motor neurone
Motor neurone trnamsits nerve impulses from brain to neck muscle
The neck muscles contract and baby turns his face towards the touch

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12
Q

sensation pathway

A

Receptor in skin -> sensory neurone -> relay neurone in spinal cord -> forebrain

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13
Q

voluntary action

A

Forebrain -> relay neurone in spinal cord -> motor neurone -> effector

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14
Q

Voluntar actions vs Involuntary action

A

Voluntar actions vs Involuntary action

Controlled by will, Not controlled by will

Receptor is unnecessary as nerve impulses can be initiated in brain, Receptor is necessary to generate nerve impulses

Nerve impulses initiated by brain, Nerve impulses not initiated by brain

May or may not involve sensory neurone, Always involve the sensory neurone

Not the same response to the same stimulus, Always the same response to the same stimulus

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