Ch10 The human nervous system Flashcards

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1
Q

Homeostasis

A

Maintaining a stable environment inside the body and cells in response to internal and external conditions

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2
Q

Internal conditions are controlled

A

body temperature
water content
blood glucose concentration

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3
Q

receptors

A

cells that detect changes in internal or external environment(stimuli)

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4
Q

coordination centres(CNS)

A

area that receive and process info from the receptors
send out signals and coordinate response of the body
e.g. brain, spinal cord and pancreas

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5
Q

effectors

A

muscles or glands that produce a response to stimulus that has been received to restore optimum levels

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6
Q

nervous system

A
stimuli
receptor
sensory neurone
CNS
motor neurone
effector
response
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7
Q

reflexes

A

automatic and rapid responses to avoid damage or harm

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8
Q

reflex arc

A
stimulus
receptor 
sensory neurone
relay neurone in spinal cord of unconscious part of the brain
motor neurone
effector
response
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9
Q

synapses

A

physical gaps between neurones that electric impulses can’t leap across

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10
Q

How synapses work

A

electrical impulses reach synapses
chemicals are released from sacs
chemicals(neurotransmitters) diffuse across
chemicals attach to the surface of the next neurone and create a new impulse

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