B5a- homeostasis and response side one Flashcards

1
Q

What is homeostasis?

A

the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function.

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2
Q

What do receptor cells do?

A

detect stimuli (changes in the environment)

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3
Q

What are co-ordination centres?

A

receive information from receptors

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4
Q

What are effectors?

A

Muscles or glands which bring about a response to restore optimum levels

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5
Q

What are reflex actions?

A

Automatic and rapid
do not involve the conscious part of the brain and can protect humans from harm

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6
Q

name the four sense organs

A

ears
eyes
skin
nose and tongue

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7
Q

what are the ear receptors sensitive to?

A

sound and changes in position for balance

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8
Q

what are the eye receptors sensitive to?

A

light

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9
Q

what are the skin receptors sensitive to?

A

touch,pressure,pain and temperature

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10
Q

what are the nose and tongue receptors sensitive to?

A

chemicals for smell and taste

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11
Q

what is a synapse?

A

gap where neurons meet

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12
Q

Reflex arc pathway order (7)

A

stimulus
receptor
sensory neurone
relay neurone
motor neurone
effector
response

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13
Q

the nervous system voluntary response pathway (7)

A

stimulus
receptor
sensory neurone
coordinator
motor neurone
effector
response

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