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HASS > Science Revision > Flashcards

Science Revision Flashcards

biology

1
Q

homeostasis

A

a state of balance among all the body systems

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2
Q

how does the body receive information from the outside

A

through the nervous system

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3
Q

receptors

A

a cell or group of cells that receive stimuli

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4
Q

thermoreceptors

A

detect changes in heat (skin, brain)

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5
Q

chemoreceptors

A

detect changes in chemicals (blood, heart, etc)

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6
Q

sound receptors

A

detect vibrations/movement (ear)

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7
Q

light receptors

A

detect changes in light (eyes)

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8
Q

pain receptors

A

pain (skin)

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9
Q

pressure receptors

A

detects changes in pressure (skin)

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10
Q

stimulus

A

a change in the environment detected by receptors

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11
Q

modulator or control centre

A

a control centre processes the message received by the receptor and sends message to the effector

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12
Q

effector

A

a muscle or gland that receives messages from the control centre and carries out a response

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13
Q

response

A

a reaction carried out by the effector

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14
Q

hormone

A

chemicals that coordinate different functions of the body

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15
Q

how do hormones travel throughout the body

A

endocrine glands release hormones into the bloodstream

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16
Q

why are hormones specific

A

they only act on a part of the body if it ‘fits’

17
Q

what is a reflex action

A

an immediate and automatic motor response to a stimulus

18
Q

what is involved in a reflex

A

spinal cord and lower brain

19
Q

what are the 3 main parts of the brain

A

cerebrum, cerebellum and brain stem

20
Q

sensory neurons

A

send impulses from the skin to the spinal cord and brain

21
Q

connector neuron

A

carry nerve impulses to the motor neurons, or the spinal cord and brain

22
Q

motor neurons

A

carry signals from the brain to the nucleus

HASS (7 decks)

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