coordination of response Flashcards

(18 cards)

1
Q

what’re stimuli detected by?

A

receptor cells

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2
Q

where are receptor cells located

A

in sense organs like the nose or eyes
inside the body like in pressure receptors in blood vessels

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3
Q

receptor cells send signals via either the nervous or hormonal system to the bodys COORDINATION centres in the brain or spinal chord

signals are then sent onto parts of the body which respond, whatre these parts of the body called?

A

effectors

can be either muscles or glands!

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4
Q

give an example of the response of effectors

A

muscle: an arm muscle would react to a hot surface by contracting to move the arm away

gland:pancreas responds to high blood glucose by secreting insulin

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5
Q

what does the cns consist of?

A

brain and spinal chord

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6
Q

what does the peripheral nervous system consist of?

A

all the nerves in the body

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7
Q

the nervous system allows detection of stimuli in our surroundings, what does it coordinate after stimuli is detected?

A

allows coordination of the bodys response to the stimuli

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8
Q

how is information from stimuli sent

A

information is sent through the nervous system in the form of electrical impulses that pass along neurones

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9
Q

what is a nerve

A

a bundle of neurones

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10
Q

sensory neurones

A

stimulus-receptor-sensory neurone-cns-motor neurone-effector

transmit nerve impulses from receptors to central nervous system

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11
Q

relay neurones

A

transmit nerve impulses across cns, from sensory neurones to motor neurones

cns is like a central coordinating centre for the impulses that come in from and are sent out to any part of the body

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12
Q

motor neurones

A

impulses from cns to effectors

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13
Q

endocrine system

A

hormones are chemical messengers PRODUCED by endocrine glands and carried by the blood

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14
Q

hormone function

A

transmit information from one organism to another and bring about change by altering the activity of one or more specific target organs

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15
Q

hormones are slower in action than nerve impulses- what kind of functions are they therefore used to control

A

functions that dont need instant responses

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16
Q

what can endocrine glands be stimulated by

A

action of another hormone or by the arrival of a nerve impulse

17
Q

where do endocrine glands secrete hormones?

A

directly into the blood

18
Q

sequence of events

A

stimulus-receptor-hormone-effector