Sense organs detext stimuli. A stimulus is a change in the environment A stimulus can be light, sound, pain, pressure ect. Receptors change stimulus energy into electrical impulses
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Nerves
Neurones bundle together to form nerves. Nerves transmit information as electrical impulses to and from the CNS.
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Effectors
Effectors are muscles and glands. Instructions from the CNS are sent to the effectors. Glands secrete hormones in a response to a nervous impulse. Muscles contract in a response to a nervous impulse.
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Sense Organs
There are 5 sense organs. Eyes, Ears, Nose, Tongue and Skin. Information from the sense organs is sent to the CNS. Sense organs contain receptors.
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Specialised Neurones
Sensory neurones carry signals as electrical impulses from the receptors in the sense organs to the CNS. Relay neurones carry signals from the sensory neurones to motor neurones/ Motor Neurones carry signals from the CNS to the effectors.
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The Central Nervous System (CNS)
The CNS is where reflexes and actions are coordinated. The CNS consists of the brain and spinal cord.
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Other cards in this set
Card 2
Front
Neurones bundle together to form nerves. Nerves transmit information as electrical impulses to and from the CNS.
Back
Nerves
Card 3
Front
Effectors are muscles and glands. Instructions from the CNS are sent to the effectors. Glands secrete hormones in a response to a nervous impulse. Muscles contract in a response to a nervous impulse.
Back
Card 4
Front
There are 5 sense organs. Eyes, Ears, Nose, Tongue and Skin. Information from the sense organs is sent to the CNS. Sense organs contain receptors.
Back
Card 5
Front
Sensory neurones carry signals as electrical impulses from the receptors in the sense organs to the CNS. Relay neurones carry signals from the sensory neurones to motor neurones/ Motor Neurones carry signals from the CNS to the effectors.
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