Bioligy

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Receptors
Receptors are groups of specialised cells that can detect changes in the environment called stimuli. Receptors are often located in the sense organs, such as the ear, eye and skin. Each organ has receptors sensitive to particular kinds of stimulus. T
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Cells
Most animal cells have a nucleus, cytoplasm and cell membrane. The human central nervous system (CNS) consists of the brain and spinal cord.
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Neurones
Neurones are nerve cells that carry information as tiny electrical signals. There are three different types of neurones, each with a slightly different function: sensory, relay and motor.
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Synapses
Where two neurones meet there is a tiny gap called a synapse. Signals cross this gap using chemicals. One neurone releases the chemical into the gap. The chemical diffuses across the gap and makes the next neurone transmit an electrical signal.
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reflex action
stimulus → receptor → sensory neurone → relay neurone → motor neurone → effector
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Other cards in this set

Card 2

Front

Most animal cells have a nucleus, cytoplasm and cell membrane. The human central nervous system (CNS) consists of the brain and spinal cord.

Back

Cells

Card 3

Front

Neurones are nerve cells that carry information as tiny electrical signals. There are three different types of neurones, each with a slightly different function: sensory, relay and motor.

Back

Preview of the back of card 3

Card 4

Front

Where two neurones meet there is a tiny gap called a synapse. Signals cross this gap using chemicals. One neurone releases the chemical into the gap. The chemical diffuses across the gap and makes the next neurone transmit an electrical signal.

Back

Preview of the back of card 4

Card 5

Front

stimulus → receptor → sensory neurone → relay neurone → motor neurone → effector

Back

Preview of the back of card 5

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