Biology Unit 5 AQA (Unit 9 Response to Stimuli)

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  • Created by: Rebecca
  • Created on: 06-04-13 11:15
A detectable alteration to the internal or external environment of an organism that produces some change in that organism.
Stimulus
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A cell adapted to detect changes in the environment.
Receptor
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The change in the organism.
Response
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An organ that responds to stimulation by a nerve impulse resulting in a change or response.
Effector
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The central nervous system e.g. brain or spinal chord.
Coordinator
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The movement away from or towards a stimulus.
Taxis
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Speed in relation to the stimulus and how often direction changes
Kinesis
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Growth movement of part of a plant in response to a stimulus.
Tropism
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Made up of pairs of nerve that originate from either the brain or the spinal chord
Peripheral Nervous System
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Carry nerve impulses from receptors towards the Central Nervous System (CNS)
Sensory Neurones
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Carry nerve impulses away from the CNS to the effectors.
Motor Neurones
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Carry nerve impulses to the body muscles and is under conscious control.
Voluntary Nervous System
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Carries nerve impulses to the glands, smooth muscle and cardiac muscle and acts subconsciously.
Autonomic Nervous System
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Involuntary response to a stimulus
Reflex
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The nerve pathway in the body taken by an action potential that leads to rapid, involuntary response to a stimulus
Reflex Arc
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Stimulates effectors and so speeds up any activity.
Sympathetic Nervous System
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Inhibits effectors and so slows down any activity
Parasympathetic Nervous System
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Other cards in this set

Card 2

Front

A cell adapted to detect changes in the environment.

Back

Receptor

Card 3

Front

The change in the organism.

Back

Preview of the front of card 3

Card 4

Front

An organ that responds to stimulation by a nerve impulse resulting in a change or response.

Back

Preview of the front of card 4

Card 5

Front

The central nervous system e.g. brain or spinal chord.

Back

Preview of the front of card 5
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