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
1 of 17
A cell adapted to detect changes in the environment.
Receptor
2 of 17
The change in the organism.
Response
3 of 17
An organ that responds to stimulation by a nerve impulse resulting in a change or response.
Effector
4 of 17
The central nervous system e.g. brain or spinal chord.
Coordinator
5 of 17
The movement away from or towards a stimulus.
Taxis
6 of 17
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
13 of 17
Involuntary response to a stimulus
Reflex
14 of 17
The nerve pathway in the body taken by an action potential that leads to rapid, involuntary response to a stimulus
Reflex Arc
15 of 17
Stimulates effectors and so speeds up any activity.
Sympathetic Nervous System
16 of 17
Inhibits effectors and so slows down any activity
Parasympathetic Nervous System
17 of 17

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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