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Nervous System and Reflex Actions Flashcards | StudBud

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Nervous System and Reflex Actions

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KS3/GCSE #biology #Nervoussystem basics and outline of #reflexaction pathway and #synapses

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Questions 8

Answers

1
Electrical impulses reach the central nervous system. Which of these organs make up the CNS?
Brain and heart
Spinal cord
Brain and Spinal cord
Eyes, nose, tongue and skin.
2
The addition of which neurone tells us that this diagram shows us a reflex action?
Neurone Z
Neurone Y
Neurone X
3
A receptor is...
...a change in the environment.
...a special type of cell that detects a stimulus.
...made up of lots of cells.
...causes a response to a stimulus.
4
A synapse is...
...where the neurone meets the effector.
...a gap between two neurones.
...a chemical messenger.
...where the receptor meets the neurone.
5
The skin is known as a sense organ. Which of these stimuli does it NOT respond to?
Odour
Pressure
Temperature
Pain
6
What neurone carries the electrical impulse from the receptor to the CNS?
Receptor neurone
Motor neurone
Sensory neurone
Relay neurone
7
How do impulse 'jump' between neurones?
Electrical signal moves along tiny fibres across the synapse
Chemicals cause the synapse to close, joining both neurones
Electrical signal is attracted to the other neurone
Chemicals are released and diffuse across the synapse
8
Which of the following is an effector organ?
Eye
Gland
Muscle
Brain