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Nervous System and Reflex Actions

8 terms·StudBud Administration·2,439 plays

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

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Questions 8

Answers

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