Flashcards in The Nervous System Deck (30)
Your nervous system allows you to r________ to your surroundings
What is a stimulus?
A change in your surroundings
List examples of stimuli
Changes in position
What detects stimuli?
Where are receptors located in the human body?
What is meant by the central nervous system?
Neurones (nerve cells)
How is information sent around the body?
The gap between 2 nerve cells is called a
How are messages passed between neurones
By a chemical (neurotransmitter)
Why do we have reflex actions?
To protect us
Describe a reflex action
Explain the stages involved in a reflex action when being stung by a bee.
Receptor (in skin)
Sensory Neurone (carries electrical impulse)
Relay Neurone (carries electrical impulse)
Motor Neurone (carries electrical impulse)
Effector (muscle in arm)
Response (muscle contracts moving arm)
Where in the body are light receptors found?
Where in the body are balance receptors found?
Where in the body are sound receptors found?
Which two types of receptor do the ears contain?
Which type of receptors does the tongue contain?
Which type of receptors does the nose contain?
Which type of receptors are found in the skin?
A stimulus is detected by a
A receptor passes an electrical impulse to a
A sensory neurone passes an electrical impulse to a
A relay neurone passes an electrical impulse to a
A motor neurone passes an electrical impulse to an
An effector can be either a _____ or a _____
Muscles and glands are both
What is the response of a muscle?
What is the response of a gland?
It releases a hormone
Explain what happens during a conscious action e.g. seeing a cat in the road and stepping on car brakes.
Stimulus - light reflecting off cat.
Receptors - in eyes detect light from cat.
Sensory neurone - carries electrical impulse to...
Central nervous system which carries an impulse to...
Motor neurone - carries impulse to...
Effector (muscle in foot)
Response - step on car brakes.