Nervous system and reflex arc Flashcards
1
Q
What is the role of a receptor?
A
To detect a stimulus.
2
Q
What is the role of a sensory neurone?
A
Electrical impulses from a receptor to a CNS.
3
Q
What is the role of a motor neurone?
A
To transfer a signal from the CNS to the effector.
4
Q
What is the role of a relay neurone?
A
To transfer a signal from a sensory neurone to a motor neurone.
5
Q
What is a reflex?
A
An automatic response to a stimulus.
6
Q
Pathway of reflex arc
A
Stimulus
Receptor
Sensory neurone
Relay neurone
Motor neurone
Effector
Response
7
Q
Two main types of effectors
A
Muscles & Glands
Muscles Contract.
Glands release hormones.
8
Q
Why are reflexes important?
A
To protect us from harm
9
Q
Why are reflexes important?
A
To protect us from harm
