2.2 - Reflex actions Flashcards
1
Q
What are the main steps involved in reflex actions?
A
- A receptor detects the stimulus
- A sensory neuron transmits the impulse to the CNS
- A relay neuron passes the impulse on
- A motor neuron is stimulated
- The impulse passes to an effector
- Action is taken (the response)
2
Q
What are reflex actions also known as?
A
Reflexes
3
Q
What is a reflex arc?
A
The sequence from receptor to effector
4
Q
What is a synapse?
A
The junction between two neurons
5
Q
How does the electrical impulse move across a synapse?
A
Chemicals diffuse across the gap and transmit the impulse
6
Q
What does a relay neurone do?
A
It links the sensory and motor neurons across the CNS
