Unit 1-2.2- Reflex actions

Question 1

What are the main steps in a reflex action?

Answer 1

A receptor that detects a 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.

Question 2

What is the junction between two neurons called?

Answer 2

Synapse.

Question 3

What transmits the impulse across the gap?

Answer 3

Chemicals.

Question 4

What is the sequence from receptor to effector called?

Answer 4

A reflex arc.