reflexes

Question 1

What is a reflex?

Answer 1

Rapid, automatic response to a stimulus

Question 2

What is a reflex arc?

Answer 2

Pathway taken by impulses during a reflex action

Question 3

What is the first step to a reflex action?

Answer 3

Receptors detect the stimulus and transmit impulses along the sensory neurone to the brain or the spinal cord (closer one)

Question 4

What is the second step to a reflex action?

Answer 4

Sensory neurone synapse to a relay neurone which passes impulses to motor neurones

Question 5

What is the third step to a reflex action?

Answer 5

Impulses are transmitted along the motor neurone to the effector

Question 6

What are the properties of a reflex action?

Answer 6

Rapid, short lived and localised

Question 7

What are the advantages of reflexes?

Answer 7

Automatic rapid responses preventing tissue damage, increases chance of escaping predators, so homeostasis can be achieved