Term 2 - Topic 5 - The Nervous System

Question 1

Speed for impulses

Answer 1

Speed = distance / time

Question 2

Describe the pathway taken by the nerve impulse in the blink reflex

Answer 2

• bee is the stimulus
• the receptor organ is the eye
• the receptor is the light receptors in the eye
• signal is passed on to the sensory neurone
• relay neurone makes the decision. The impulse is moved to the motor neurone which passes the signal to the effector to produce a response to close the eyes

Question 3

Synapse

Answer 3

Junction between two neurones/ effector cells

Question 5

Neurotransmitters

Answer 5

Travels across the synapse and causes an action potential in the post synaptic neurone