Nervous System (mocks)

Question 1

Name the neurones going into the coordination centres

Answer 1

Sensory neurones

Question 2

Name the neurones going out of the coordination centre

Answer 2

Motor neurones

Question 3

Describe how a normal response works

Answer 3

Stimulus -> receptor -> (sensory neurone) -> coordination centre -> (motor neurone) -> effector -> response

Question 4

What is a synapse

Answer 4

The gap between where one neurone ends and another begins

Question 5

Describe the 4 stages of electrical impulses crossing synapses.

Answer 5

1. An impulse arrives at the synapse, vesicles containing neurotransmitters move to the membrane.
2. The vesicles release the neurotransmitters into the gap.
3. The neurotransmitter crosses the synapse and binds to receptors in the end of the next neurone, beginning a new electrical impulse
4. The neurotransmitter is broken down by enzymes in the second neurone

Question 6

Describe the reflex arc

Answer 6

1. Sensory receptors
2. Impulse in sensory neurone travels to grey matter of spinal cord
3. Sensory -> relay neurone
4. Relay -> motor
5. Effector