11F L002 The Nervous System

What is the main function of nerves in the body?

• To carry signals in the form of electrical impulses

• To produce hormones

• To store nutrients

• To transport oxygen in the bloodstream

What is the function of a relay neurone in the central nervous system?

• It detects a stimulus

• It sends impulses to effectors

• It transmits impulses between sensory and motor neurones

• It produces hormones

What is the correct order of events in a reflex action, starting from the stimulus?

• Stimulus → Effector → Sensory Neurone → Response → Motor Neurone → CNS

• Stimulus → Receptor → Sensory Neurone → CNS (Relay Neurone) → Motor Neurone → Effector → Response

• Stimulus → Motor Neurone → Receptor → CNS → Sensory Neurone → Effector → Response

• Stimulus → Response → Effector → Motor Neurone → CNS → Sensory Neurone → Receptor

What is the function of the spinal cord in a reflex arc?

• It processes the impulse and sends it to the relay neurone

• It generates the initial impulse

• It contracts the muscle

• It detects the stimulus

Why is the direction of impulse important in a reflex arc?

• It ensures the response is quick and automatic

• It allows the brain to consciously control the response

• It slows down the reaction time

• It prevents the impulse from reaching the muscle

What type of neurone passes the impulse to a relay neurone in the spinal cord?

• Motor neurone

• Sensory neurone

• Effector neurone

• Impulse neurone

What carries out the action that is needed in a reflex arc?

• Stimulus

• Effector

• Relay neurone

• Sensory neurone

Which type of neurone carries the electrical impulse from the receptor cell?

• sensory neurone

• relay neurone

• motor neurone

• effector neurone

What is the function of the effector in the nervous system response?

• To carry out the action that is needed

• To detect the stimulus

• To send the impulse to the spinal cord

• To generate an electrical impulse

Arrange the following steps in the correct order for a nervous system response: relay neurone, effector, sensory neurone, receptor cell.

• receptor cell → sensory neurone → relay neurone → effector

• effector → relay neurone → sensory neurone → receptor cell

• sensory neurone → receptor cell → relay neurone → effector

• relay neurone → effector → receptor cell → sensory neurone