6.1: The central nervous system (CNS)

Question 1

Jeremy is digging in the garden. He feels the spade hit a rock and stops digging immediately.
Explain how sensory, relay and motor neurons would function in this situation (6 marks)

Answer 1

Sensory neurons send information from the senses to the brain

Question 2

Jeremy is digging in the garden. He feels the spade hit a rock and stops digging immediately.
Explain how sensory, relay and motor neurons would function in this situation (6 marks).
Sensory neurons send information from the senses to the brain.

Answer 2

Here, receptors in Jeremy’s hand would sense the jolt of the spade hitting the rock and send that information via the peripheral nervous system to the CNS

Question 3

Jeremy is digging in the garden. He feels the spade hit a rock and stops digging immediately.
Explain how sensory, relay and motor neurons would function in this situation (6 marks).
Sensory neurons send information from the senses to the brain.
Here, receptors in Jeremy’s hand would sense the jolt of the spade hitting the rock and send that information via the peripheral nervous system to the CNS.

Answer 3

Relay neurons connect with other neurons, mostly found in the CNS

Question 4

Jeremy is digging in the garden. He feels the spade hit a rock and stops digging immediately.
Explain how sensory, relay and motor neurons would function in this situation (6 marks).
Sensory neurons send information from the senses to the brain.
Here, receptors in Jeremy’s hand would sense the jolt of the spade hitting the rock and send that information via the peripheral nervous system to the CNS.

Relay neurons connect with other neurons, mostly found in the CNS.

Answer 4

Here, the brain would decide how to response to it, therefore acting between the sensory and motor neurones

Question 5

Jeremy is digging in the garden. He feels the spade hit a rock and stops digging immediately.
Explain how sensory, relay and motor neurons would function in this situation (6 marks).
Sensory neurons send information from the senses to the brain.
Here, receptors in Jeremy’s hand would sense the jolt of the spade hitting the rock and send that information via the peripheral nervous system to the CNS.

Relay neurons connect with other neurons, mostly found in the CNS.
Here, the brain would decide how to response to it, therefore acting between the sensory and motor neurones.

Answer 5

Motor neurons send messages via their long axons from the brain to the effectors, like muscles

Question 6

Jeremy is digging in the garden. He feels the spade hit a rock and stops digging immediately.
Explain how sensory, relay and motor neurons would function in this situation (6 marks).
Sensory neurons send information from the senses to the brain.
Here, receptors in Jeremy’s hand would sense the jolt of the spade hitting the rock and send that information via the peripheral nervous system to the CNS.

Relay neurons connect with other neurons, mostly found in the CNS.
Here, the brain would decide how to response to it, therefore acting between the sensory and motor neurones.

Motor neurons send messages via their long axons from the brain to the effectors, like muscles.

Answer 6

Here, the message from the brain instructs Jeremy’s arm muscles to stop working and stop the digging action