The Nervous System year 9

Which is NOT a function of the nervous system?

• gathering information

• responding to a stimulus

• maintaining homeostasis

• collecting waste

True or false:

A reflex signal must travel to the brain before a response to the stimulus can occur.

• True

• False

What is a reflex?

• an automatic movement in response to a stimulus

• the gap between neurons where chemical reactions occur

• the part of the brain responsible for involuntary movements

• a muscle memory

Physical injuries, like a major car accident, can be very dangerous to nervous system health. How?

• the nerves will communicate slower

• pain receptors activate during physical injuries

• damaged nerves cannot send or receive signals

• the driver will be very upset about their destroyed car

A spider feels a fly land on its web. This is an example of:

• gathering information

• responding to a stimulus

• maintaining homeostasis

• collecting waste

After seeing a moth, a frog uses its tongue to catch it. This is an example of:

• gathering information

• responding to a stimulus

• maintaining homeostasis

• collecting waste

What is the basic functional unit of the nervous system?

• Axon

• Neuron

• Dendrite

• Synapse

Answer explanation

The basic functional unit of the nervous system is the neuron. It is responsible for transmitting electrical signals and information throughout the body.

What is the main function of the spinal cord?

• To control voluntary movements

• To process thoughts and learning

• To transmit information between the brain and the rest of the body

• To regulate breathing and heart rate

Which part of the neuron receives signals from other neurons?

• Axon

• Cell body

• Dendrites

• Myelin sheath

Answer explanation

Dendrites receive signals from other neurons. They are the part of the neuron that receives information and transmits it to the cell body.

What is the function of the axon in a neuron?

• To transmit signals between neurons

• To protect the neuron from damage

• To speed up the transmission of signals along the axon

• To process sensory information