5.2 Nervous System Review

A signal that causes an animal to react.

• A response

• A stimulus

• A trigger

• A neuron

An animals reaction to a stimulus.

• A trigger

• A neuron

• A response

• A stimulus

The nervous system allows animals to ....

• detect signals in their environment, process the signal, and react to them.

• detect responses in their environment and process them.

• detect other animals, reproduce, and fight bacterial infections.

A ____________ is a nerve cell with a unique structure for receiving and passing on information.

• A neuron

• An impulse

• A sensory neuron

• A interneuron

• A motor neuron

A ______________ is information that travels as an electrical message in a nerve cell.

• A neuron

• An impulse

• A sensory neuron

• A interneuron

• A motor neuron

____________ are nerve cells that detect stimuli.

• An impulse

• A sensory neuron

• A interneuron

• A motor neuron

___________ are nerve cells that pass information between neurons.

• A neuron

• A sensory neuron

• A interneuron

• A motor neuron

A _____________ are nerve cells that carry response information to muscles and other organs.

• A neuron

• A sensory neuron

• A interneuron

• A motor neuron

Describe the simplest nervous systems

• Netlike arrangement of neurons throughout the body.

• Contain a nerve cord and a brain.

• Have sense organs that communicate with the brain through neurons and a nerve cord.

Describe the most complex nervous systems

• Netlike arrangement of neurons throughout the body.

• Neurons that send an impulse through the entire animal making all parts of the animal respond instantly. No brain.

• Have a nerve cord and a brain.