A ------ is an external factor that causes an organism to react.

A ------ is how an organism reacts or responds.

A -------------- pass information about a stimulus from sense organs to other nerve cells.

A -------------- delivers the response to muscles/ glands

The --------- is the “thinking” region of the brain. It is also involved in learning, memory, and conscious thought.

The --------- coordinates movement and controls balance.

The --------- connects vertebrate brains to the rest of the body. it runs through a tube in the vertebral column.

Some cephalopods and arthropods have ---- that detect motion and color and form images.

Spiders can detect vibrations in their web through their ----

Some organisms have --- that can sense sound waves and air motion.