1The ___central____ nervous system includes the brain and spinal cord.

2The ____peripheral___ nervous system carries messages between the brain and the body.

3The __sensory_____ division of the peripheral nervous system is responsible for receiving inputs like temperature, texture, smell, and taste.

4The _autonomic______ nervous system controls things that you do not often think about, like digestion and breathing.

5The brain sends messages and commands back to the rest of the body through the ___motor____ division of the peripheral nervous system.

6Taste molecules are unique because different molecules trigger _chemoreceptors______ in the nose and mouth.

7Rods and cons__photoreceptors_____ are the major types of cells responsible for receiving light and translating light into nerve signals.

8The optic nerves "cross over" from left to right and form an "X" at the ____optic chiasm___.

9Explain what happens in the nervous system when you touch a hot pan in the kitchen. Your explanation should begin with the perception of temperature, and end with pulling away your hand.

Once one touches the hot pan, the sensory receptors in the skin signal extreme temperature and the sign of tissue harm.

An action potential  is triggered and travels along the sensory fiber from the skin, through the dorsal spinal root to the spinal cord.

The spinal cord activates a motor neuron.

The motor neuron sends a signal to the muscles in one's hand to get the hand away from the hot pan.

The brain gets a signal of pain from the skin's nerves and transmits a message to the muscles in your hand to get away from the hot pan.