The Nervous System Worksheet

What does CNS and PNS stand for?
Central Nervous System- is the nerve center of the human body, controls all body activities except chemical functions
Peripheral Nervous System- lies outside the brain and spinal cord and serves as a message system between various organs and muscles of the body and the CNS. Connects the CNS with the rest of the body

What are the parts of the CNS?
* Consist of the brain and spinal cord and it controls thinking, memory and behavior.

Describe something that you do on a regular basis that your PNS controls.
* Maintain digestion and controls the urge to urinate.

What are the two divisions of the autonomic nervous system and what does each control?
Sympathetic- controls stress, worry, fear and emergency
Parasympathetic- brings the body back to a normal state and allows for rest and relaxation to occur.

What are the three main types of neurons? Whh
at is the function of each?
Sensory neuron- It deals with the senses it takes the impulse towardsthe CNS to the spinal cord
Motor neuron- Carries the impulse from the CNS for an action
Interneuron- moves the impulse within the CNS.

What is the function of the axon of a nerve cell? The dendrite?
Axon- Is the sending end of a neuron
Dendrite- Is the receiving end of a neuron

What is a synapse?
Synapse- transfers the impulse from one neuron to another.

Sketch a neuron and label the axon and the dendrite.
*on a separate piece of paper!!!!