SC.912.L.14.21

What are the major divisions of the nervous system?

The central nervous system (CNS) is formed by the brain and spinal cord.

These elements are enclosed within the skull and spinal vertebral canal.

They are covered by the meninges, the dura, arachnoid and pia.

Two primary cell types make up the CNS - the neurons, and the glia.

Controls skeletal muscles

Cell bodies are in the brain or spinal cord and axons extend to effector

Controls Cardiac and smooth muscle

Chain of two motor neurons to reach effector.

Mobilizes the body Increases heart rate Dilates bronchioles Moves blood to

skeletal muscles away from digestive system

Releases glucose Dilates pupils

Relaxes the body Slows and steadies

heart rate Stimulates saliva Constricts bronchioles Increases smooth

muscle movement of digestive system

Description◦ A _____ is a type of _____ that …◦ Example

An eastern box turtle is a type of turtle that is commonly found in Tampa.

Compare/Contrast◦ _______ and ______ are similar in that they both……

but ________ while _______ …◦ Example

Box turtles and snapping turtles are similar in that they both omnivores, but box turtles are docile while snapping turtles will attack if handled.