1

Warm Up:

Define the following vocabulary word:

meninges (pg 901)

What do you think meningitis is?1

CHAPTER 35: Nervous System

35-3: Divisions of the Nervous System

Central Nervous System• Central nervous

system – relays messages– processes

information– analyzes

information

The Brain

• Brain: made of neurons

– controls daily operations of human body

– controls homeostasis

– interprets sensory information

• Cerebrum: largest part of brain controls the conscious activities of the body

•Brain Stem: links cerebrum with spinal cord

The Brain

•Cerebellum: coordinates muscle contraction

Thalamus & Hypothalamus

• Thalamus: relays messages

•Hypothalamus: maintains homeostasis

•Pituitary Gland: Regulates puberty

The Spinal Cord

• Spinal Cord: link between the brain & rest of the body

• Reflexes: involuntary movements

• Reflex arc: pathway your reflex impulse travels – knee tapped– sensory receptor sends

impulse to spinal cord– triggers motor neuron-

muscle contracts

The Peripheral Nervous System• SENSORY DIVISION

– Sends impulses from sense organs to central nervous system

• MOTOR DIVISION– Sends impulses

from central nervous system to muscles or glands

– 2 parts• Somatic System• Autonomic System

Ex: sight, touch

Somatic & Autonomic Nervous Systems• Somatic Nervous

System–Activities like

movement of skeletal muscle

–Under conscious control

• Autonomic Nervous System

– Involuntary, unconscious control

– 2 parts• Sympathetic– Helps body respond to stress

• Parasympathetic– Keeps body maintaining

homeostasis

10

Is it a somatic or autonomic?

• Pulling your hand

back from a hot stove

10

11

Is it a somatic or autonomic?

• Raising your hand

in class

11

Your Assignment

• Draw a Brain (pg 901)– Include the major parts of the brain: Cerebrum,

Cerebellum, Medulla Oblongata & Spinal Cord.– Include the Important glands within the brain:

Thalamus, Hypothalamus & Pituitary.

• Use color and label everything! This is going to be part of a human body poster, so make sure it is nicely done!