29.4 central and peripheral nervous systems set up cornell notes on pg. 51 topic: 29.4 central and...

29.4 Central and Peripheral Nervous Systems Set up Cornell Notes on pg. 51•Topic: 29.4 Central and Peripheral Nervous System

•Essential Question(s):

1. On pg. 50 fill out the tree map with descriptions (function/examples) of each part of the nervous system

2.1 Atoms, Ions, and Molecules

29.4 Central and Peripheral Nervous System

KEY CONCEPT The central nervous system interprets information, and the peripheral nervous system gathers and transmits information.

29.4 Central and Peripheral Nervous Systems

The Nervous System

Central Nervous System (CNS) Peripheral Nervous System (PNS)

Brain Spinal Cord Somatic N.S.

Autonomic N.S.

Cerebrum

Cerebellum

Brainstem

Sympathetic N.S. Parasympathetic

N.S.

Reflexes

Function

Function

Function

Function

Function Function

FunctionExample

FunctionExample

Function

Function

Midbrain Pons

Medulla

Oblongata Function

Function

Function

Examples

Examples

Examples

Examples

Examples Examples


KEY CONCEPT The central nervous system interprets information, and the peripheral nervous system gathers and transmits information.


The nervous system’s two parts work together.

• The Central Nervous System (CNS) includes the brain, and spinal cord.

• Function: Processes information

• The Peripheral Nervous System (PNS) includes four systems of nerves

• Function: links the CNS to muscles and organs.


• The brain has three parts.

1. cerebrum controls thought, movement, emotion

2. cerebellum located in back of skull, balances the actions of muscles so body can move smoothly

midbrainpons

medulla oblongata

3. brain stem controls basic life functions (breathing, heart beat)

Brainstem

The CNS:


• The brain stem has three parts.

– midbrain controls some reflexes

– pons regulates breathing – medulla oblongata connects

the brain and spinal cord and controls heart function, swallowing, coughing, vomiting

midbrain

medulla oblongata

pons


The somatic nervous system regulates voluntary movements

Ex: Walking

– sympathetic nervous system: action and stress (Fight or Flight)

– parasympathetic nervous system: calms the body, conserves energy

The autonomic nervous system controls involuntary functionsEx: Digestion

The Peripheral Nervous System: Collection of nerves that links the CNS to muscles and other organs

(Sensory neurons/motor neurons)

*Maintain homeostasis


• The CNS and PNS pass signals between one another.

1. Sensory receptors in PNS generate an impulse

• PNS passes impulse to CNS

3. PNS stimulates a response

2.CNS interprets impulse

• CNS passes impulse to PNS.


If you have a question, you will raise your hand to ask it. How do your CNS and PNS work together to allow you to raise your hand?

Your CNS passes a signal to a motor neuron in your PNS causing you to raise your hand.


11

Reflex arc- A simple pathway, including only a few neurons, that carry out the simplest responses…reflexes.

Reflexes – automatic, subconscious responses to external or internal stimuli

• Maintain homeostasis by controlling: heart rate, breathing rate, blood pressure, digestion, swallowing, sneezing, coughing, and vomiting


• The spinal cord controls reflexes.

– sensory neuron sends impulse to spinal cord– spinal cord directs impulse to motor neuron – does not involve the brain!!!!

interneuron

motor neurons

sensory neuron

Stimulus


13

2

3

4

Spinal Cord

5

6Label the parts of this reflex arc:

Key: Effector Motor Neuron Receptor Interneuron Sensory Neuron Stimulus

1


14

2 Receptor

3 Sensory neuron

4 Interneuron

5 motor neuron

6 Effector

Spinal cord

1 Stimulus


15

ReceptorSensory neuron Interneuron Motor neuronEffector

29.4 central and peripheral nervous systems set up cornell notes on pg. 51 topic: 29.4 central and...

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