29.4 Central and Peripheral Nervous Systems Set up Cornell Notes on pg. 35

•Topic: 29.4 Central and Peripheral Nervous System

•Essential Question(s):

1. Draw your own example of a reflex arc

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

• Share your Tree Map with your Table

• Choose the one you like the best

• Be ready to share (assign a reader)

Types of Neurons “Story” Tree Map

29.4 Central and Peripheral Nervous Systems

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

29.4 Central and Peripheral Nervous Systems

Parts of the Nervous System Tree Map

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

p.885-890

29.4 Central and Peripheral Nervous Systems

The Nervous System :Components and Function (2m41s)

• Add at least 5 additional notes to your tree map

29.4 Central and Peripheral Nervous Systems

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.

29.4 Central and Peripheral Nervous Systems

• 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:

29.4 Central and Peripheral Nervous Systems

• 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

29.4 Central and Peripheral Nervous Systems

• 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

29.4 Central and Peripheral Nervous Systems

10

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

29.4 Central and Peripheral Nervous Systems

Reflexes (55s)

29.4 Central and Peripheral Nervous Systems

12

2

3

4

Spinal Cord

5

6Label the parts of this reflex arc:

Key: Effector Motor Neuron Receptor Interneuron Sensory Neuron Stimulus

1

29.4 Central and Peripheral Nervous Systems

13

2 Receptor

3 Sensory neuron

4 Interneuron

5 motor neuron

6 Effector

Spinal cord

1 Stimulus

29.4 Central and Peripheral Nervous Systems

CNS: The Spinal Cord (2m57s)

29.4 Central and Peripheral Nervous Systems

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

29.4 Central and Peripheral Nervous Systems

Adrenaline: Flight or Fight Response (6m36s)

29.4 Central and Peripheral Nervous Systems

29.4 Central and Peripheral Nervous Systems

• 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.

29.4 Central and Peripheral Nervous Systems

The Peripheral Nervous System (3m)

29.4 Central and Peripheral Nervous Systems

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.

29.4 Central and Peripheral Nervous Systems

EQ: Make your own reflex arc P. 34

21

• Make sure to label all parts• Name the receptors/effectors involved• CANNOT deal with a burn

29.4 Central and Peripheral Nervous Systems

22

ReceptorSensory neuron Interneuron Motor neuronEffector

29.4 Central and Peripheral Nervous Systems

Nervous System- Frog Dissection (4m50s-14m33s)