Download 29.4 Central and Peripheral Nervous Systems The

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Cornell Notes
on pg.
29.4upCentral
and Peripheral
Nervous Systems
35
29.4
Central
2.1
Atoms,
Ions,and Peripheral Nervous
and Molecules System
•Topic: 29.4 Central and
Peripheral Nervous System
•Essential Question(s):
1. Draw your own example
of a reflex arc
KEY CONCEPT
The central nervous system
interprets information, and
the peripheral nervous
system gathers and transmits
information.
29.4 Central and Peripheral Nervous Systems
Types of Neurons “Story” Tree Map
• Share your Tree Map with your
Table
• Choose the one you like the best
• Be ready to share (assign a reader)
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)
Function
Function
Brain
Spinal Cord
Reflexes
Cerebellum
Cerebrum
Function
Function Brainstem
Examples
Function
Function
Examples
Somatic
N.S.
Autonomic
N.S.
Function
Example
Function
Example
Sympathetic N.S.
Examples
Parasympathetic
N.S.
Pons
Midbrain
Function
Function Medulla
Oblongata
Function
Examples
Function
Examples
Function
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 CNS:
• 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
3. brain stem
Brain
stem
controls basic life
functions
(breathing, heart
beat)
midbrain
pons
medulla
oblongata
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
pons
medulla
oblongata
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
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
10
29.4 Central and Peripheral Nervous Systems
Reflexes (55s)
29.4 Central and Peripheral Nervous Systems
Label the parts of this reflex arc:
2
6
4
1
Spinal Cord
5
3
Key: Effector Motor Neuron
Sensory Neuron Stimulus
Receptor Interneuron
12
29.4 Central and Peripheral Nervous Systems
2 Receptor
6 Effector
4 Interneuron
1 Stimulus
Spinal cord
5 motor
neuron
3 Sensory neuron
13
29.4 Central and Peripheral Nervous Systems
CNS: The Spinal Cord
(2m57s)
29.4 Central and Peripheral Nervous Systems
The Peripheral Nervous System: Collection of nerves
that links the CNS to muscles and other organs
(Sensory neurons/motor neurons)
The somatic nervous
system regulates
voluntary movements
Ex: Walking
The autonomic nervous system
controls involuntary functions
Ex: Digestion
– parasympathetic – sympathetic nervous
system: action and
nervous system:
stress (Fight or Flight)
calms the body,
conserves
energy
*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
2.CNS interprets
impulse
• CNS passes
impulse to PNS.
3. PNS stimulates a
response
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
• Make sure to label all parts
• Name the receptors/effectors involved
• CANNOT deal with a burn
21
29.4 Central and Peripheral Nervous Systems
ReceptorSensory neuron Interneuron  Motor neuronEffector
22
29.4 Central and Peripheral Nervous Systems
Nervous System- Frog Dissection (4m50s-14m33s)