1. Sponge 5
Sensory neurons: detect stimuli and transmit signals to the brain and the spinal cord
Interneurons: receive signals from sensory neurons and relay them within the brain and spinal cord
Motor neurons: pass messages from the nervous system to the other tissues in the body, such as muscles
Please use your personal experiences, or others’ experiences to give examples of each.
Ex: Sensory neurons: When I touch boiling water my sense of touch will transmit a signal to my brain. My interneurons receive the signal and process that the water is hot. My motor neurons allow me to move my hand away from the water.

2. 29.4 Central and Peripheral Nervous System
Set up Cornell Notes on pg. 43
Topic: Central and Peripheral Nervous System
Essential Question(s):
1. On pg. 42 fill out the tree map with descriptions (function/examples) of each part of the nervous system
29.4 Central and Peripheral Nervous System
2.1 Atoms, Ions, and Molecules

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

4. The Nervous System Function Function Function Function Example Example
Peripheral Nervous System (PNS)
Central Nervous System (CNS)
Function
Function
Brain
Somatic
N.S.
Spinal Cord
Autonomic
N.S.
Function
Example
Function
Example
Reflexes
Cerebellum
Brainstem
Function
Function
Cerebrum
Examples
Examples
Function
Function
Sympathetic N.S.
Parasympathetic N.S.
Examples
Pons
Function
Function
Midbrain
Function
Medulla
Oblongata
Examples
Examples
Function
Function
Examples

5. The nervous system’s two parts work together.
The Central Nervous System (CNS) includes the brain, and spinal cord. Processes information.
The Peripheral Nervous System (PNS) includes four systems of nerves and links the CNS to muscles and organs.

6. If you have a question, you will raise your hand to ask it
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.

7. The brain has three parts.
The CNS:
The brain has three parts.
1. cerebrum controls thought, movement, emotion
2. cerebellum allows for balance so body can move smoothly
3. brain stem controls basic life functions (breathing, heart beat)
Brain stem
midbrain
pons
medulla oblongata

8. 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

9. 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 nervous system: calms the body, conserves energy
sympathetic nervous system: action and stress (Fight or Flight)
*Maintain homeostasis

11. 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

12. 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

13. 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

14. Label the parts of this reflex arc:1 5 3
Spinal Cord 4 2
Key: Effector Motor Neuron Receptor Interneuron
Sensory Neuron

15. 1 Receptor
5 Effector
3 Interneuron
Spinal cord
4 motor neuron
2 Sensory neuron

16. ReceptorSensory neuron Interneuron  Motor neuronEffector