Download Unit 2-Week 1 Notes Sheets

Name: ___________________________________________________________ Hr: ______________
Unit 2: Nervous System  Week 1 Notes
Topic: ___________________________________________
Date: ____________________________
(1) Function:
- Basic Pathway:
(2) Structure:
- Made Of:
- Has a complex organization (hierarchy) of sensory and motor levels.
(3) Brain & Spine:
*Example: Paralysis
(4) Neuron:
- Neuron =
- Types:
- Basic Structural Components:
(5) Unipolar Neurons:
- Use:
- Focus: (No need to have the cell body right by dendrites…)
(6) Multipolar Neurons:
- Use:
- Focus: (Important to have cell body right next to dendrites)
(7) Junctions:
- Junction =
- Nerve Impulse  Axon  Axon Terminal  Release Neurotransmitter
(8) Nervous System Organization:
(9) Sensory Input:
-
(10)Central Nervous System (CNS):
- Includes:
-
(11)Peripheral Nervous System (PNS):
- “Middle Man” / Body Guard (between Body + CNS)
- 2 Divisions:
(12)Motor / Efferent Output:
- CNS  Effector Organ
- 2 Divisions:
(13)Somatic Nervous System:
-
(14)Autonomic Nervous System:
- Involuntary Actions:
- 2 Subdivisions:
(15)Parasympathetic Pathway:
- Normal Bodily Functions:
(16)Sympathetic Pathway:
- Bodily functions during heightened excitement…
Topic: _______________________________________________
(1) Nerve Impulses:
- Nerve Impulse =
(2) Neuron Membranes & Ions:
- Neurons have Na+ and K+ pumps w/in their membranes…
-
(3) Neuron Resting Potential:
- K+ channel a little “loose”:
- Neuron Inside =
- Neuron Outside =
- Neuron Membrane =
(4) Ion & Charge Imbalance:
- K+ ions leak out:
- Nature likes balance! Imbalance does not last naturally!
Date: ______________________
(5) Depolarization & Repolarization:
- Depolarization:
- Repolarization:
(6) Action Potential:
- Action Potential =
- Process:
(7) Regaining Resting Potential:
-
- Imbalance = Not Normal!
- Na+ and K+ Pumps active transport (using ATP) Na+ and K+ back out/in of the axon…
(8) Myelin & Action Potential:
- Myelin =
- Creates “gaps” between Na+ and K+ pumps in membrane…
(9) Videos:
- Go to YouTube  Type In “Neurotransmitter Synapse 3D Animation”
- Go to Google  Type In “Action potential propagation animation”
Topic: ____________________________________________________ Date: ______________________
(1) Reflex Arc:
- Reflex =
- Types of Reflexes:
(2) Reflex Arc Pathway:
1.
2.
3.
4.
5.
(3) Autonomic Reflexes:
- Involuntary Movement of:
- Examples:
(4) Somatic Reflexes:
-
- Examples:
(5) Brain Hemispheres:
- Hemispheres =
- Right Hemisphere controls 
- Left Hemisphere controls 
(6) Brain Lobes:
- Lobes =
- Perependicular to hemisphere line =
(7) Frontal Lobe:
(8) Parietal Lobe:
-
(9) Temporal Lobe:
- Includes:
(10)Stuff In Your Temporal:
- Thalamus, Hypothalamus, Pituitary, Limbic
- Limbic =
(11)Occipital Lobe:
-
(12)Cerebellum:
- DOES NOT MAKE MUSCLES MOVE INITIALLY!
(13)Brain Stem:
- Includes:
(14)Stuff In Brain Stem:
- Maintains Homeostasis: