1. Unit 3: Integration Station: The Nervous System
Chapter 9
Part 1: Organization of the Nervous System
Part 2: Nervous Tissue: Structure & Function
Part 3: The Synapse
Part 4: Peripheral Nervous System
Part 5: Developmental Aspects of the Nervous System & Drug Use

2. The Nervous System Part 3: The Synapse
Human Anatomy & Physiology
The Nervous System Part 3: The Synapse
Unit 3: Integration Station: The Nervous System

3. Do now: 9.5 Objective: Think Ink…Pair Share
Unit 3: Integration Station: The Nervous System
9.5
Aim: What is a signal transmission?
AGENDA
Introduction
Mini-Lesson
Summary
Work Period
Exit Slip
Do Now
Objective:
I will identify the general parts of a synapse and describe a signal transmission.
SC.912.L.14.24
Do now:
Think Ink…Pair Share

4. 9.5 Aim: What is a signal transmission? Real-world connection
Unit 3: Integration Station: The Nervous System
9.5
Aim: What is a signal transmission?
Real-world connection
How drugs interact with the nervous system.
Vocabulary
nerve pathways, synapse, synaptic cleft, synaptic transmission, neurotransmitters, resting potential, action potential, reflex arc, receptor, sensory neuron, interneuron, motor neuron, effector.
AGENDA
Introduction
Mini-Lesson
Summary
Work Period
Exit Slip
Do Now

5. Unit 3: Integration Station: The Nervous System
Axons and Nerve Impulses
Nerve impulses travel along complex nerve pathways.
The junction between any two communicating neurons is called a synapse.
The neurons are not in direct contact, but are separated by a gap called a synaptic cleft.
Unit 3: Integration Station: The Nervous System
Slide 7.11

6. Unit 3: Integration Station: The Nervous System
Nerve Impulses
The process of crossing the synaptic cleft with a message is called synaptic transmission.
Synaptic transmission is a one way process using chemicals called neurotransmitters.
Unit 3: Integration Station: The Nervous System

7. Objective: I will identify the parts of a reflex arc. SC.912.L.14.23
Unit 3: Integration Station: The Nervous System
9.11
Aim: What is a reflex arc?
AGENDA
Introduction
Mini-Lesson
Summary
Work Period
Exit Slip
Do Now
Objective:
I will identify the parts of a reflex arc.
SC.912.L.14.23
Do now:

8. 9.11 Aim: What is a reflex arc? Real-world connection
Unit 3: Integration Station: The Nervous System
9.11
Aim: What is a reflex arc?
Real-world connection
How drugs interact with the nervous system.
Vocabulary
nerve pathways, synapse, synaptic cleft, synaptic transmission, neurotransmitters, resting potential, action potential, reflex arc, receptor, sensory neuron, interneuron, motor neuron, effector.
AGENDA
Introduction
Mini-Lesson
Summary
Work Period
Exit Slip
Do Now

9. 9.11
Reflex Arcs
The simplest of our nerve pathways which includes on a few neurons is called a reflex arc.
Reflex arcs are essential for involuntary actions called reflexes.
Reflexes are automatic responses to changes within or outside the body.
Examples
Involuntary: heart rate, breathing, blood pressure, digestion
Automatic actions: swallowing, sneezing, coughing and vomiting

10. Reflex Arc

11. Classification of Neurons
Classified two ways:
Function (direction the impulse is traveling relative to the CNS…to or from)
Structure (# of processes extending from cell body)
FUNCTIONAL CLASSIFICATION
Sensory (afferent) neurons
Carry impulses from the sensory receptors
Motor (efferent) neurons
Carry impulses from the central nervous system

12. Functional Classification of Neurons
Interneurons (association neurons)
Found in neural pathways in the central nervous system
Connect sensory and motor neurons

13. Animations

14. Neurotransmitters
Excitatory - increase membrane permeability, increases chance for threshold to be achieved
Inhibitory - decrease membrane permeability, decrease chance for threshold to be achieved

15. Types of Neurotransmitters
Acetylcholine - stimulates muscle contraction
Monoamines - Norepinephrine & Dopamine (sense of feeling good. Low levels = depression)
Serotonin (sleepiness)
Endorphins (reduce pain, inhibit receptors)