Transcript Do Now 03/03-04 - Ed White Anatomy and Physiology

Do Now 03/03-04
Thinking back to unit 3,
what is the nervous
system? What is it made
up of? What is its
purpose?
Today’s Objectives
Knowledge:
Big Idea:
O Purposes of nervous
O Knowing the purposes
system
and classifications will
O Parts of a neuron
allow students to
O Classifications of
integrate the
nervous system
knowledge of each
Skills:
day into the broader
O Ability to locate and
picture of the unit. The
name parts of a neuron
anatomy of a neuron
O Ability to assign
classification to part of
will be very important
nervous system based
background
on purpose or organs
information for this unit.
How will we master these
objectives?
Chapter 9 Outline
O I have asked that you
begin an outline for
chapter 9, and that
you define the critical
vocab on pages 212214
O A complete outline
will be due next class.
Notes and Practice
O Make sure that
you take detailed
notes and
complete all
assigned work
Notes
O Please clear your desk and take
out a clean sheet of paper
O Title your page:
O Unit 7, Nervous System: Basic
Information
Purpose of the Nervous System
1. Receive sensory information
2. Transmit sensory information
3. Integrate and process sensory
information
4. Respond to sensory information
Classifications
O Central Nervous system: brain and spine
O Peripheral Nervous system: nerves, sense
organs
O Somatic Nervous system : parts we consciously
control
O Autonomic Nervous system : parts we don’t
consciously control
O Sympathetic Nervous system: prepares us for
action/energy use
O Parasympathetic Nervous system : normal, resting
state
Neuroglial Cells
Neurological Cells far out number neurons
because they provide support, fill the spaces
and produce myelin
O Myelin: electrical insulator, produced by
neuroglia (neurological cells)
Parts of a neuron
O Axon:
O Dendrite
O Soma
O Nucleus
O Schwann cell
O Nodes of Ranvier
Diagramming a Neuron
O Use your book to diagram and label the
parts of a neuron.
O When you finish please finish your outline of
Chapter 9. This is due next class.
Do Now 04/08-09
Take your outline out and set it on your
desk.
What classification of the nervous
system would you put each of the
following:
1. Parts we control consciously
2. The nerves and sense organs
3. Part that gets us ready for action
4. Brian and spine
5. Part making your heart beat right
now
Today’s Objective
Knowledge
O How a nerve impulse
works
O Types of
neurotransmitters
O Types of impulse
patterns
Skills
O Identify important
features that allow a
nerve impulse to work
Big Idea:
O Nerves are the core
building block of the
nervous system.
Understanding how they
transmit information to
the spine and brain is an
important component of
understanding how the
nervous system works
and very important to
many nervous system
diseases.
How will we get there?
O Last class
O Today
O Notes: Basic Info
O Notes: An Impulse
O Diagramming a
O Guided Practice:
neuron
O Homework
O Chapter Outline
Diagramming
O Independent
Practice: Worksheet
Chapter 9 POP QUIZ
O Take out your
Chapter 9 Outline
O Clear your desk of all
other materials
O You will only be able
to use this resource
for your quiz
Notes
O Please take out your notes and continue
Unit 7
Unit 7: Nervous Impulse
Nerve Impulse: 6 steps
Nerves start at resting potential: High
concentrations of Na outside and high
concentration of K inside. Caused because of
differing diffusion rates. Also caused by Na/K
pump (Na out, K in). Leaves the inside of a
neuron slightly negative.
2. Neurotransmitter is received at dendrite
triggering an action potential.
3. Sodium channels open and allow sodium into
neuron (inside become neutral).
1.
Nerve Impulse: 6 steps
4. Potassium channels open and allow
potassium out (inside becomes negative
again).
5. The action potential triggers action
potentials further along the neuron
creating a wave of action potentials from
the dendrite to the axon (nerve impulse).
6. Na/K pump restores balance of ions.
Limiting Factors
O Schwann cells
prevent the
movement of ionsbecause of this, the
action potentials
only take place at
the nodes of
Ranvier. This
allows for the faster
transmission of a
nerve impulse.
Impulse Vocabulary
O When the nerve impulse reaches
the end of the axon, it will stimulate
the release of a neurotransmitter.
If that neurotransmitter increases
the chances of an action potential,
we call it excitatory. If it decreases
the chances, we call in inhibitory.
Impulse Vocabulary
O When nerve impulses move, they
can converge (come together
from many areas which is
common from many sensory
organs) or diverge (spread out
which is common when an
impulse is being sent to cause a
muscle contraction).
Guided Practice: Continue on
Notes
O Let’s diagram the stages of
the impulse together.
O This will help us to visualize a
microscopic process and help
solidify our mastery of this
standard.
Independent Practice
O Complete the following worksheet to practice
your newly acquired knowledge
O Expectations:
If its independent it means silent. Volume level 0
Use your notes and textbook for assistance first.
If you still need assistance raise your hand.
You should finish this worksheet before the end of
class.
Do Now 04/10-11
O How the nervous system processes and
responds to nerve impulses reflects the
organization of neurons in the brain and
spinal cord.
O Which vocabulary words signifies when
impulses from two or more incoming axons
combine on a single neuron?
O Which vocabulary word signifies that one
impulse passes into several output neurons?
Nervous System, Nerves
and Impulses
O Take out your worksheet assigned last class.
I will be circulating to check for credit.
O We will be going over it together.
Today’s Objectives
Knowledge:
O Parts of a reflex arc
O Functions of a reflex
arc
Skills:
O Diagram and label
the parts of a reflex
arc
Big Idea:
O The reflex arc is the
core unit of a reflex
as well as being a
great demonstration
of how neurons and
processing centers
work together and
are interconnected.
How are we going to get
there?
O Last Class
O Notes: Nerve
Impulse
O Diagramming a
Nerve Impulse
O Worksheet Practice
O Today
Reflex Function
O This system is designed for speed and
protection. It allows for a quick decision to
save the body from damage (not falling for
knee jerk to less damage from withdrawal
response). It doesn’t involve the brain in
order to save time.
Reflex Arc: Structure
O Sensory receptor:
O What receives the sensory information-many
types we will talk about on Friday.
O Sensory neuron:
O The neuron that receives the sensory info.
Goes from the sensory receptor into the
spine. Synapse in spine.
Reflex Arc: Structure
O Interneuron:
O In the spine, part of the reflex center,
processes the information quickly. Sends
response as well as info to brain. Synapse in
spine.
O Motor neuron:
O The neuron that sends the response from the
interneuron to the muscle.
O Effecter muscle:
O receive the impulse and reacts by
contracting.
Guided Practice
O Students will get into groups of 3
and diagram a reflex arc. They
will be asked to include all three
types of neurons, label the parts
of a neuron, and include the
receptor and effector as well.
Independent Practice
O Answer Check Your Recall Questions
27-30 on page 229
O If you finish early work on your
homework assignment:
O Diagram the major divisions of the brain
and spinal cord