Week #2 (1/11 – 1/15)
Warm Up – Mon, 1/11:
- NS Concept Map & A & P #2, 4 & 5
Anatomy Fun Fact:
In a child developing inside
the womb, neurons grow at
the rate of 250,000
neurons per minute.
Have out:
NS notes
Pick up:
A & P of NS Packet
NS Concept Map
Homework:
1.
2.
Agenda:
1.
Continue Nervous System notes
- Nervous tissue
2. Intro to NS Review activity
3. Complete #2, 4 & 5 on A & P of NS
Packet
3.
How Fear Works
poster project –
Tues, 1/12
Intro to NS Quiz
(Reflex Arc,
Organization &
Nervous Tissue) –
Wed, 1/13 &
Thurs, 1/14
Organization of
the NS Latin Quiz
– Fri, 1/15
SENIOR PANORAMA INFO:
• Thursday, Jan. 14th, at 8 a.m. on the practice field (subject to change if the
ground is too soft). We will line up students along the driveway & sidewalk
behind the CTE building.
• Students will line up tallest to shortest. You MUST be dressed
appropriately in order to be released for the photo!
• 7:45 – 7:50 height 5’10” and taller
• 7:50 – 7:55 height 5’6” to 5’9”
• 7:55 – 8:00 5’5” and shorter
• Order & delivery information will be sent to English 12 teachers to post in
the classroom & will be uploaded to the school website.
• Students will return to their 2nd hr.
Gruesome medical discoveries & procedures (~45 mins)
Medical Procedures & the Brain
• How do we know about the
brain, its regions, parts &
functions?
• How have we been able to
diagnose problems within
the nervous system?
• Where & how did the first
medical procedures
investigating the nervous
system occur?
• Made up primarily of 2 types
of cells:
• Neurons (nerve cells)
• Supporting cells
• CNS - neuroglia
• PNS – satellite cells,
Schwann cells
Gray matter
White matter
Central Canal
REVIEW: Functional Classification
• Neurons are grouped according to the direction in which
the nerve impulse travels relative to the CNS
• Based on this, there are sensory, motor & association
neurons
▫ Sensory – transmit impulses
from skin or other organs
toward CNS
▫ Motor – carry impulses away
from CNS to effector organs
▫ Association (interneurons) –
lie between motor & sensory
neurons
• First let’s have a look at the functional &
structural unit of the NS…the neuron
Week #2 (1/11 – 1/15)
Warm Up – Tues, 1/12:
- Review of a Reflex Arc
Anatomy Fun Fact:
By the time of its birth, a baby's brain
consists of around
10 million nerve
cells.
Pick up:
Symbol placard
Turn in:
How Fear Works
poster project
 Make sure your
NAME is on Rubric
 Put it at side
counter between
Lab 5 & 6
Homework:
1.
Agenda:
1. Finish Nervous Tissue notes
2. Review activity
2.
Intro to NS Quiz
(Reflex Arc,
Organization &
Nervous Tissue) –
Wed, 1/13 & Thurs,
1/14
Organization of the
NS Latin Quiz –
Fri, 1/15
Warm-up: A Reflex Arc
• Function: Specialized to conduct information from one part
of the body to another
• Many different types of neurons
• Most have certain structural &
functional characteristics:
- Cell body (soma)
- One or more specialized, slender
processes (axons & dendrites)
- Input region (dendrites & soma/
body)
- Conducting (“sending”)
component (axon)
- Secretory/output
region (axon terminal)
Neuron (Nerve Cell)
Structure
• Made up of a cell bodies,
dendrites & axons
• Cell body (or soma)
• Contain large nucleus &
rough E.R. (site of protein
synthesis)
• Most located within CNS (protected by bones of skull &
vertebral column)
• Collection in CNS is called “nuclei” whereas in PNS they
are called “ganglia”
Neuron (Nerve Cell) Structure
• Dendrites
• Short, thin, highly branched
receptive regions of nerve
cell
• Increase surface area of neuron
to increase ability to
communicate with other
neurons
• Convey incoming message
toward the cell bodies
through the use of graded
potentials – similar to action
potentials (AP)
Neuron
(Nerve Cell)
Structure
• Axon: Each neuron
has only one
• Impulse generating &
conducting region of neuron
• Convey AP (info) away from the cell body toward end of
axon
• Originates from a special region of the cell body called the axon
hillock
• Axon terminal/synaptic knob – end of axon which contains
synaptic vesicles (membranous bags of neurotransmitters)
• Arrival of AP at axon terminal/synaptic knob causes NTs to be
released
Myelin Sheath of
the Axon
• Whitish, fatty protein layer
• Serves to protect & electrically
insulate axon
• Increases the speed of
transmission of nerve impulses
(up to 150 times faster)
• Only associated with axons, not
dendrites
• Neurilemma: outmost covering
of the axon (surrounds Myelin
sheath)
Neurons - a Microscopic Look
Where is/are the…?
• Soma – cell body
• Nucleus
• Dendrites
• Axons
• Are you able to Identify/
Label:
•
•
•
•
•
•
(soma)
Dendrites
Cell body (soma)
Nucleus of the neuron
Axon
Myelin sheath
Neurilemma (axon outer
covering)
• Terminal endings/axon
terminals
• Synaptic knobs
Terminal ending/axon terminals/
synaptic knobs
The Supporting Neural Tissue –
Neuroglia (CNS)
• Neural tissue within CNS & PNS
differ greatly
• Outnumber neurons by about 10
to 1
• Eistein (& others) had an
inordinate amount of them
• CNS has 4 different types of
supporting cells (neuroglia)
• Abundant & diverse
• Limited knowledge of each
function due to difficulty in
isolating individual cells
Nervous System
Review Activity
• In your new lab groups,
• Discuss & complete answers to the specific section of the
A & P of Animal Nervous System wkst assigned to you &
then share out the information with your group.
• As we share out our sections, others should be
listening & writing answers.
• This wkst is your STUDY
GUIDE for Nervous System
Quiz #1!
•
•
•
•
Palm Tree: Section 3 (#1-6)
Money: Section 3 (#7-12)
Hockey Smilie: Section 7
Butterfly: Section 10