Transcript Warmup 11/11/13 - American Academy

TAKE OUT A SCRAP SHEET OF
PAPER PLEASE 
Warmup 11/11/13
List as many functions of the brain as you can.
Don’t forget that in addition to controlling your
body, your brain is also occupied with thinking.
How do you suppose your brain can coordinate all
these functions?
Warmup
11/12/13
Record
1. Compare the reaction times of your own
hands. Why might one hand react more quickly
than the other?
2. Compare your results with your partner’s. Why
might one person react more quickly than
another?
Brainpop…
Nervous System
Objectives:
1.What does the nervous system do?
2.What is the structure of the
nervous system?
Nervous System Functions
1.Collects information and decides what
the information means
2.Responds to the information it has
collected
CNS vs. PNS
CNS (Central Nervous System)-includes brain and
spinal cord
Function: takes in and responds to information from
the PNS
PNS (Peripheral Nervous System)- includes all the
other parts
Function: connects all parts of the body to the CNS
How Does The Information Move?
Read page 394, Chapt 25 Sect 1 and
summarize this process
Neurons (special cells)
1.Impulses (electrical messages) travel from
dendrites (parts of the neuron that branch
from the cell body) to the cell body (which
contains the nucleus and organelles)
2.Impulses then travel from cell body to the
axons (longer than dendrites-carry info to
other cells)
Math Practice
To calculate how long an impulse takes to travel a
certain distance, you can use the following equation:
time=distance/speed
If an impulse travels 100m/s, about how long will it take
the impulse to travel 10 meters?
Math Practice
Use the equation to answer the following question:
time=distance/speed
If an impulse has a speed of 38m/s, about how long did
it travel if it only took the impulse 30seconds to get
there?
Define The Following (use your book starting on
page 393-Chapter 2):
1.Sensory neurons
2.Motor neurons
3.Nerves
4.Somatic nervous system
5.Autonomic nervous system
Define The Following:
1. Sensory neurons-carry info about what is happening in and
around your body to the CNS
2. Motor neurons-carry impulses from the CNS to other parts
of your body
3. Nerves-groups of axons wrapped together with blood
vessels and connective tissue
4. Somatic nervous system-motor neurons in the PNS that you
control (like voluntary muscles)(ex: walking, writing,
talking)
5. Autonomic nervous system-motor neurons in the PNS that
you cannot control (ex: digestion, heart beating)
Parts Of The Nervous System
1. Brain (largest organ)-three main parts: cerebrum,
cerebellum, medulla
2. Cerebrum (cerebral cortex is part of this-the grey
matter)-largest part of the brain where you think
and most memories are kept. Made up of two
hemispheres. The left side controls movement on
right side of the body. This includes speaking,
reading, solving problems. The right side controls
music and interpreting emotions
3. Cerebellum-receives and processes
information from your body such as from your
skeletal muscles and joints. Helps with
balance
4. Medulla-part that connects to spinal cord.
Controls heart rate and breathing.
5. Spinal cord- surrounded by vertebrae,
made of neurons that send impulses to and
from brain
Parts of the Brain
Questions for Class (Copy Question and write the
answer)
1. What are the two main parts of the nervous system?
2. Predict what would happen if your nerves stopped working
3. How does eating a piece of pizza involve both the somatic
and autonomic nervous systems?
4. Which hemisphere of your brain are you mainly using as
you read this question? Explain.