3/25/2013

Starter:

99 100 Communication Systems Notes

connection/exit:Summarize your notes in a minimum of 4 to 5 sentences

Practice/Application

Paste Notes here when done

3/26/2013

Define the following: a. Nervous System b. Endocrine System

Communication Systems Notes

March 25, 2013

AGENDA Objective 7.12 B Identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems by completing endocrine/nervous system notes

1. Starter2. Nervous/Endocrine system notes3. Exit

Table of Contents

Date Lecture/ Activity/ Lab Page2/22-25 Heart Foldable 75-762/26 Digestive/Excretory Notes 77-782/27 Digestive/Excretory Vocabulary 79-

802/28 Cells CBA Review 81-823/1 Digestive System Corp Letter 83-843/4-6 Digestive System Ws 85-863/6-8 Excretory System Ws and Lab 87-883/18 Body Systems Match 89-903/19 Integumentary Notes 91-923/20 Integumentary Diagram/Voc 93-943/21 Integumentary System Ws 95-963/22 Immune System Ws 97-983/25 Endocrine/Nervous Notes 99-

100

 

3/25/2013

Starter:

99 100 Communication Systems Notes

connection/exit:Summarize your notes in a minimum of 4 to 5 sentences

Practice/Application

Paste Notes here when done

3/26/2013

Define the following: a. Nervous System b. Endocrine System

Communication Systems Notes

Main Function: To control and

coordinate functions throughout the body

and respond to internal/ external

stimuli.

Our nervous system allows us to feel pain.

Consists of: brain, spinal cord, nerves and sense organs

Sense Organs: Eyes, Skin, Ears, Nose & Tongue

A nerve is an organ containing a bundle of nerve cells called neurons, which carry electrical messages called impulses throughout the body. Picture shows

hundreds of severed neuron axons

cellbody

muscle tissue

TYPICAL MOTOR NEURON

Axondendrite

synapse

cell body

Because neurons never touch, chemical signalers called neurotransmitters must travel through the space called synapse between two neurons to help send messages.

Neurotransmitters

Synapse (gap)

The message is transferred when RECEPTORS receive neurotrans-mitters.

(pinkspheres)

1. Cell body: contains nucleus & most of the cytoplasm

2. Dendrites: projections that bring impulses into the neuron to the cell body.

3. Axon: long projection that carries impulses away from cell body

Parts of a Neuron

1

32

Sensory

Neuron

Interneuron

Motor Neuron

Sensory Neuron

Interneuron

Motor Neuron

Muscle Contracts

Synapse

Synapse

Synapse

Sensory Neuron

carry impulses from sense

organs to spinal cord & brain

Fun Fact:

Where can the largest cells in the world be

found?

The giraffe’s sensory and motor neurons!

Some must bring impulses from the

bottom of their legs to their spinal cord

several meters away!!

Interneuron

-processes impulses in brain and spinal cord

- connect sensory and motor neurons

Motor Neurons

carry impulses from the brain & spinal cord to muscles &

glandsAxon End

Axons branching out to muscle

fibers

Nerves work together with muscles for movement. An impulse begins when one neuron is stimulated by another neuron or by the sense organs.

The impulse travels down the axons of Sensory neurons to the brain cells called Interneurons.

The brain will then send an impulse through motor neurons to the necessary muscle or organs, telling it to contract.

A reflex is an involuntary

response that is processed in the spinal cord not the

brain.

Reflexes protect the body before

the brain knows what is

going on.

Reflex Arc

brain

Spinal Cord

Cerebellum

Cerebrum

Medulla Oblongata

Consists of: Brain and Spinal Cord

Cerebrum Voluntary or conscious activities of the body-learning, judgment

Cerebellum Coordinates and balances the actions of the muscles

Medulla Oblongata (Brain Stem)

Controls involuntary actions like blood pressure, heart rate, breathing, and swallowing

Spinal CordThe main communications link

between the brain and the rest of the body

Consists of:

all sensory neurons,

motor neurons,

and sense organs

 

3/25/2013

Starter:

99 100 Communication Systems Notes

connection/exit:Summarize your notes in a minimum of 4 to 5 sentences

Practice/Application

Paste Notes here when done

3/26/2013

Define the following: a. Nervous System b. Endocrine System

Communication Systems Notes