What is it and how does it work???

Slides:

Advertisements

Similar presentations

The Nervous System Chapter 35.

Advertisements

By: Alexandria J Max M Imanol S

NERVOUS SYSTEM Coordinates all activities in the body by transmitting messages back and forth to every cell of the body through nerves.

Nervous System. Parts of the Nervous System Brain Spinal Cord Nerves.

WARM UP: Turn your Endocrine System Homework to the homework basket. Get an article from the front stool. Read the article & answer the questions on the.

35-3 Divisions of the Nervous System

Nervous System. How did our nervous system work in the Impulse Activity we just completed? How did our nervous system work in the Impulse Activity we.

Nervous System.

What’s Next in Biology Class?. Optical Illusion 1 Optical Illusion 12.

Human Nervous System Most Remarkable Communication Center

Nervous System. Parts of the Nervous System Brain Spinal Cord Nerves.

Stimuli and Response-Notes

Nervous System.

THE NERVOUS SYSTEM Definition: A network of billions of nerve cells linked together to form the rapid control center of the body. Main function: Integrating.

DO NOW : List as many functions of the brain as you can. How do you think the brain coordinates all the different activities? Objectives: 1.Describe the.

HUMAN RESPONSES TO THE ENVIRONMENT Two systems to be studied: 1.Nervous system 2.Endocrine system.

What life function does the nervous system help to carry out?

Section 35-3: Divisions of the Nervous System

The Nervous System Function of the Nervous System 1. Receives information about what is happening both inside and outside your body. 2. Directs the way.

29.4 Central and Peripheral Nervous Systems KEY CONCEPT The central nervous system interprets information, and the peripheral nervous system gathers and.

The Nervous System. Neurons  The neuron is the functional unit of the nervous system. Humans have about 100 billion neurons in their brain alone!  While.

Main Function: This communication system controls and coordinates functions throughout the body and responds to internal and external stimuli. Our nervous.

Main Function: This communication system controls and coordinates functions throughout the body and responds to internal and external stimuli. Our nervous.

The Nervous System. Functions of the Nervous System the center of all thought, learning and memory.

The Human Body The Nervous System

Main Function: This system controls functions throughout the body and responds to internal and external stimuli. Our nervous system allows us to feel.

THE NERVOUS SYSTEM BY Kayla Lowery. MAJOR FUNCTIONS! SOME OF THE MAIN FUNCTIONS OF THE CENTRAL NERVOUS SYSTEM AND THE PERIPHERAL SYSTEM ARE:  To control.

The Nervous System. Functions of the Nervous System Control center for all body activitiesControl center for all body activities Responds and adapts to.

29.4 Central and Peripheral Nervous Systems Set up Cornell Notes on pg. 51 Topic: 29.4 Central and Peripheral Nervous System Essential Question(s): 1.

Nervous System Overview. Divided into Two Parts: Central (CNS) Peripheral (PNS)

The eleven organ systems of the human body work together to maintain homeostasis Homeostasis is the internal balance of the body Within the body are levels.

Prime Time: On the back of What am I? complete the following… 1) Trace the outline of a penny in 12 different places on a piece of paper. 2) Number the.

The Nervous System. Functions of the nervous system include:  coordination of the physical movements of the body  corresponding to the action of the.

Nervous System. NERVOUS SYSTEM Two Parts Central (CNS) Peripheral (PNS)

Nervous System Carries messages to and from the brain and spinal cord and all other parts of the body.

The Nervous System Miss Charney Northville Central School Miss Charney Northville Central School.

The Nervous System 1.Control center for all body activities 2.Responds and adapts to changes that occur both inside and outside the body (Ex: pain, temperature,

The Nervous System.

Nervous System. What does the nervous system do? The nervous system picks up messages from in and out of the body and turns them into signals that coordinate.

Our electrochemical controls

EQ: How do organ systems work together to enable an organism to maintain homeostasis?

NERVOUS SYSTEM.  Functions: 1. Receives information about what is happening inside & outside of the body. 2. Directs the way your body responds to this.

The Human Nervous System. The Nervous System has TWO Major Divisions. The Central Nervous System The Peripheral Nervous System.

The Nervous System Physiology Unit CA Biology Standard 9.

The Nervous System. Lesson objectives By the end of this lesson you should know: The difference between the CNS and the PNS The function of the nervous.

The Nervous System By: Kevin Caro and Joyce Perez.

Regents Biology The Nervous System: Overview  The Nervous System controls and coordinates all the functions of the body.  The Nervous System.

Receives information about environment and what happens inside your body Directs how body responds to information Maintains homeostasis.

Human Physiology: The Nervous System PPT #2 chapter 29 in text.

Chapter 24 Regulation. Why do you respond to changes around you? Your responses are controlled by your nervous and endocrine system. Together these 2.

The Nervous System. Reacting to Stimuli  In order to maintain homeostasis and survive your body has to be able to react to changes in the environment.

The Nervous System Nervous Regulation – Allows you to respond to changes (STIMULI) in the environment (MAINTAIN HOMEOSTASIS)

Lesson Overview Lesson Overview The Central Nervous System Lesson Overview 31.2 The Central Nervous System.

Dec 2, 2010“A” Day Objective: Students will make models of the central and peripheral nervous system in order to explain their functions. Warm-up: Fig.

The Nervous System - receives, transmits and stores information in order to coordinate body functions so that they work in harmony. - is composed of a)

Click on a lesson name to select. Chapter 33 Nervous System Section 1: Structure of the Nervous System Section 2: Organization of the Nervous System.

The Nervous System Chapter 31

Aim: How does the nervous system control activities in the body?

NERVOUS SYSTEM BY: HANI & NIK ////////////////////////// /////////////////////////// //////// /////// ////////

Nervous System. Meet Your Nervous System You have about 150 billion brain cells Your brain is about 2% of your body’s weight, but it uses about 20% of.

 Central Nervous System (CNS)  Peripheral Nervous System (PNS)

Questions of the Day “ WHAT MAKES YOU WHO YOU ARE ? ” Why are you different from Everyone Else” What makes you so similar?

The Nervous system.

Control of our body...

Nervous System Notes.

ACOS 3 Relate major tissues and organs of the skeletal, circulatory, reproductive, muscular, respiratory, nervous, and digestive systems to their functions.

The Nervous System.

The Nervous System.

The Nervous System.

Presentation transcript:

What is it and how does it work??? NERVOUS SYSTEM What is it and how does it work???

Nervous System Basics The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts.

The nervous system is divided into the CNS and the PNS. 1 The nervous system is divided into the CNS and the PNS. 1. CNS (Central Nervous System) which is the brain and spinal cord 2. PNS (Peripheral Nervous System) which consists of all of the nerves that lie outside of the CNS

Central Nervous System The brain and spinal cord form the control center known as the central nervous system (CNS), where information is evaluated and decisions made.

Peripheral Nervous System (PNS) The sensory nerves (neurons) and sense organs of the peripheral nervous system (PNS) monitor conditions inside and outside of the body and send this information to the CNS. Motor neurons in the PNS carry signals from the control center to the muscles, glands, and organs to regulate their functions.

BRAIN Center of the nervous system Coordinates all of the body’s activities Most complex organ in the human body Made of approximately 100 billion nerve cells (neurons) Three major parts are the cerebrum, cerebellum, and brain stem Cerebrum: higher brain functions, interpreting sensory impulses, and initiating muscle movements; stores information Cerebellum: helps to control motor functions such as balance, posture, and coordination of complex muscle activities Medulla: processes involuntary body functions related to homeostasis; monitors blood pressure and oxygen levels and regulates heart rate, controls the rate of breathing, vomiting, sneezing, coughing, and swallowing reflexes

NERVE CELLS ARE CALLED NEURONS!!! *How do messages from the brain reach all parts of the body? *How do messages from all parts of the body reach the brain? NERVE CELLS ARE CALLED NEURONS!!!

The messages are carried through electrical and chemical signals The messages are carried through electrical and chemical signals. The messages can travel at slightly different rates but some have been recorded to travel up to 250 mph (366.7 feet per second)!!! (Messages to muscles for coordination are some of the fastest while those for pain are some of the slowest) How a Neuron Fires (video) http://www.youtube.com/watch?v=C4Gt322-XxI

How does your body/brain know what to react to in order to maintain homeostasis? The nervous system maintains homeostasis by controlling and regulating the other parts of the body. A deviation from a normal set point acts as a stimulus to a receptor, which sends nerve impulses to a regulating center in the brain. The brain sends information to act in such a way that a response to the stimulus occurs. (Hmmm…respond to stimuli, adapt to changes, we have heard this before…think, characteristics of living things) Example: receptors throughout the body are constantly sensing temperature, if the temperature deviates away from the average 98.6º F, neurons take the information to the hypothalamus in the brain and the information is interpreted, then a response in sent to parts of the body to react in a specific way was a lowering of body temperature, the effector acts to increase body temperature.

What helps the brain receive information from outside the body? The sensory organs (the five senses). Sight Hearing Touch Taste Smell

Reflex vs. Reaction Reflex Examples Reaction is voluntary while reflex is involuntary Reaction takes place through sensory nerves that bring back messages from the brain to the motor nerve. In a reflex reaction, sensory nerves bypass the brain and go up to the spinal cord. This is why a reflex is faster than a reaction. Reflex Examples

NERVOUS SYSTEM FUN FACTS - There are more nerve cells in the human brain than there are stars in the Milky Way. - If we lined up all the neurons in our body it would be around 600 miles long. - A newborn baby's brain grows almost 3 times during the course of its first year. - The left side of human brain controls the right side of the body and the right side of the brain controls the left side of the body. - A new born baby loses about half of their nerve cells before they are born. - As we get older, the brain loses almost one gram per year. - There are about 13, 500,00 neurons in the human spinal cord.