TAKE OUT A SCRAP SHEET OF PAPER

PLEASE

Warmup 11/11/13List 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 SystemObjectives:1.What does the nervous system do?2.What is the structure of the

nervous system?

Nervous System Functions1.Collects information and decides what

the information means2.Responds to the information it has

collected

CNS vs. PNSCNS (Central Nervous System)-includes brain and spinal cordFunction: takes in and responds to information from the PNS

PNS (Peripheral Nervous System)- includes all the other partsFunction: 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 neurons2.Motor neurons3.Nerves4.Somatic nervous system5.Autonomic nervous system

Define The Following:1. Sensory neurons-carry info about what is happening in and

around your body to the CNS2. Motor neurons-carry impulses from the CNS to other parts

of your body3. Nerves-groups of axons wrapped together with blood

vessels and connective tissue4. 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 System1. Brain (largest organ)-three main parts: cerebrum,

cerebellum, medulla2. 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 balance4. 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.