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The Nervous System. Good Morning…. Bell Ringer #1: Reflect back over winter break . . Bell Ringer #2. Review your notes from last class. Answer the following question using those notes:
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Good Morning… • Bell Ringer #1: • Reflect back over winter break.
Bell Ringer #2 • Review your notes from last class. • Answer the following question using those notes: • How did your nervous system help you conduct the activity you did in the computer lab (red light/green light activity)? • Yes, this is the same question you answered for bell ringer number 1. Use what you learned last class to add to or change your answer from bell ringer #1.
Bell Ringer #3 • For each profession, tell me if the individual would most likely be right-brained or left-brained. • Architect • Writer of Fiction Books • Mathematician • Art Teacher • Engineer • Musician • Lawyer • Scientist
Bell Ringer 4 – Read the following passage… • While lying in bed one night, John heard a barking noise that seemed to be coming from outside. He looked out the window and saw his yellow lab named Murphy had gotten loose! As he rushed down the stairs to fetch Murphy, John tripped and fell to the bottom of the stairs. He was in a great deal of pain! He then managed to make his way to the bathroom to take some pain relievers. John read the label on the bottle – he was to take 2 pills.
Bell Ringer 4 con’t… • After reading the story, explain how John may have used ALL 4 lobes of the cerebrum during this mishap! Use your notes!
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The Nervous System • 1. Two main divisions • a. Central Nervous System (CNS) – consists of brain and spinal cord • b. Peripheral Nervous System (PNS) – includes nerves extending from brain and spinal cord • c. The CNS receives messages from the PNS, interprets them, and then sends out a response.
Neurons • 2. Neurons - nerve cells that transmit messages to and from the spinal cord and brain • a. Sensory Neurons – carry messages FROM body TO CNS • ex. Playing games in computer lab. When light switches to green, a sensory neuron transmits a message from your eye to your brain
Neurons • b. Motor Neurons – carry message TO body FROM CNS • ex. Your brain sends a signal through a motor neuron to tell your finger to click the mouse. • c. Interneurons – connect neurons
3. Structure and Functions of Neurons • 1. Dendrites – receive information and transmit impulses toward cell body • 2. Cell Body – large area which contains cell nucleus or power plant • 3. Nucleus – command center of the neuron
4. Axon – transmit impulses away from cell body and toward axon terminal • 5. Axon Terminals – branched structures at the ends of neurons. • 6. Myelin Sheath – insulating coat which covers the axon. This helps messages relay faster.
Motor Unit • Motor Unit – A neuron and all the muscles it gives power to.
The Central Nervous System • 1. The brain • a. Helps you think, remember, reason, feel emotion, and coordinate muscle movement • b. Divided into three main parts: cerebrum, cerebellum, brain stem
The Central Nervous System • 2. The Cerebrum • a. largest, most complex part of brain • b. right and left sides communicate with each other to coordinate movement. Right controls left side and vice versa. • c. left hemisphere is for more concretethinking • d. right hemisphere is for abstract thinking
The Central Nervous System • 3. Four lobes (parts) of the cerebrum • a. Frontal Lobe –use of language • b. Parietal Lobe – sensory information, including feelings of heat, cold, pain, touch • c. Occipital Lobe – Controls sense of sight • d. Temporal – sense of hearing and smell
Frontal Lobe Exercise: Unscramble the following words: • LLBA • DLOFER • EPONH • PHELNATE • ICINMDEE
Parietal Lobe Exercise:1. Blow on your hand2. Now, puff your breath on your hand
Whisper… • She sells seashells by the sea shore. • Eleven owls licked eleven little liquorice lollipops." • If two witches were watching two watches, which witch would watch which watch?“ • If you want to buy, buy, if you don't want to buy, bye bye!"
The Central Nervous System • 4. The Cerebellum • a. second largest part of brain • b. maintains body’s posture and balance • c. coordinates complex muscle movements like serving a volleyball or playing violin
The Central Nervous System • 5. The Brain Stem • a. 3 inch long stalk of nerve cells that connect the spinal cord to the rest of the brain
The Central Nervous System • b. five parts • 1. Medulla Oblongata – regulates heartbeat, breathing rate • 2. Pons– controls muscles of eyes and face. • 3. Midbrain – controls pupil size • 4. Thalamus – relays incoming information from the eyes, ears, and pressure receptors in skin • 5. Hypothalamus – regulates body temp, appetite, sleep
Activity 1 • Find pulse/HR • 25 Jumping Jacks! • Jog in place!
Brain Stem • 1. Medulla Oblongata – regulates heartbeat, breathing rate
Activity 2 • Watch the video!
Brain Stem • 2. Pons – controls muscles of eyes and face.
Activity 3 • Find a partner… • Look into their eyes!!! oooooooo
Activity 4 • What does a switch board do?
4. Thalamus – relays incoming information from the eyes, ears, and pressure receptors in skin
Activity 5 • Imagine you are stranded on a cold (20 degree) deserted island with no supplies, food, or shelter. You haven’t slept in two days, nor have you ate in two days. How would you be feeling???
