Challenge Question: What does the structure of the ear tell you about its function?

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1 Ear Activity Challenge Question: What does the structure of the ear tell you about its function? Initial Thoughts: Evidence: Go to Click Educational Games and then fine the Ear Page. In the middle of the page click the Explore the Ear pages link. Put on your headphones and begin watching the video and webpages to find the answers to the questions below. Introduction Where are your hearing receptors located in the ear? What are the hardest bones in your body? What shape are some ear bones? The Ear: Click the Ear link at the top of the page. Then click on the pink banner. Directions: In the space below draw the ear picture show with as much detail as you can. You will be labeling different parts of this picture so make it neat. Use the entire space below to draw your picture. Ear Activity pg 1 of 2

2 How We Hear: Click How We Hear, and beginner and the drum to begin. Look back to the previous page and label the ears three main parts on the picture that you drew on the first page. What is the function of the outer ear? What is the function of the middle ear? What is the function of the inner ear? Explore. Click Explore. Move the cursor over the different parts of the ear. Look back at the previous page and label the Pinna, Ear Canal, Ear Drum, 3 Ear Bones, Vestibular System and the Cochlea. How does the structure (shape and size) of the pinna lead you to its function? How does the structure (shape and size) of the ear canal lead you to its function? Simulation. Click Simulation. Can you hear the pink sound? Who Can t Hear. Click Who Can t Hear? Why is Carl having a hard time hearing? Why is Maria having a hard time hearing? (Is that common?) Quiz: click on Beginner. How big is your cochlea? When is earwax produced? When you hum what is vibrating? Why do you feel dizzy after you stop spinning? Summary: The answer to the challenge question is Ear Activity pg 2 of 2

3 Cow s Eye Dissection Activity Challenge Question: How do the structures in our eyes help us to see? Initial Thoughts: Evidence Go to: Click on the Watch online link. As you watch the dissection, answer the following questions: 1. We have 6 muscles attached to our eyeballs, unlike cows. What does this allow us to do that cows cannot do? 2. Why do we have fat and muscle surrounding our eyeball? 3. What happens to light when it hits the cornea? 4. What is the name of the fluid that oozes out when the cornea covering the eye is cut? 5. Which part of the eye gives eyes its color? 6. What causes the pupil to change size? Explain. 7. Why is the vitreous humor clear? 8. What is the job of your lens? 9. What happens to the images that you see if your retina gets folded or wrinkled? 10. Which part of your eye carries messages from your retina to your brain? Click on Learn more about eyes Click on the eye diagram to make it larger. Sketch the eye diagram in the box to the right. Make sure to label all of the structures. Eye Activity pg 1 of 2

4 Scroll over each of the structures with your mouse and summarize their function in the table below. Structure Function (If no function is listed, summarize what the structure is). Cornea Pupil Aqueous humor Iris Lens Vitreous humor Sclera Tapetum Optic nerve Blind spot Retina Click the back button to get back to the How does your eye work? page. Click on Light and Your Eye and read the description. Use the information and the picture to explain how each of the following are involved in helping you see images throughout the day. Light- Cornea- Pupil- Retina- Optic Nerve- Brain Lens- Why is the image that hits your retina upside down? Summary: The answer to the challenge question is Eye Activity pg 2 of 2

5 Nervous System Study Guide How the Nervous System Works (15.1) Stimulus, response, neuron, nerve impulse, dendrite, axon, nerve, sensory neuron, interneuron, motor neuron, synapse. What is the function of your nervous system? What is homeostasis? What are the 3 kinds of neuron and what are their jobs? What must the nerve impulse cross to be carried along? Divisions of the Nervous System (15.2) Central nervous system, peripheral nervous system, brain, spinal cord, cerebrum, cerebellum, brain stem, somatic nervous system, autonomic nervous system, reflex, concussion. What organs are included in the central nervous system? What are three main regions of the brain, and what do they do or control? What does the peripheral nervous system consist of? What is a reflex? and describe what happens during a reflex arc. What are two ways the central nervous system can be damaged? Sight and Hearing (15.3) Cornea, pupil, iris, lens, retina, rods, cones, optic nerve, eardrum, hammer, anvil, stirrup, cochlea, semicircular canal. Understand how the eyes work. Know that the ears convert sounds to nerve impulses that your brain then interprets. What controls your sense of balance? Smell, Taste and Touch (15.4) Know the Key terms and ideas Taste bud The senses of smell and taste work together explain how. Understand that the skin contains many touch receptors and that they respond to many stimuli (pressure, heat others) Alcohol and other Drugs (15.5) Know the Key terms and ideas Drug, drug abuse, tolerance, addiction, withdrawal, depressant, stimulant, alcoholism. Why are most abused drugs dangerous? What some commonly abused drugs? Alcohol use can destroy cells in the brain and liver, and can lead to addiction.

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