lab manual_senses ear_atlas
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PRE-LAB EXERCISES What is sound? Sound is composed of waves of pressure. Through a series of events, these waves of pressure are amplified and changed into a signal, which moves ciliary hairs on rec e... ptors in the inner ear, changing the signal into a neural signal. A. Overview of Hearing Go to the Views menu, select Microanatomy, and choose 7. Ear. Auricle, helix Auricle, antihelix Auricle, concha Auricle, lobule Auricle, crura of antihelix Auricle, antitragus External acoustic meatus Tympanic membrane (ear drum)3 1. Examine the outer ear. Note how it looks like a funnel. What do funnels do when you pour liquid into them? 2. How do you think the outer ear’s funnel-like shape would influence sound movement through the ear? 3. The tympanum of the ear is colloquially called the “ear drum.” What happens when you hit a drum? 4. What do you think hits the tympanum? 5. The force of something pushing on something else is related to the change in pressure divided by the resistance. This means that what it is pushing on is important. Which has more resistance (is harder to push against), air or water? 6. What would be needed to overcome increased resistance? 7. The inner ear is fluid-filled, while the external ear conducts sound through the air. What must happen to the signal as it transitions from air to fluid? 8. Briefly, what triggers a neural signal [Show More]
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