Hands On Lab 10: Vision and Hearing (3 Activities) Submission Instructions: · Type your answers and


Hands On Lab 10: Vision and Hearing (3 Activities)

Submission Instructions:

· Type your answers and copy all pictures directly into this Word document. Submit it via the Blackboard submission link in Word format (docx).

· Complete two virtual labs in Connect: Virtual Eye Dissection and Eye Accommodation.

Introduction: DON’T WORRY ABOUT DOING EYE DISSECTION SINCE I HAVE DONE IT. JUST ANWER THE QUESTIONS IN THIS ASSIGNMENT.

For this lab, in addition to the work below you will be completing 2 brief virtual labs in Connect, to assist with answering questions and to aid you in learning more about the special sense, vision.
Both virtual labs have unlimited attempts and are required. The dissection one is particularly fun. The rest of our lab will be watching brief videos, answering questions, and labeling important structures. When going through these activities, consider how our eyes and ears work together to keep us experiencing the world in a safe way.

Activity 1 (Virtual Vision Labs & Assessment)

Virtual Lab 1: Eye Dissection. You may access this directly through your Connect account or by using the link in Blackboard within this module.

In this lab you’ll be dissecting a cow eye. Focus here on the structures of the eye and their locations. Remember, form follows function. Our eye is a bit smaller than the cow eye and we do not have a tapetum lucidum, but otherwise they are almost identical.

Above, you’ll see a picture of the 1st page of your virtual eye dissection lab. Read the material on this page and
make sure to click on the small plus signs (where the arrow is on the diagram above) to familiarize yourself with each structure of the eye you’re about to dissect.

After completing the virtual lab and along with your textbook, answer the questions below:

1. List the structures and fluids through which light passes as it travels from the cornea to the retina.

2. A strong blow to the head may cause the retina to detach. Why do you think this may happen?

3. Thinking about our fovea centralis and its function, would you think we have rods or cones located there? Why not the other choice (what function do rods and cones have)?

Identify the various structures of the eye. Each letter will only be used once.

4. Sclera =

5. Ciliary body =

6. Optic nerve =

7. Suspensory ligaments =

8. Lens =

9. Choroid =

10. Pupil =

11. Vitreous chamber =

12. Anterior chamber =

13. Retina =

14. Cornea =

15. Iris =

16. Conjunctiva =

Virtual Lab 2: Eye Accommodation. You may access this directly through your Connect account or by using the link in Blackboard within this module. Just like in the previous virtual lab, read the full introduction page to learn more about this eye test and what is going on within the eye at different ages.

17. The lens of the eye is actually a bit elastic and its shape changes during accommodation. What muscle is aiding in this process?

18. The lens is focusing the image onto what part of the retina specifically?

19. You should have noticed some different results between Mr. Smith and Mr. Williams. What accounts for this difference?

Activity 2: Labeling the Ear

Identify the various structures of the ear. Each letter will only be used once. Diagram on next page.

20. Auditory Ossicles=

21. Cochlea=

22. Auricle=

23. Malleus=

24. External auditory canal=

25. Incus=

26. Semicircular canals=

27. Vestibulocochlear nerve=

28. Vestibule=

29. Round window=

30. Oval window=

31. Auditory (eustachian tube)=

32. Stapes=

33. Tympanic membrane=

Activity 3: Hearing and Balance

Watch the following 3 videos to better understand the role structures play in our ability to hear and maintain equilibrium.


Journey of Sound to the Brain (link opens in new window ~2min)

2-Minute Neuroscience video on our vestibular system (link opens in new window 2 min).

Crash Course video on hearing and balance (link opens in new window ~10min).

With a partner, try a simple equilibrium test:

Step 1. Have your partner stand erect on one foot for 30 second with their eyes open. Observe whether they are steady or not.

Step 2. Have your partner repeat this with their eyes closed (be ready to keep them from falling). Observe their steadiness again.

Step 3. Switch places with your partner and repeat the test.

Use your knowledge of the structures of the ear for hearing and balance along with the videos to answer the following questions.

34. In the experiment above, what sensory organs provided the info needed to maintain equilibrium for when the eyes were open?

35. What about when the eyes were closed?

36. What is the job of the auricle? In other words, why is our outer ear shaped the way that it is?

37. We have a cochlea and a vestibular apparatus in our ear. Which one is more associated with balance?

38. Thinking about our special senses, how do we get motion sickness (1-2 sentences, be specific in terms of what you have learned in this class)?

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