Vernier Labs 15, 16, and 18 1 What advice would you give to a friend with tennis elbow about how she should lift a

frying pan onto the stove or a can of paint onto a work bench?

She should lift the pan with her palm facing up (underhand grip). This will use the flexor

muscles. Injured tendons (as in tennis elbow) are best healed with rest. 2 Using what you have learned in this experiment, explain why a wrist brace is effective

treatment for tennis elbow.

A wrist splint effectively immobilizes the muscles, allowing them to rest more. 3 Some people keyboard with their wrists resting on the table or on a wrist support. In

light of what you have learned from this experiment, would you recommend this practice

as a way of preventing injury to the extensor muscles of the forearm? Why or why not?

This can actually cause greater injury depending on the position of the wrist while

typing. If the wrist is cocked back, the extensor muscles must be constantly engaged to

keep the fingers elevated off the keyboard. Wrist rests are more effect to rest hands

when not typing. 4 Based on this experiment, what advice would you give to a beginning piano player

about proper hand position?

The best position is when the wrist is level with the hand as the fingers rest on the piano keys 5 Pitcher’s elbow is a repetitive use injury of the medial epicondyle. What do the

muscles that attach to the medial epicondyle control? How would you adapt this

experiment to test these muscles? 6 Is there a difference between the grip strengths in the different categories of height for

which data was collected in Table 4? What conclusion can you draw about the

relationship between height and grip strength? 7 List at least two possible reasons for the differences you see between the pinch

strength of the first two fingers and the second two fingers. In your answer consider

actions of the hand and musculature (Use an anatomy textbook or atlas to view the

muscles of the forearm and hand). 8. Describe a situation in which such a loss of grip strength is noticeable in your day-today life. 9. How might fatigue increase the risk of musculoskeletal injury?Comparative Anatomy – Extra Practice

Compare the anatomy of the butterfly and bird wing below.

 

1. What is the function of each of these structures?

2. How are they different in form? Give specific differences.

Compare the overall body structure of the cave fish and the minnow below.

 

 

1. What is the biggest, most obvious difference between the body structures of these two fish?

2. Assume the two fish came from the same original ancestor. Why might the cave fish have evolved without eyesight? 

3. What kind of sensory adaptation would you hypothesize the cave fish has to allow it to navigate in a cave, including catching and eating food? 

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