Learning Modules Questions

Question 1

Why would biceps brachii not be a supinator if it attached to the ulna, instead of to the radius?

Answer 1

Supination requires the radius to move over the ulna. The ulna is fixed and does not rotate.

Question 2

WHERE DOES TIRCEPS SURAE ATTATCH AND WHY DOES THAT MEAN THEY CANT CAUSE SUPERNATION OR PRONATION

Answer 2

TRICEPS SURAE ATTATCH OT THE OLECRANON OF THE ULNA AND THE UNLNA IS FIXED
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Question 3

Thinking about the microscopic structure of muscle, why does a muscle create the greatest tension in the middle of the range of movement?

Answer 3

Optimal overlap between actin and myosin myofilaments.