Question

true or false question

the tension generated by a muscle fiber depends on how stretched or compressed the fiber is before it is stimulated.

true
false

Explanation:

Analyze the physiological statement

The statement states: "The tension generated by a muscle fiber depends on how stretched or compressed the fiber is before it is stimulated." This refers to the length-tension relationship in muscle physiology.

Evaluate the length-tension relationship

The force or tension a muscle fiber can generate is determined by the degree of overlap between the thick (myosin) and thin (actin) filaments within the sarcomeres before contraction begins.

• If the fiber is excessively stretched, there is minimal overlap, preventing cross-bridge formation.
• If the fiber is overly compressed, the thin filaments collide and interfere with each other, and the thick filaments run into the Z discs, restricting further shortening.
• An optimal resting length exists where the maximum number of cross-bridges can form, yielding peak tension.

Determine the truth value

Since the starting length (stretched or compressed state) directly dictates the potential tension generated upon stimulation, the statement is physiologically accurate.

Answer:

• True (Correct answer)
• False