Integumentary system which statement explains the sarcomere appearance change during a muscle contraction
a. the light a bands remain at a constant length
b. the i bands lengthen
c. the i bands will only consist of thin filament
d. the h zone shortens as actin filaments slide towards the m-line

The correct answer is letter "A": The light A bands remain at a constant length.

Explanation:

In front of muscle contraction, the A-bands do not change their length, while the I-bands and the H-zone shorten. It provides a closer connection between the Z axes. The protein -tropomyosin- protects the actin molecules in the muscle cell's myosin binding sites.

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explanation: