Which of These Statements Does NOT Correctly Describe Cross Bridges

question 201

Multiple Choice

Which of these statements does NOT correctly describe cross bridges?

• A)They are formed by the globular heads of the myosin molecules as they protrude from the thick filaments.
• B)They bind to actin during muscle contraction.
• C) They are not found in the I band.
• D) They bind with troponin and tropomyosin during muscle contraction to pull them away from the actin helical chain.

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Definitions:

Tensile Strength

The maximum amount of stress (force per unit area) a material can withstand while being stretched or pulled before failing or breaking.

Reinforcement Material

A substance added to something to make it stronger or more effective.

Section Modulus

A geometric property of a cross-section used in engineering to determine how a beam or structural element will deform under load.

Twistability

The ability of a material or structure to undergo twisting deformation without failing, relevant in engineering and materials science.