When a Skeletal Muscle Cell Contracts and the Muscle Shortens

question 89

Multiple Choice

When a skeletal muscle cell contracts and the muscle shortens,

• A) myosin heads generate a single power stroke.
• B) the position of an actin molecule relative to a myosin molecule does not change.
• C) some myosin heads are forming crossbridges as others are releasing them.
• D) the actin ATPase allows the actin molecule to swivel.
• E) the actin molecule swivels during the power stroke.

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Definitions:

Active Play

Physical activities that engage children in movement and play, crucial for their development and health.

Parallel Play

A stage of play in early childhood where children play adjacent to each other but do not directly interact or play together.

Play Face

An expressive facial gesture typically shown during play, indicating joy, engagement, and a non-threatening demeanor.