The Number 0

question 44

Multiple Choice

The number 0.00325 × 10^-8 cm can be expressed in millimeters as

• A)3.25 × 10^-12 mm.
• B)3.25 × 10^-11 mm.
• C)3.25 × 10^-10 mm.
• D)3.25 × 10^-9 mm.

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Definitions:

Tropomyosin

A protein that wraps around actin filaments in skeletal and cardiac muscle cells, playing a key role in regulating muscle contraction.

Actin

A protein that forms (along with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cells.

Muscle Contraction

The process by which muscle fibers generate force and shorten or maintain tension in response to stimulation.

Abdominis

Referring to abdominal muscles, especially the rectus abdominis, which is a key muscle in the front of the abdomen.