The Mechanism of Contraction in Smooth Muscle Is Different from Skeletal

question 119

Multiple Choice

The mechanism of contraction in smooth muscle is different from skeletal muscle in that ________.

• A) ATP energizes the sliding process
• B) the site of calcium regulation differs
• C) the trigger for contraction is a rise in intracellular calcium
• D) actin and myosin interact by the sliding filament mechanism

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Definitions:

Perpendicular Orientation

A position or alignment where two lines or planes meet at a right angle or 90 degrees to each other.

Thoracic Cavity

The part of the body's cavity housed within the chest, encompassing the lungs, heart, and part of the esophagus, among other organs.

Abdominopelvic Cavity

The bodily cavity that comprises the abdominal cavity and the pelvic cavity, housing organs such as the liver, stomach, intestines, and reproductive organs.

Midsagittal

Pertaining to a plane that divides the body into equal left and right halves.