​Cardiac Muscle Undergoes Fast, Synchronous Contractions Stimulated by Ion Flow

question 13

Multiple Choice

​Cardiac muscle undergoes fast, synchronous contractions stimulated by ion flow. Which type of cellular junction is essential for achieving this action in cardiac muscle?

• A) ​gap junctions
• B) ​tight junctions
• C) ​plasmodesmata
• D) ​adhering junctions
• E) ​desmosomes

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Definitions:

Vertebra

One of the small bones forming the backbone, providing support and protecting the spinal cord.

Transverse Processes

Projections on vertebrae where muscles and ligaments attach, part of the bone's anatomy.

Spinous Processes

Bony projections off the back of each vertebra that can be felt through the skin and serve for muscle and ligament attachment.

Winglike Side Projections

Structural or anatomical parts extending from the side of an object or body, resembling the wings of a bird or insect in shape or function.