You Are Taking a Lab Practical Exam, and One Station

question 27

Multiple Choice

You are taking a lab practical exam, and one station has pins in various internal structures of a bisected mammalian heart.You can orient yourself without picking up and examining the exterior of the heart because

• A)the width of the external wall of the right ventricle is thicker than all the other chamber walls.
• B)the width of the external wall of the left ventricle is thicker than all the other chamber walls.
• C)the width of the external wall of the left atrium is thicker than all the other chamber walls.
• D)the width of the external wall of the right atrium is thicker than all the other chamber walls.

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Definitions:

Electrical Impulse

An electrical charge that moves through neurons, enabling signals to be transmitted throughout the body, including to and from the brain.

Chain Reaction

A series of chemical reactions where the product or by-product of one reaction initiates another.

Contraction

The process of muscle fibers shortening in response to a stimulus, leading to movement or increased tension.

Cardiac

Relating to the heart, especially in terms of its function or diseases.