In This Diagram of the Heart, Which of the Following

question 81

Multiple Choice

In this diagram of the heart, which of the following choices correctly identifies A and B?

• A) A is the AV node; B is the cardiac pacemaker.
• B) A is the SA node; B is the septum.
• C) A is the AV node; B is the SA node.
• D) A is the SA node; B is the AV node.
• E) A is the septum; B is the cardiac pacemaker.

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Definitions:

Inner Mitochondrial Compartment

The matrix within mitochondria where critical reactions in cellular respiration, including the Krebs cycle, take place.

ATP Production

The biochemical process cells use to convert food into energy in the form of adenosine triphosphate (ATP).

Energy Storage Molecules

Compounds that cells use to store and release energy, such as ATP, fats, and carbohydrates.

Lipids

Lipids are a group of naturally occurring molecules that include fats, oils, waxes, and certain vitamins, characterized by their insolubility in water and role in storing energy and forming cell membranes.