Which Chamber of the Heart Does the Blood First Enter

question 15

Multiple Choice

Which chamber of the heart does the blood first enter when it returns from the pulmonary circuit?

• A) the left ventricle
• B) the right ventricle
• C) the right atrium
• D) the left atrium

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Definitions:

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is absorbed by plants in photosynthesis.

Enzyme Specificity

The characteristic that allows an enzyme to choose only one substrate or a group of similar substrates, facilitating a specific chemical reaction.

Surface Tension

A physical property of liquids that causes the surface to behave as an elastic sheet, often observed as droplets forming shapes that minimize surface area.

Cohesion

The force that holds molecules of the same substance together (e.g., water molecules to each other).