What Is the Role of a Foreign Key

question 238

Multiple Choice

What is the role of a foreign key?

• A)It is a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables
• B)It is a unique way to identify each record
• C)Is a field that uniquely identifies a give record in a table
• D)All of the above

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Definitions:

Expiratory Reserve Volume (ERV)

The additional amount of air that can be forcibly exhaled after a normal exhalation.

Functional Residual Capacity (FRC)

The volume of air remaining in the lungs after a normal, passive exhalation, critical for gas exchange between breaths.

Tidal Volume (TV)

The volume of air moved into or out of the lungs during a normal breath, at rest.

Residual Volume (RV)

The volume of air remaining in the lungs after a maximal exhalation, preventing lung collapse and ensuring continuous gas exchange.