Referential Integrity Should Be Enforced in a Database with Related

question 68

Multiple Choice

Referential integrity should be enforced in a database with related tables because it

• A) makes the database easier to back up.
• B) helps ensure invalid data is not entered into a table.
• C) makes the database easier to repair.
• D) helps ensure data is automatically updated.

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Definitions:

Myelin

A fatty covering that insulates nerve fibers in the brain, spinal cord, and peripheral nerves, speeding the transmission of nerve impulses.

Action Potential

A rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane, a process allowing neurons to transmit signals.

Membrane Potential

Voltage difference across a cell membrane.

Potassium

Potassium is a chemical element with the symbol K, necessary for the functioning of all living cells and vital for heart, muscle, and nerve functions.