The Entity Integrity Rule States That

question 75

Multiple Choice

The entity integrity rule states that:

• A) no primary key attribute can be null.
• B) referential integrity must be maintained across all entities.
• C) each entity must have a primary key.
• D) a primary key must have only one attribute.

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Definitions:

Arcuate Nucleus

A nucleus located in the hypothalamus that plays a crucial role in appetite regulation and other neuroendocrine functions.

Hypothalamus

This brain section, found below the thalamus, plays a key role in directing the operations of the autonomic nervous system and the pituitary gland's output, ensuring the regulation of crucial bodily processes including temperature, thirst, hunger, and the balance of bodily systems.

Serotonin

A neurotransmitter in the brain that affects mood, emotion, sleep, and appetite.

Hormone

Biological chemicals released by glands that regulate bodily functions and behavior by acting on specific target organs.