____ Specifies That for Every Attribute Value in One Relation

question 94

Multiple Choice

____ specifies that for every attribute value in one relation that has been specified in order to allow reference to another relation, the tuple being referenced must remain intact.

• A) Cardinality constraint
• B) Participation constraint
• C) Referential integrity
• D) Economic constraint

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Definitions:

Germinal Center

An area inside lymph nodes where mature B cells grow, evolve, and alter their antibody genes while responding to an immune challenge.

Afferent Vessels

Blood vessels that carry blood toward a particular organ or tissue, often referring to the vessels entering an organ.

Efferent Vessels

Blood vessels or lymphatic vessels that carry fluid away from an organ or tissue, as opposed to afferent vessels that bring fluid to it.

Lymphatic Vessels

A network of conduits through which lymph, containing immune cells and waste, is transported.