Cardiovascular & Immune System Support Flashcards

Approximately what portion of the body's immune tissue is located in the gut-associated lymphoid tissue (GALT)?

Answer: About 70%

Roughly 70% of immune tissue resides in the gut, making digestive health central to immunity.

Which statement best describes vitamin D's role in immune function?

Answer: It modulates innate and adaptive immune responses and supports antimicrobial peptide production

Immune cells express vitamin D receptors, and vitamin D promotes antimicrobial peptides like cathelicidin.

Zinc deficiency most directly impairs which aspect of immunity?

Answer: T-cell development and function

Zinc is essential for thymic function and T-lymphocyte maturation and activity.

What is the main function of secretory IgA?

Answer: Providing a first line of defense on mucosal surfaces

Secretory IgA neutralizes pathogens and antigens at the gut, respiratory, and urogenital mucosa.

Which nutrient supports phagocyte function and acts as a water-soluble antioxidant within immune cells?

Answer: Vitamin C

Vitamin C accumulates in neutrophils and supports their function while protecting them from oxidative damage.

What is the role of regulatory T cells (Tregs)?

Answer: Suppress excessive immune responses and maintain tolerance

Tregs dampen immune activity to prevent autoimmunity and excessive inflammation.

How does vitamin A support immune defense?

Answer: By maintaining the integrity of mucosal epithelial barriers

Vitamin A maintains epithelial tissues and supports IgA responses at mucosal barriers.