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Immune System: Innate and Adaptive Defenses

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Immune System: Innate and Adaptive Defenses

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Questions and Answers

What is the main difference between B-lymphocytes and T-lymphocytes?

B-lymphocytes are involved in humoral immunity while T-lymphocytes are involved in cellular immunity (correct)

B-lymphocytes are involved in cellular immunity while T-lymphocytes are involved in humoral immunity

B-lymphocytes are involved in adaptive immunity while T-lymphocytes are involved in innate immunity

B-lymphocytes are involved in innate immunity while T-lymphocytes are involved in adaptive immunity

What is the primary function of the external body membranes like skin and mucosae?

To produce antibodies against pathogens

To activate phagocytes and antimicrobial proteins

To respond to all foreign substances within minutes of invasion

To prevent physical entry of microorganisms (correct)

What is the characteristic of the secretions of the skin?

Alkaline pH that promotes bacterial growth

Neutral pH that has no effect on bacterial growth

Basic pH that inhibits bacterial growth

Acidic pH that inhibits bacterial growth (correct)

What is the characteristic of the innate immune system?

It is nonspecific and responds quickly to pathogens Signup and view all the answers

What is the function of the immune system?

To combat pathogens and respond to all foreign substances Signup and view all the answers

What are the mucous membranes involved in?

Lining all body cavities that open to the exterior Signup and view all the answers

What is the function of lysozyme found in saliva and lacrimal fluid?

Destroy bacteria Signup and view all the answers

What is the main function of sticky mucus in the respiratory tract?

Trap microorganisms Signup and view all the answers

What type of cells are macrophages derived from?

Monocytes Signup and view all the answers

What is the function of defensins produced by neutrophils?

Act as antibiotic-like chemicals Signup and view all the answers

What is the term for the process by which phagocytes engulf and digest foreign particles?

Phagocytosis Signup and view all the answers

What is the purpose of opsonization?

To coat foreign particles with proteins Signup and view all the answers