NTA NTP 12: Immune System Exam Questions 100% Correct / Verified / detailed Answers

Immune System (Parts & Function): Integumentary System - ANSWER-Provides physical barriers and non-specific innate immunity: 1. Cutaneous membranes: cover and protect exterior surfaces of body 2. Mucous membranes: line and protect body cavities and organs 3. Serous membranes: surround and protect organs 4. Synovial membranes: line and protect joints 5. Adipose tissue: communicates metabolic state of body to immune system via hormones called adipokines, which in turn control immune cell activity Immune System (Parts & Function): Digestive System - ANSWER-Provides physical barriers, innate and adaptive immunity: 1. HCl and pepsin: neutralizes pathogens before entering intestine 2. GALT: houses 70-80% of immune system cells 3. Epithelial cells: secrete protective mucous as barrier against colonization and invasion by pathogens (1 layer thick in small intestine; 2 layers thick in large intestine), rich in antimicrobial proteins like lysozyme (enzyme that catalyzes destruction of cell walls of certain bacteria), facilitate nutrient digestion and assimilations, provide immunological surveillance signals at gut-mucosa-lumen interaface 4. Gut Flora in Large Intestine: stimulates immunity, feeds epithelial cells (produce SFAs for fuel), crowds out pathogenic bacteria Immune System (Parts & Function): Lymphatic System- Primary Organs & Tissues - ANSWER--Bone Marrow -Thymus Immune System (Parts & Function): Bone Marrow - ANSWER--Spongy tissue inside bones where all new blood cells and immune cells are created