Exam 3: BIOS242 BIOS 242 Latest Update Fundamentals of Microbiology

Exam 3: BIOS242/ BIOS 242 (Latest 2025/

2026 Update) Fundamentals of Microbiology | Qs & As| Grade A| 100% Correct (Verified Answers)- Chamberlain what lines of defense are part of innate immunity - ANSWER - first

• second

what is the first line of defense - ANSWER surface protection composed of anatomical and physiological barriers what are 2 examples of the first line of defense - ANSWER - physical barriers

• chemical barriers

what are 2 examples of physical barriers - ANSWER - skin

• mucous membranes

what are 6 examples of chemical barriers - ANSWER - lysozyme

• sweat
• skins acidic pH
• hydrochloric acid
• bile and digestive juices
• resident microbiota 1 / 2

what are 4 examples of the second line of defense - ANSWER - phagocytosis

• inflammation
• fever
• antimicrobial proteins

what is the second line of defense - ANSWER a cellular and chemical system that comes immediately into play if infectious agents make it past the first line of defense what line of defense is part of acquired immunity - ANSWER third what is the third line of defense - ANSWER specific host defenses that must be made uniquely for each microbe through the action of special leukocytes what are 2 examples of the third line of defense - ANSWER - B cells

• T cells

what is the first line of defense in the mouth - ANSWER saliva which contains lysozyme where do B cells mature - ANSWER bone marrow where do T cells mature - ANSWER thymus

• / 2