Final Exam: BIO 242 EXAM 3 Questions with Verified Answers 2025-26 Latest

Final Exam: BIO 242 EXAM 3 Questions with
Verified Answers 2025-26 Latest Update



1. Which lines of defense would be considered nonspecific and innate?--
ANSWER--

--SOLUTION>>First line of

defense Second line of

defense

2. Differentiate between components of first and second line defense--
ANSWER-- -

--SOLUTION>>FIRST-- ANSWER--Physical and Chemical barriers

SECOND-- ANSWER-- phagocytosis, inflammation, fever, antimicrobial
proteins

3. FLOD-- ANSWER-- lysozome-- ANSWER-- --SOLUTION>> is secreted in
tears and saliva

4. What human body region is protected by fatty acids, acidic pH, lactic

acid, and tough cell barrier with its own normal biota?-- ANSWER-- --

SOLUTION>>skin

5. The sweat doud on skin and saliva in the mouth attributed to what line

of defense?-- ANSWER-- --SOLUTION>>First line

,6. Eosinophils-- ANSWER-- --SOLUTION>>attack parasitic helminths

7. Basophils-- ANSWER-- - make up less than .5% of circulating WBCs

- granules contain histamine

8. When monocytes migrate from the blood out to the tissues, they are

1 /

, trans- formed by inflammatory mediators to develop into -- ANSWER--
Macrophages

9. Inflammation- Cardinal Signs-- ANSWER-- - Rubor-- ANSWER-- redness

- Calor-- ANSWER-- warmth

-Tumor-- ANSWER--

swelling

Dolor--

ANSWER--

pain

10. The third line of defense against foreign invaders can be described

as having and -- ANSWER-- Specificity and Memory

11. A foreign molecule that causes a specific immune response is an -

-- ANSWER-- Antigen

12. cells are part of the humoral immunity and mature in the Bone

Marrow-

-- ANSWER-- B cells

13. cells are part of the cell mediated immunity and mature in the

thymyus-- ANSWER-- T cells

14. The most abundant class of antibodies in serum is-- ANSWER-- IgG

15. cells secrete antibodies-- ANSWER-- Plasma