BIOS242 Exam3 QUESTIONS AND
VERIFIED CORRECT ANSWERS
GRADED A+ [LATEST 2026-2027] 100%
GUARANTEED PASS
what is the second line of defense - CORRECT 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 - CORRECT ANSWER-third
what is the third line of defense - CORRECT 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 - CORRECT ANSWER-- B cells
- T cells
what is the first line of defense in the mouth - CORRECT ANSWER-saliva which contains
lysozyme
where do B cells mature - CORRECT ANSWER-bone marrow
, where do T cells mature - CORRECT ANSWER-thymus
what is an antigen - CORRECT ANSWER-a foreign molecule or chemical substance that causes
stimulates an immune reponse
what is the role of plasma cells (2) - CORRECT ANSWER-- produces antibodies (2,000/sec)
- attaches to antigens and tags them for destruction or neutralization
what are the 3 granulocytes - CORRECT ANSWER-- neutrophil
- eosinophil
- basophil
what are the 2 agranulocytes - CORRECT ANSWER-- lymphocytes
- monocytes
describe lymphocytes (4) - CORRECT ANSWER-- 20-35% of circulating WBC
- 2 types: B & T lymphocytes
- B cells form plasma cells
- T cells kill foreign cells
describe monocytes (5) - CORRECT ANSWER-- largest of all WBC
- 3-7% of circulating WBC
- cytoplasm has granules that contain digestive enzymes
- released from marrow into blood
- macrophages are monocytes that have left blood circulation
VERIFIED CORRECT ANSWERS
GRADED A+ [LATEST 2026-2027] 100%
GUARANTEED PASS
what is the second line of defense - CORRECT 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 - CORRECT ANSWER-third
what is the third line of defense - CORRECT 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 - CORRECT ANSWER-- B cells
- T cells
what is the first line of defense in the mouth - CORRECT ANSWER-saliva which contains
lysozyme
where do B cells mature - CORRECT ANSWER-bone marrow
, where do T cells mature - CORRECT ANSWER-thymus
what is an antigen - CORRECT ANSWER-a foreign molecule or chemical substance that causes
stimulates an immune reponse
what is the role of plasma cells (2) - CORRECT ANSWER-- produces antibodies (2,000/sec)
- attaches to antigens and tags them for destruction or neutralization
what are the 3 granulocytes - CORRECT ANSWER-- neutrophil
- eosinophil
- basophil
what are the 2 agranulocytes - CORRECT ANSWER-- lymphocytes
- monocytes
describe lymphocytes (4) - CORRECT ANSWER-- 20-35% of circulating WBC
- 2 types: B & T lymphocytes
- B cells form plasma cells
- T cells kill foreign cells
describe monocytes (5) - CORRECT ANSWER-- largest of all WBC
- 3-7% of circulating WBC
- cytoplasm has granules that contain digestive enzymes
- released from marrow into blood
- macrophages are monocytes that have left blood circulation
