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BIO 26 Lab Exam
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Three main lines of defense
1. Surface barriers
2. Innate internal defenses
3. Adaptive defenses
Surface areas - think castle walls and moat
Castle walls - Epithelium
Moat - mucus secretion
Innate external defenses
Innate internal defenses - think guards
check I D and and are always ready to attack foe: cells and chemicals in body fluids
Adaptive defenses - think army
take time to mobilize and train to fight an identified enemy: B and T cells
Adaptive immunity differs from innate in four different ways - think guards and army
1. are specific - they are directed against a specific enemy
2. involve the
B
a
TT
alion - B and T cells
3. they have memory - will attack the same enemy who comes back to do battle again
4. are systemic - they can work anywhere in the castle/moat/walls - systemic
Author
LatinaTopaz
ID
146323
Card Set
BIO 26 Lab Exam
Description
Chapters 21/22/23
Updated
4/8/2012, 5:03:46 AM
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