Physical barrier = .............. and physiological barrier = ...… - Vidyadip

MCQ

Physical barrier = .............. and physiological barrier = .............

✓
Skin, saliva in the mouth
B
Macrophage, acid in the stomach
C
Respiratory tract, $PMNL$
D
Urinogenital tract, $PMNL$

✓

Answer

Correct option: A.

Skin, saliva in the mouth

a

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