BIOLOGY TOPIC 11 ANIMAL PHYSIOLOGY (HL): What are examples of the first line of defense? (4)

Question

What are examples of the first line of defense? (4)

Sammy Universe · Accepted Answer

skin and mucous membranes

lactic acid and fatty acids on the skin lowers pH (5,6)
mucus washes away pathogens
lysozymes in tears can cause cell lysis
cilia in the trachea can help remove pathogens

BIOLOGY TOPIC 11 ANIMAL PHYSIOLOGY (HL)

What are examples of the first line of defense? (4)

Skin and mucous membranes lactic acid and fatty acids on the skin lowers pH (5,6) mucus washes away pathogens lysozymes in tears can cause cell lysis cilia in the trachea can help remove pathogens

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