Micro 1&2 - bacterial respiratory infections

Question 1

upper respiratory tract

Answer 1

Abundant and diverse microbiota

Question 2

lower respiratory tract

Answer 2

normally sterile

Question 3

mechanical (barrier - immunity in lungs)

Answer 3

particles of different sizes get removed at different levels

Question 4

chemical

Answer 4

• produces mucus, complement
• some epithelial cells can produce cytokines

Question 5

immune cells

Answer 5

alveolar macrophages ( can recruit other immune cells when needed)

Question 6

mucociliary elevator

Answer 6

90% of inhaled particles transported from bronchioles to trachea