Chapter 20

Question 1

aerobic respiration, generates carbon dioxide (CO2), which diffuses into the ECF.

Question 2

upper respiratory tract (nose, nasal cavity, pharynx and larynx) and lower respiratory tract (trachea, bronchi, and lungs)

Question 3

Ventilation

Answer 3

Breathing

Question 4

Respiration

Answer 4

Gas exchange

Question 5

small sacs surrounded by elastic tissue called stroma (STRŌ-ma; “bed”). The stroma’s elasticity allows the lungs to recoil after inflation.