Respiratory System

Question 1

Respiratory System Function

Answer 1

Brings in oxygen, removes carbon dioxide.

Question 2

Main Parts

Answer 2

Lungs, trachea, bronchi, alveoli.

Question 3

Breathing (Ventilation)

Answer 3

Inspiration = Breathing in.

Expiration = Breathing out.

Tidal Volume = Air in & out per breath.

Respiratory Rate = Breaths per minute.

Ventilation = Tidal volume × Respiratory rate.

Question 4

Lung Capacity

Answer 4

Vital Capacity = Max air exhaled after deep breath.

Total Lung Capacity = Max air lungs can hold (~6L for males, ~4.2L for females).

Residual Volume = Air left after full exhale (prevents lung collapse).

Question 5

Gas Exchange (Pulmonary Diffusion)

Answer 5

Oxygen (O2) moves from lungs → blood.

Carbon dioxide (CO2) moves from blood → lungs.

Happens in alveoli (tiny air sacs).

Question 6

Acute Responses to Exercise

Answer 6

↑ Breathing rate = More oxygen intake.

↑ Tidal volume = Deeper breaths.

↑ Gas exchange = Faster oxygen & CO2 swap.