6.4 IB Gas Exchange

Front

What is the primary function of alveoli in the respiratory system?

Back

The primary function of alveoli is to facilitate gas exchange, allowing oxygen to enter the blood and carbon dioxide to be expelled.

Front

What structural feature of alveoli enhances their gas exchange efficiency?

Back

A dense network of capillaries surrounds the alveoli, providing a large surface area for gas exchange.

Front

What gas do we inhale during respiration?

Back

Oxygen.

Front

What gas do we exhale during respiration?

Back

Carbon dioxide.

Front

What is the correct order of air flow during inhalation?

Back

The correct order is: bronchi (2), bronchioles (3), alveoli (1).

Front

What happens to chest volume when the diaphragm contracts?

Back

When the diaphragm contracts, chest volume increases, allowing air to flow into the lungs.

Front

What happens to chest volume when the diaphragm relaxes?

Back

When the diaphragm relaxes, chest volume decreases, pushing air out of the lungs.

Front

What are the tiny air sacs in the lungs called?

Back

Alveoli.

Front

What is the role of capillaries in the alveoli?

Back

Capillaries transport oxygen and carbon dioxide to and from the alveoli, facilitating gas exchange.

Front

How does the permeability of alveolar membranes affect gas exchange?

Back

The membranes of alveoli are more permeable to gases than to water, allowing efficient gas exchange.