Exchange of Gases

Exchange of Gases

Assessment

Interactive Video

Biology

9th - 10th Grade

Hard

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The video explains the process of diffusion, where molecules move from high to low concentration. It covers gaseous exchange at the alveoli and tissue levels, known as external and internal respiration. Factors affecting diffusion include partial pressure, membrane structure, solubility, and surface area. The video details how oxygen and carbon dioxide are exchanged in the lungs and tissues, emphasizing the role of partial pressure gradients.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the process called when oxygen enters the pulmonary capillaries from the alveoli?

Internal respiration

Cellular respiration

Pulmonary respiration

Photosynthesis

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which factor is crucial in determining the direction of gas exchange?

Humidity

Wind speed

Partial pressure

Temperature

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the diffusion membrane in the lungs primarily composed of?

Muscle tissue

Cartilage

Three layers including squamous epithelium

Bone

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does carbon dioxide diffuse more readily than oxygen across the diffusion membrane?

It is more soluble in water

It is more reactive

It is less dense

It is lighter

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Approximately how many alveoli are present in human lungs?

300 million

200 million

100 million

400 million

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the partial pressure of oxygen in alveolar air after inspiration?

120 mm Hg

40 mm Hg

95 mm Hg

105 mm Hg

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does carbon dioxide move from the pulmonary capillaries to the alveoli?

Through active transport

Via facilitated diffusion

By osmosis

Due to a partial pressure gradient