Alveolar Gas Exchange Concepts

Alveolar Gas Exchange Concepts

Assessment

Interactive Video

Biology, Science, Chemistry

11th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explores pathological conditions affecting ventilation/perfusion ratios, focusing on the alveolus in a normal lung. It explains the equilibrium of oxygen and carbon dioxide levels within the alveolus and how they differ from atmospheric air. The tutorial then examines the impact of blocked air supply to a lung lobe, leading to low oxygen and high carbon dioxide levels, resulting in an alveolar shunt. The body's adaptive response through hypoxic vasoconstriction is discussed, highlighting how it reduces perfusion to minimize wasted blood flow to non-functioning lung areas.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary composition of alveolar gas?

Only nitrogen

Only carbon dioxide

Oxygen, carbon dioxide, and nitrogen

Only oxygen

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do oxygen levels in the alveolus compare to fresh air and oxygenated blood?

Same as fresh air

Higher than both

Between the levels of fresh air and oxygenated blood

Lower than both

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the oxygen level in a lung lobe when the air supply is blocked?

It decreases to the level of venous blood

It remains the same

It increases

It becomes the same as atmospheric air

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to carbon dioxide levels in a blocked lung lobe?

They match atmospheric levels

They decrease

They increase

They remain the same

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the ventilation/perfusion ratio in an alveolar shunt?

Greater than 1

Less than 1

Equal to zero

Equal to 1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the body's response to low oxygen levels in the pulmonary circulation?

Vasoconstriction

Vasodilation

No change

Increased blood flow

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term for the body's response to low oxygen levels in the pulmonary circulation?

Ischemic vasoconstriction

Hyperoxic vasodilation

Hypoxic vasoconstriction

Metabolic vasodilation

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