11th Biology Chapter 14: Breathing and Exchange of Gases MCQ Test

Challenge yourself with our Breathing and Exchange of Gases MCQ Test for 11th Biology Chapter 14. Evaluate your understanding of respiratory processes and prepare for exams effectively.

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Attempt Chapter wise 11th biology MCQ Test and Monthly Quiz contest of Biology 11th grade.

Time: 10 Minutes for 10 Question.

11th Biology: Breathing and Exchange of Gases

1 / 10

1. What is the primary function of the pleural fluid?

To humidify air

To reduce friction on the lung surface

To facilitate gas exchange

To transport gases

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2 / 10

2. What is the effect of increased CO2 on oxygen transport?

Enhances oxygen binding to hemoglobin

Reduces oxygen binding to hemoglobin

No effect on oxygen binding

Converts oxygen to carbon monoxide

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3 / 10

3. What happens to the respiratory process in a man going up a hill?

Respiratory rate decreases

Respiratory rate increases

No change in respiratory rate

Respiration stops

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4 / 10

4. What is the tidal volume in a healthy human?

1100 mL

500 mL

1200 mL

1000 mL

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5 / 10

5. What does the residual volume of the lungs indicate?

Total air capacity of the lungs

Air remaining after maximum expiration

Air inhaled during maximum inspiration

Air exchanged during normal breathing

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6 / 10

6. What is the condition called when there is difficulty in breathing causing wheezing?

Emphysema

Asthma

Pneumonia

Bronchitis

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7 / 10

7. What does the sigmoidal pattern of the oxygen dissociation curve represent?

Oxygen saturation in tissues

Carbon dioxide transport

Hemoglobin's affinity for oxygen

Blood pH levels

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8 / 10

8. What is the functional residual capacity of the lungs?

ERV + RV

TV + IRV

TV + ERV

RV + VC

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9 / 10

9. What percentage of carbon dioxide is transported as bicarbonate in the blood?

10%

50%

70%

90%

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10 / 10

10. How is oxygen primarily transported in the blood?

Dissolved in plasma

As bicarbonate ions

Bound to hemoglobin

As carbonic acid

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Summary Breathing and Exchange of Gases MCQ Test

How We Breathe:

We breathe in air (inhale) and breathe out used air (exhale) using our lungs and airways.
Special muscles (between our ribs and the diaphragm) help us breathe by changing the pressure in our chest.

What Happens When We Breathe:

Oxygen from the air moves into our blood in tiny air sacs in our lungs called alveoli.
At the same time, carbon dioxide from our blood moves into these air sacs to be breathed out.
Our blood carries oxygen to all parts of our body and picks up carbon dioxide to bring back to the lungs.

How Gases Move:

Oxygen and carbon dioxide move by diffusion, which means they naturally spread from areas of high concentration to low concentration.

How Blood Carries Gases:

Oxygen is mostly carried by a protein in our blood called hemoglobin.
Carbon dioxide is mostly carried as bicarbonate in our blood.

Breathing Control:

Our brain controls our breathing rate based on how much oxygen and carbon dioxide is in our blood.

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I’m a dedicated biology teacher specializing in online education and academic writing. Currently, I contribute to QuizRanker.org, where I create engaging and informative biology content. With an MSc degree in hand, I’m passionate about making complex biological concepts accessible and exciting for students everywhere.

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Summary Breathing and Exchange of Gases MCQ Test

Chapter wise biology 11th grade mcq

Pankaj Karn