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Gaseous exchange
Class 10 · Biology · 10 questions
Name: ____________________ Date: ____________
Gaseous exchange in plants takes place through the:
- A Xylem
- B Stomata
- C Phloem
- D Roots only
Gaseous exchange in humans takes place in the:
- A Trachea
- B Bronchi
- C Alveoli
- D Larynx
The muscle that helps in breathing is the:
- A Diaphragm
- B Biceps
- C Heart
- D Stomach
During inhalation, the diaphragm:
- A Contracts and flattens
- B Stays still
- C Stops moving
- D Relaxes and rises
Oxygen is carried in the blood mainly by:
- A Plasma
- B Platelets
- C White blood cells
- D Haemoglobin
Which disease inflames the lungs and fills the alveoli with fluid?
- A Pneumonia
- B Anaemia
- C Typhoid
- D Diabetes
The windpipe is also called the:
- A Trachea
- B Larynx
- C Pharynx
- D Bronchus
Smoking mainly damages the:
- A Hair
- B Lungs
- C Nails
- D Skin only
The gas given out during exhalation in larger amount than in air breathed in is:
- A Argon
- B Carbon dioxide
- C Nitrogen
- D Oxygen
Stomata are opened and closed by:
- A Root hairs
- B Phloem
- C Guard cells
- D Xylem
Answer key
1. B, 2. C, 3. A, 4. A, 5. D, 6. A, 7. A, 8. B, 9. B, 10. C
Stomata let carbon dioxide and oxygen move in and out of leaves.
Alveoli are thin walled air sacs surrounded by capillaries.
The diaphragm and intercostal muscles change the volume of the chest.
It contracts and flattens, enlarging the chest cavity.
Haemoglobin in red cells binds oxygen.
Pneumonia is an infection that affects the alveoli.
The trachea carries air to the lungs.
Smoke harms the lungs and airways.
Exhaled air has more carbon dioxide.
Guard cells control the stomata.