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گیسوں کا تبادلہ

دسویں جماعت · حیاتیات · 6 سوالات

نام: ____________________   تاریخ: ____________

  1. Gaseous exchange in plants takes place through the:

    • A Xylem
    • B Stomata
    • C Phloem
    • D Roots only

  2. Gaseous exchange in humans takes place in the:

    • A Trachea
    • B Bronchi
    • C Alveoli
    • D Larynx

  3. The muscle that helps in breathing is the:

    • A Diaphragm
    • B Biceps
    • C Heart
    • D Stomach

  4. During inhalation, the diaphragm:

    • A Contracts and flattens
    • B Stays still
    • C Stops moving
    • D Relaxes and rises

  5. Oxygen is carried in the blood mainly by:

    • A Plasma
    • B Platelets
    • C White blood cells
    • D Haemoglobin

  6. Which disease inflames the lungs and fills the alveoli with fluid?

    • A Pneumonia
    • B Anaemia
    • C Typhoid
    • D Diabetes

جوابی کلید

1. B, 2. C, 3. A, 4. A, 5. D, 6. A

  1. Stomata let carbon dioxide and oxygen move in and out of leaves.

  2. Alveoli are thin walled air sacs surrounded by capillaries.

  3. The diaphragm and intercostal muscles change the volume of the chest.

  4. It contracts and flattens, enlarging the chest cavity.

  5. Haemoglobin in red cells binds oxygen.

  6. Pneumonia is an infection that affects the alveoli.