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Breathing and Exchange of Gases

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Respiratory organs in animals

Subtopic

Respiratory organs in animals under Breathing and Exchange of Gases for Grade 11 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following helps in maintaining the moisture of the respiratory surface in terrestrial animals?

    A.

    Exposure to direct sunlight

    B.

    Mucus and internal location

    C.

    Dry scales

    D.

    Constant wind flow

  2. 2.

    Identify the incorrect match.

    A.

    Insect - Tracheal tubes

    B.

    Earthworm - Moist cuticle

    C.

    Fish - Lungs

    D.

    Mammal - Lungs

  3. 3.

    Which of these is a characteristic of pulmonary respiration?

    A.

    It occurs through moist skin

    B.

    It requires a system of tracheoles

    C.

    It involves vascularized bags called lungs

    D.

    It is found only in invertebrates

Download the worksheet for Breathing and Exchange of Gases - Respiratory organs in animals to practice offline. It includes additional chapter-level practice questions.

Mechanism of breathing and its regulation in humans

Subtopic

Mechanism of breathing and its regulation in humans under Breathing and Exchange of Gases for Grade 11 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Activation of the chemosensitive area results in signals being sent to the rhythm center to:

    A.

    Stop breathing

    B.

    Make necessary adjustments in the respiratory process

    C.

    Reduce heart rate

    D.

    Lower the temperature

  2. 2.

    Which of these is NOT a pulmonary volume?

    A.

    Tidal Volume

    B.

    Residual Volume

    C.

    Vital Capacity

    D.

    Blood Volume

  3. 3.

    What is the simple definition of breathing?

    A.

    Utilization of O2O_{2} by cells

    B.

    Exchange of O2O_{2} from atmosphere with CO2CO_{2} produced by cells

    C.

    Production of ATP in mitochondria

    D.

    Transport of gases by blood

Download the worksheet for Breathing and Exchange of Gases - Mechanism of breathing and its regulation in humans to practice offline. It includes additional chapter-level practice questions.

Exchange of gases, transport of gases and regulation of respiration

Subtopic

Exchange of gases, transport of gases and regulation of respiration under Breathing and Exchange of Gases for Grade 11 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The receptors in the aortic arch and carotid artery can send necessary signals for remedial actions to which center?

    A.

    Pneumotaxic center

    B.

    Respiratory rhythm center

    C.

    Vaso-motor center

    D.

    Cerebral cortex

  2. 2.

    Which of the following conditions shift the oxygen-hemoglobin dissociation curve to the left?

    A.

    High pCO2pCO_{2}

    B.

    High temperature

    C.

    Low pCO2pCO_{2} and low temperature

    D.

    High H+H^{+} concentration

  3. 3.

    Where does the reaction HCO3−+H+→H2CO3→CO2+H2OHCO_{3}^{-} + H^{+} \rightarrow H_{2}CO_{3} \rightarrow CO_{2} + H_{2}O primarily occur?

    A.

    In the tissue cells

    B.

    In the RBCs at the alveolar site

    C.

    In the plasma at the tissue site

    D.

    In the liver cells

Download the worksheet for Breathing and Exchange of Gases - Exchange of gases, transport of gases and regulation of respiration to practice offline. It includes additional chapter-level practice questions.

Respiratory volumes

Subtopic

Respiratory volumes under Breathing and Exchange of Gases for Grade 11 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following formulas correctly describes Vital Capacity?

    A.

    VC=IC+ERVVC = IC + ERV

    B.

    VC=EC+IRVVC = EC + IRV

    C.

    VC=TLC−RVVC = TLC - RV

    D.

    All of the above

  2. 2.

    A student measures TV=500TV = 500 mL and ERV=1000ERV = 1000 mL. The Expiratory Capacity is:

    A.

    1500 mL

    B.

    500 mL

    C.

    1000 mL

    D.

    2500 mL

  3. 3.

    The total volume of air a person can breathe in after a forced expiration is:

    A.

    Total Lung Capacity

    B.

    Inspiratory Capacity

    C.

    Vital Capacity

    D.

    Functional Residual Capacity

Download the worksheet for Breathing and Exchange of Gases - Respiratory volumes to practice offline. It includes additional chapter-level practice questions.

Disorders (Asthma, Emphysema, Occupational respiratory disorders)

Subtopic

Disorders (Asthma, Emphysema, Occupational respiratory disorders) under Breathing and Exchange of Gases for Grade 11 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Why are occupational respiratory disorders common in stone-grinding industries?

    A.

    Because workers do not drink enough water

    B.

    Because workers are exposed to massive amounts of dust

    C.

    Because the work environment is very cold

    D.

    Because of heavy manual labor

  2. 2.

    Emphysema is considered a 'chronic' disorder because:

    A.

    It lasts for a short duration

    B.

    It is caused by a virus

    C.

    It persists over a long period

    D.

    It can be cured in a few days

  3. 3.

    Which of the following symptoms is characteristic of asthma due to the narrowed bronchioles?

    A.

    Severe chest bleeding

    B.

    Wheezing

    C.

    Loss of appetite

    D.

    Fever

Download the worksheet for Breathing and Exchange of Gases - Disorders (Asthma, Emphysema, Occupational respiratory disorders) to practice offline. It includes additional chapter-level practice questions.

Breathing and Exchange of Gases - Class 11 Biology (CBSE) | Krit.club