Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETZoologyBreathing and Exchange of Gases

Read the following Assertion and Reason and choose the correct option. Assertion: Lung is situated in an air tight chamber called thorax Reason: Thoracic chamber is formed dorsally by the verteral column

Options

  1. ABoth Assertion and Reason are true and Reason is correct explanation of Assertion
  2. BBoth Assertion and Reason are true but Reason is not the correct explanation of Assertion
  3. CAssertion is true but the Reason is false
  4. DBoth Assertion are Reason are false

Correct answer

B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Step-by-step solution

The lungs are situated in the thoracic chamber which is anatomically an air-tight chamber.The anatomical setup of lungs in thorax is such that any change in the volume of the thoracic cavity will be reflected in the lung (pulmonary) cavity. Such an arrangement is essential for breathing,

Practice Breathing and Exchange of Gases on Quantrex Academy →

More from Breathing and Exchange of Gases

Match List I with List II : List I (Respiratory Volume) List II (Capacity in mL) A. ERV (Expiratory Reserve Volume) I. 2500 - 3000 mL B. RV (Residual Volume) II. 500 mL C. IRV (Ins 2026In humans, respiration occurs in the following steps. Arrange these steps in the correct order. A. Diffusion of O ₂ and CO ₂ between blood and tissues. B. Diffusion of O ₂ and CO ₂ 2026Sponges exchange O₂ with CO₂ by __________. 2026In water, frogs respire using __________. 2026Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs. Choose the correct answer from the following : 2025Match List-I with List-II. array |l|l|l|l| & List - I & & List - II A . & Emphysema & (i) & Rapid spasms in muscle due to low Ca ⁺⁺ in body fluid B. & Angina pectoris & (ii) & Dama 2025Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: During the transportation of gases, about 20-25 percent of CO ₂ i 2024Match List I with List II : Choose the correct answer from the options given below : 2024 Full Breathing and Exchange of Gases list All NEET PYQs