NEET Zoology Breathing And Exchange Of Gases Class 11 Questions

Which of the following muscles help to increase the volume of thoracic cavity?

In humans, respiration occurs in the following steps. Arrange these steps in the correct order. A. Diffusion of O₂ and CO₂ between blood and tissues B. Diffusion of O₂ and CO₂ across alveolar membrane C. Pulmonary ventilation by which atmospheric air is drawn in and CO₂ rich alveolar air is released out D. Cellular respiration E. Transport of gases by the blood Choose the correct answer from the options given below

Match List-I with List-II:

Match List I with List II:

Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?

Match List I with List II :

Vital capacity of lung is ________.

Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver _____ ml of O₂ to the tissues.

Which of the following is not the function of conducting part of respiratory system?

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

The partial pressures (in mm Hg) of oxygen (O₂) and carbon dioxide (CO₂) at alveoli (the site of diffusion) are :

Assertion (A): A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations. Reason (R): Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen. In the light of the above statements, choose the correct answer from the options given below.

Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of

Asthma may be attributed to

Name the chronic respiratory disorder caused mainly by cigarette smoking.

When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?