Breathing and Exchange of Gases

The partial pressure of oxygen in the alveoli of the lungs is

Select the correct statement.

Reduction in pH of blood will:

Asthma may be attributed to:

Name the chronic respiratory disorder caused mainly by cigarette smoking:

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

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

Which of the following is an occupational respiratory disorder?

Match the items given in Column I with those in Column II and select the correct option given below: Column I a. Tidal volume b. Inspiratory Reserve volume c. Expiratory Reserve volume d. Residual volume Column II i. 2500 - 3000 mL ii. 1100 - 1200 mL iii. 500 - 550 mL iv. 1000 - 1100 mL Choose the correct answer from the options given below:

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

The maximum volume of air a person can breathe in after a forced expiration is known as :

Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL, respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?

Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to

Identify the wrong statement with reference to transport of oxygen.

Select the correct events that occur during inspiration. (a) Contraction of diaphragm (b) Contraction of external inter-costal muscles (c) Pulmonary volume decreases (d) Intrapulmonary pressure increases Choose the correct answer from the options given below:

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

Given below are two statements: 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:

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:

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

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

Under normal physical conditions in human beings every 100 ml oxygenated blood can deliver____ml of O2 to the tissues.

Vital capacity of lung is _______.

Select the sequence of steps in Respiration. A. Diffusion of gases (O2 and CO2) across alveolar membrane. B. Diffusion of O2 and CO2 between blood and tissues. C. Transport of gases by the blood. D. Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out. E. Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2. Choose the correct answer from the options given below:

Match List I with List II: List I A. Expiratory capacity B. Functional residual capacity C. Vital capacity D. Inspiratory capacity List II I. Expiratory reserve volume + Tidal volume + Inspiratory reserve volume II. Tidal volume + Expiratory reserve volume III. Tidal volume + Inspiratory reserve volume IV. Expiratory reserve volume + Residual volume Choose the correct answer from the options given below:

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

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:

In water, frogs respire using _____________.

Match List-I with List-II. List-I (Respiratory Volume) A. ERV (Expiratory Reserve Volume) B. RV (Residual Volume) C. IRV (Inspiratory Reserve Volume) D. TV (Tidal Volume) List-II (Capacity in mL) I. 2500 - 3000 mL II. 500 mL III. 1000 - 1100 mL IV. 1100 - 1200 mL Choose the correct answer from the options given below:

Sponges exchange O$_2$ with CO$_2$ by __________.