Anusha

In lungs there is a definite exchange of ions between RBC and plasma. What is involved in the removal of CO2 from blood?

• Influx of Cl– ions into RBC

• Influx of HCO3– ions into RBC

• Efflux of Cl– ions into RBC

• Efflux of HCO3– ions into RBC

Which of the following statements are true/false?

(1) The blood transports CO2 comparatively easily because of its higher solubility.

(2) Approximately 8.9% of CO2 is transported by being dissolved in the plasma of blood.

(3) The carbon dioxide produced by the tissues, diffuses passively into the bloodstream and passes into red blood corpuscles and reacts with water to form H2CO3.

(4) The oxyhaemoglobin (HbO2) of the erythrocytes is basic.

(5) The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance.

• (1), (3) and (5) are true, (2) and (4) are false.

• (1), (3) and (5) are false, (2) and (4) are true.

• (1), (2) and (4) are true, (3) and (5) are false

• (1), (2) and (4) are false, (3) and (5) are true.

Mark the correct option from the following relationships between respiratory volume and capacities.

(i) Inspiratory Capacity (IC) = Tidal Volume + Residual Volume

(ii) Vital Capacity (VC) = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV) .

(iii) Residual Volume (RV) = Vital Capacity (VC) – Inspiratory Reserve Volume (IRV)

(iv) Tidal Volume (TV) = Inspiratory Capacity (IC) – Inspiratory Reserve Volume (IRV)

• (i) Incorrect,

  (ii) Incorrect,

  (iii) Incorrect,

  (iv) Correct

• (i) Incorrect,

  (ii) Correct,

  (iii) Incorrect,

  (iv) Correct

• (i) Correct,

  (ii) Correct,

  (iii) Incorrect.

  (iv) Correct

• (i) Correct,

  (ii) Incorrect,

  (iii) Correct,

  (iv) Incorrect

If the respiratory rate of ‘A’ is 35 breaths/min and tidal volume 185 cc/breath and the respiratory rate of ‘B’ is 25 breaths/min and tidal volume 259 cc/breath, then which of the following is true?

• Pulmonary ventilation of ‘A’ and ‘B’ is the same

• Alveolar ventilation of ‘A’ and ‘B’ is the same.

• Pulmonary ventilation of ‘A’ is greater than ‘B’.

• Alveolar ventilation of ‘A’ is greater than ‘B’.

What is the volume of air breathed in and out during normal breathing called?

• Vital capacity

• IRV

• EVR

• Tidal volume

What is a much-developed larynx of a human male called?

• Aristotle’s lantern

• Syrinx

• Adam’s apple

• Muller’s organ

What does 6000 to 8000 ml of air refer to?

• Vital capacity of lungs

• Volume of normal expiration per minute

• Sum of IRV + ERV

•   Inspiratory capacity of lungs

At the site of gas exchange in the alveoli of the lungs, the air is separated from blood by?

• alveolar epithelium only

• alveolar epithelium and capillary endothelium

• alveolar epithelium, capillary endothelium and tunica adventitia

• alveolar epithelium, capillary endothelium, a thin layer of tunica media and tunica adventitia

After a normal expiration, the volume of air that remains in the lungs is called?

• Residual volume

• Vital capacity

• Expiratory capacity

• Functional residual capacity

Which of the following is an example of a buffer system in the blood?

• Haemoglobin and oxyhaemoglobin

• Oxygen and carbon dioxide

• Albumin and globulin

• Sodium bicarbonate and carbonic acid