Question

Consider the following four statements (I - iv) and select the correct option stating which ones are true (T) and which ones are false (F).
(i) Formation of oxyhaemoglobin occurs on alveolar surface.
(ii) During gaseous exchange the gases diffuse from high particle pressure to low partial pressure.
(iii) Carbon dioxide cannot be transporteed width haemoglobin.
(iv) Earthworm respires through parapodia.

Answer 1

Answer:

Arterial blood gases (ABGs) is a collective term applied to three separate measurements—pH, Pco2, and Po2—generally made together to evaluate acid–base status, ventilation, and arterial oxygenation. Oxygen (O2) and carbon dioxide (CO2) are the most important respiratory gases, and their partial pressures in arterial blood reflect the overall adequacy of gas exchange. Pao2 is affected by age and altitude. Paco2 by altitude. Therefore, Pao2 must be individually calculated for each patient, and both determinations must be interpreted against local normal values. Hydrogen is not present in blood as a gas and, therefore, does not exert a partial pressure. However, pH, which measures hydrogen ion activity, is a conventional part of every arterial blood gas determination. The normal range for blood pH is 7.35 to 7.45.

Some calculated or derived variables may be reported with the ABGs. The bicarbonate concentration, which can be calculated from the pH and Pco2, is