Podcast
Questions and Answers
What is the main role of the intercostal and diaphragm muscles in respiration?
What is the main role of the intercostal and diaphragm muscles in respiration?
- To transport oxygen and carbon dioxide in the blood
- To utilize oxygen during cellular respiration
- To create pressure gradients between the atmosphere and the alveoli (correct)
- To facilitate the exchange of oxygen and carbon dioxide at the alveoli
Which of the following factors is most important in determining the rate of diffusion of oxygen and carbon dioxide at the alveoli and tissues?
Which of the following factors is most important in determining the rate of diffusion of oxygen and carbon dioxide at the alveoli and tissues?
- The solubility of the gases
- The thickness of the diffusion surface
- The partial pressure gradients of the gases (correct)
- The volume of air involved in respiration
How is most of the carbon dioxide transported in the blood?
How is most of the carbon dioxide transported in the blood?
- As oxyhaemoglobin
- As carbamino-haemoglobin
- Dissolved in the plasma
- As bicarbonate (HCO3-) (correct)
What is the main form in which oxygen is transported in the blood?
What is the main form in which oxygen is transported in the blood?
What is the relationship between the partial pressure of oxygen (pO2) and the binding of oxygen to haemoglobin in the blood?
What is the relationship between the partial pressure of oxygen (pO2) and the binding of oxygen to haemoglobin in the blood?
Which of the following is not a factor that facilitates the diffusion of oxygen from the alveoli to the deoxygenated blood?
Which of the following is not a factor that facilitates the diffusion of oxygen from the alveoli to the deoxygenated blood?
What is the main role of the enzyme carbonic anhydrase in the transport of carbon dioxide in the blood?
What is the main role of the enzyme carbonic anhydrase in the transport of carbon dioxide in the blood?
How does the partial pressure of oxygen (pO2) and carbon dioxide (pCO2) affect the dissociation of oxygen from haemoglobin in the tissues?
How does the partial pressure of oxygen (pO2) and carbon dioxide (pCO2) affect the dissociation of oxygen from haemoglobin in the tissues?
What is the purpose of measuring the volumes of air involved in respiration using a spirometer?
What is the purpose of measuring the volumes of air involved in respiration using a spirometer?
Which of the following is not a step involved in the overall process of gas exchange in the body?
Which of the following is not a step involved in the overall process of gas exchange in the body?
