Ventilation

Question 1

Answer 1

PVR(6000ml/min)= Tidal volume (0.5L) x Breathing rate

5L= 500 ml

BR= PVR/ tidal volume= 6000/500= 12 breatrhs per min

Question 2

Answer 2

The pull of the diaphragm and the antagonists interraction between the exterrnal and internal intercostal muscles in bringing about a reduction in pressure in the thoracic cavity.

This results in air moving in and the lung volunme increasing.

Question 3

Answer 3

Oxygen therapy decreases the breathing rate.

This means tyeh diffusion of carbon dioixde out of teh blood reduces.

Resulting in increased carbon dioxide concentration in the blood.

Question 4

Answer 4

-Increased carbon dioxide reacts with water in the blood to turn into HCO- and H+.

This is acidic so the pH will decrease.