Tom is in respiratory arrest due to an electrical shock.Why does a good samaritan have up to 4 or 5 minutes to begin CPR and save Tom's life? A)There is reserve oxygen in Tom's lungs. B)There is a venous reserve of oxygen in Tom's blood. C)The ambient Po₂ can support life that long. D)The Haldane effect lasts up to 5 minutes. E)Tom's hypoxic drive will keep him alive for up to 5 minutes.

Question

Quizplus · Accepted Answer

When someone breathes air, oxygen is taken up in the lungs by red blood cells, which then travel through the body's circulation. Some of that oxygen is used by the body's cells, and what remains is carried back in the veins as a reserve. This is known as venous reserve of oxygen, which can keep Tom oxygenated for a few minutes, giving a good Samaritan time to begin CPR and potentially save Tom's life.

Tom Is in Respiratory Arrest Due to an Electrical Shock