Gas Transport in the Bloodstream and Control of Breathing

Flashcards covering key concepts about gas transport in blood and control of breathing.

What is the primary molecule responsible for oxygen transport in the blood?

Hemoglobin

What happens to hemoglobin saturation as the pH drops according to the Bohr effect?

Oxygen saturation declines.

What is the effect of increased temperature on hemoglobin saturation?

As temperature rises, oxygen saturation declines.

What does the oxygen-haemoglobin dissociation curve indicate at high PO2?

Lots of O2 is attached to hemoglobin.

How much carbon dioxide is transported dissolved in the plasma?

7%

What forms when carbon dioxide binds to hemoglobin?

Carbaminohaemoglobin (Hb.CO2).

What are the two types of chemoreceptors that monitor blood gases?

Central chemoreceptors and peripheral chemoreceptors.

What type of impulses does the pneumotaxic area provide?

Inhibitory impulses to inspiratory neurons.

What is the function of the medullary rhythmicity area?

It regulates the respiratory rhythm.

At what partial pressure of O2 does the hypoxic stimulus occur?

Below 50 mmHg.