Block 4 MPP 3202 2023

What is correct regarding gases?

-CO2 composes <1% of the atmospheric air -The partial pressure of oxygen in the air is 160 mmHg at sea level. -O2 composes 21% of the atmospheric air. -Gases (O2 and CO2) move passively down their pressure gradients from higher to lower.

What is correct regarding external respiration?

-The partial pressure of oxygen is higher in the air we breath than in the alveol -Since the cells consume oxygen, the partial pressure of oxygen in the blood as it travels through the tissue capillaries rapidly decreases from the PO2 in the arteriole blood -The partial pressure of oxygen decreases in the respiratory airways compared to the air because we can not exhale every bit of air from the lungs -The partial pressure of oxygen in the arterial blood is normally the same as in the alveoli because of rapid diffusion

When hemoglobin is fully bound with oxygen it is said to be saturated. How many sites on Hemoglobin are filled with oxygen when it is saturated?

4

What partial pressures of gases match with levels of specific body regions? A.) PCO2 of 46 mmHg B.) PCO2 of 40 mmHg C.) PO2 of 40 mmHg D.) PO2 of 100 mmHg E.) PO2 of 30 mmHg

A.) venous blood CO2 levels B.) arterial blood CO2 levels C.) venous blood O2 levels D.) arterial blood O2 levels E.) level of O2 in the interstitial fluid around contracting muscle cells

Select all patients who would be helped from breathing supplemental oxygen, (100% oxygen).

Ex, and zee

The name of the protein that binds oxygen with high affinity is...

Hemoglobin

In comparison to the partial pressure of oxygen (PO2) in atmospheric air...

The PO2 in the alveoli is lower because water vapor is added in the lungs and some air stays in the lungs at the end of expiration

During inspiration...

The diaphragm contracts and moves downward to decrease the pulmonary pressure

True or false? Since Hemoglobin is found in red blood cells, the number of red blood cells will affect the oxygen carrying capacity of a patient's blood

True

True or false? The PO2 value refers only to the amount of oxygen dissolved in the plasma and the oxygen bound to hemoglobin does not contribute to the PO2 value.

True

According to the picture which patients would be helped from a blood transfusion? The blue indicates red blood cells (Hct) and the red dots indicate oxygen saturation of hemoglobin.

Why and zee