1.Respiration serves as a means for the body to exchange gases with the atmosphe

Question

1.Respiration serves as a means for the body to exchange gases with the atmosphere via the A) stomach B) kidneys C) Blood

2. The purple structure in the picture is the A) heart B)Alveolus in the lung C) red blood cell

3. What kind of blood is carried through the pulmonary veins to the heart?
A) oxygen rich B) carbon dioxide rich C) neither

4. The PO2 in the blood is higher than the PO2 in the body tissues , so oxygen diffuses out from the red blood cells at the body tissues. A) true B) False

5.Gas exchange again replenishes the blood with oxygen and removes carbon dioxide in the A) nose B) trachea C) lungs

Explanation / Answer

Answer:

1. C) Blood

Explanation:

Blood carries oxygen from lungs to throughout the body tissues. In turn carbon dioxide is carried from body tissues to the lungs by blood.

2). Not answerable, picture is not available.

3). A) oxygen rich

Explanation:

Pulmonary veins carry oxygenated blood from lungs to heart.

4). A). True

Explanation:

According to diffusion, gases move from its high concentration to low concentration. Oxygen is diffused from red blood cells to tissues as red blood cells have high partial pressure (PO2) to low partial pressure in tissues

5). C). Lungs

Explanation:

Due to gaseous exchange, blood is replenished with oxygen and CO2 is diffused out of the lungs.

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