Question

1. Since carbon dioxide is about 20 times more soluble than oxygen in the blood plasma, the carbon dioxide is converted to carbonic acid.....

a. to lower the pH of the blood.

b.to raise the pH of the blood.

c.to maintain appropriate partial pressures, allowing more carbon dioxide to enter the blood from the tissues.

d.none of these choices are correct.

2. Gases diffuse....

a. from an area of low pressure to another area of low pressure.

b. from an area where they are not needed to an area where they are needed.

c. from an area of high pressure to another area of high pressure.

d.from an area of high pressure to an area of low pressure.

e. from an area of low pressure to an area of high pressure.

3.Which of the following best represents cellular respiration?

a.O2 & CO2 exchange between air & blood

b.C6H12O6 + 6O2 → 6CO2 + 6H2O + 36 ATP

c.air entering and leaving the lungs

d.O2 & CO2 exchange between blood & tissues

e. 6CO2 + 6H2O + Sunlight →C6H12O6 + 6O2

4. Which of the following is NOT commonly included as part of the processes involved in respiration?

a.Oxygen and carbon dioxide are exchanged between the blood and tissues.

b.Carbon monoxide combines with hemoglobin in the red blood cells.

c.Air enters and leaves the lungs.

d.ATP is produced within the body cells.

e.Oxygen and carbon dioxide are exchanged between the air and the blood.

It is multiple choice, please be specific

Answer 1

Sorry, but I cannot answer more than one question due to answering guidelines. But I answered two. You have to post the questions seperately.

Ans 1. (d) none of these choices are correct.

The carbon diioxide diffuses into RBC and combines with water to form carbonic acid, in presence of carbonic anhydrase. Being unstable the carbonic acid breaks into H⁺ and bicarbonate. Hemoglobin binds to the free H⁺ ions and the bicarbonate is transported out of RBC in exchange for chloride ion, this is called chloride shift. When the blood reaches the lungs, the bicarbonate ion is transported back into the RBC in exchange for the chloride ion. The H⁺ ion dissociates from the hemoglobin and binds to the bicarbonate ion. This produces the carbonic acid intermediate, which is converted back into carbon dioxide through the enzymatic action of carbonic anhydrase. The carbon dioxide produced is expelled through the lungs during exhalation.

The carbon dioxide is converted to carbonic acid for transportation mainly, but it also maintains blood pH by buffer system.

Ans 2. (d) from an area of high pressure to an area of low pressure.