Question

Air would move into the lungs if air pressure outside the body is higher than the air pressure inside the lungs (think of diffusion). Christopher Cucci 23 True Falso 1 points Save Answer Support QUESTION 23 Carbonic anhydrase (enzyme) helps carbon dioxide (CO2) bind to water and makes carbonic acid. This makes the blood more alkaline. True False 1 points Save Answer QUESTION 24 The heart's left side pumps venous blood. True False

Answer 1

22) same as the solute molecules transfer from high concentration to low concentration, air also travells from high concentration to low concentration. Thus when the pleural pressure (around lungs) decreases, air flows in and when pleural pressure is above atmospheric pressure then air flows out. Thus promotes breathing.

Hence, the statement is TRUE.

23) Carbonic anhydrase is an enzyme that converts CO2 into carbonic acid. The carbonic acid is a weak acid and release low amount of H+ ions into blood and results in slight decrease in pH (acidic). But in the question said pH becomes alkaline. So, the statement is FALSE.

24) Left side of heart receives venous blood. As the oxygenated blood from lungs enters into left side of heart through pulmonary vein and pumps to aorta. Where as right side of heart pumps blood to veins of lungs.

Hence, the statement is FALSE.