15. Oxygen and carbon dioxide are transported across membranes to and from cells

Question

15. Oxygen and carbon dioxide are transported across membranes to and from cells by a. Bulk transport b. Diffusion c. Vescicular transport d. Endocytosis e. Exocytosis 16. Peripheral tissue edema would result from a. Low blood albumin levels b. Congestive heart failure of the pulmonary circuit c. Blocked on inaccessible lymphatic vessels d. Any of the above 17. If congestive heart failure has progressed to the point of venous congestion in the systemie circuit, the kidneys will receive less blood flow; this would result in a. Increased aldosterone secretiorn b. Increased EPO secretion c. Decreased urine formation d. All of the above 18. How does blood pressure aid in the formation of urine? a It regulates reabsorption of potassium b. It inhibits secretion of nitrogenous wastes c. The hydrostatic pressure in afferent capillaries favors the formation of glomerular filtrate d. The pressure of the blood favors reabsorption by contributing to osmotic pressure 19. The primary site of reabsorption of solutes within the nephron of the kidney is the a. Glomerulus b. Proximal convoluted tubule c. Collecting ducts d. Any of the above 20. Which of the following is NOT a homeostatic function of the kidney a. Regulation of blood volume b. Regulation of sodium and potassium in the blood c. Regulation of cardiac output d. Regulation of blood pH 21-The balanced exchange between chloride and bicarbonate a. Occurs as bicarbonate formed within the rbc exits into the plamsa b. Is a major function of kidney tubules in maintaining blood pH c. Keeps the alveoli of the lungs in acid-base balance d. Is a significant blood buffer system 22. Emphysema usually results in what type of acid-base imbalance? a. Respiratory acidosis b. Respiratory alkalosis c. Metabolic acidosis d. Metabolic alkalosis PE

Explanation / Answer

15. Both oxygen and carbon dioxide transportecby means of simle diffusion, as they are non polar and small polar molecules , hence can pass through the membrane easily without the expenditure of energy.

Hence the correct option is (b)

16. Peripheral tissue edema is a type of edema in tissues perfused by peripheral vascular system.

The condition is commonly associated with ageing but the congestive heart failure, problem in lymphatic system, kidney disease, low albumin protein in the blood, liver diseases can also lead to peripheral tissue edema.

Hence the correct option is (d).

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