Question

20) The amount of Potassium secreted by the kidneys is regulated by: a) ADH b) Aldosterone c) Cortisol d) Parathormone e) Calcitonin 21) Where in the body Co, reacts with water to form H2 CO a) Kidneys b) Lungs c) Plasma & RBC's d) Plasma & WBC's e) Serum 22) Respiratory response to Alkalosis is: a) Hyperventilation b) Hypoventilation c) Hypercapnia d) Decreased metabolism e) Increased metabolism 23) The most effective long-term protecion agains pH changes of body luid is: a) Buffer system of plasma b) Renal control of Hnco,- c) Presence of dissolved proteins in the plasma d) Presence of electrolyies in the plasma e)None of the above 24) Kathy came to the emergency room with nausea & dizziness. A siat blood test reveals elevated level of bicarbonate in her blood. This suggests she is probably suffering from: a) Acidosis b)Meiabolic-Alkalosis c) Hypoventilation d) Hyperventilalion e) Fregnancy

Answer 1

20. The amount of potassium secreted by the kidney is regulated by aldosterone. Secretion of aldosteron depends upon the amount of potassium present in body. When amount of potassium is low, aldosteron is secreted and potassium is reabsorbed in collecting duct and distal tubule.

21. In plasma and RBC body CO2 reacts with water to form H2CO3. CO2 is carried by red blood cells and with the help of carbonic anhydrase it is converted to carbonic acid.

22. Respiratory response to Alkalosis is hypoventilation. This helps body to increase CO2 concentration, thereby reduce too much alkalinity of blood.

23.The most effective long term protection against pH changes of body fliud is renal control of H+/HCO3_. It controls a crucial mechanism to maintain the blood pH between 7.35 to 7.45.