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AP II Saladin
The Urinary System Quiz
Question | Answer |
---|---|
acidosis is likely to cause the following effects, except | hypercalcemia |
All of these hormones can affect sodium homeostasis by either increasing or decreasing its reabsorption at the kidney except | ADH |
The maintenance of homeostasis is least critical for which of the following electrolytes? | phosphates |
sodium | key in electrical potentials of cells, therefore it must be carefully regulated |
In a normal person who is sedentary during the day, more water would be lost per day through cutaneous transpiration than through sweat. | TRUE |
Human kidneys do not compensate well for a low fluid intake | TRUE |
Most of the water within our body is held in the extracellular areas such as the bloodstream | FALSE |
Fluid is continuously exchanged between compartments through capillary walls and plasma membranes. | TRUE |
Which of the following estimates of the average amount of water loss is incorrect? | breath—30 ml/day |
lost in the expired breath | 300 ml/day |
Cutaneous transpiration is also called sweat | FALSE |
Which of the following causes the long-term inhibition of thirst? | Blood rehydration |
least likely to stimulate the thirst center in the hypothalamus? | decreased blood osmolarity |
Renal failure may cause | excess fluid volume |
The most common form of fluid sequestration is | edema. |
A deficiency of potassium is called | hypokalemia. |
The primary effects of aldosterone on the kidney are that the urine contains less NaCl, more potassium, and has a lower pH. | True |
Which hormone mimics the effect of aldosterone and causes women to retain water during pregnancy and certain phases of the menstrual cycle? | Estrogen causes water retention |
Which of the following would not stimulate aldosterone release? | hypernatremia, since aldosterone increases sodium reabsorption |
Hyperkalemia causes nerve and muscle cells to be partially depolarized and can produce cardiac arrest | True |
Because cells require a high cytoplasmic concentration of phosphate ions, they must maintain a very low intracellular calcium concentration to prevent crystal formation. | TRUE |
Hypocalcemia causes decreased sodium permeability of the plasma membrane and muscle weakness. | FALSE |
Homeostasis maintains a normal blood and tissue fluid pH of 7.35 to 7.45. | TRUE |
The physiological buffer system is faster and more powerful than the chemical buffer system. | FALSE |
The bicarbonate buffer system neutralizes acid, but is not effective on strong bases. | FALSE |
Which buffer system accounts for three-quarters of all the chemical buffering of the body fluids? | Protein |
The kidneys can neutralize more acids or bases than either the respiratory system or the chemical buffers | TRUE |
Urine usually has a pH of | The pH of normal urine is 5 to 6. |
The use of 0.9% saline may cause all of the following problems except | the reduction of calcium load in the skeleton |
Hyperalimentation means a patient is being provided with complete I.V. nutritional support, including an amino acid mixture, vitamins, electrolytes, glucose, and, on alternate days, a fat emulsion | TRUE |
This hormone, produced by the hypothalamus, will stimulate the collecting ducts and the distal convoluted tubules to retain more water: | ADH |
Hypovolemia can be caused by all of the following except: | aldosterone hypersecretion |
Edema can result from all of these conditions except: | increased exercise |
Which condition would be most likely to stimulate aldosterone secretion? | hyponatremia |
This condition can cause hypokalemia | Addison disease |
Deficiency of this mineral is a cause of tetany: | calcium |
All of these mechanisms can directly help to maintain pH homeostasis except: | renin-angiotensin pathway |
This condition may be caused by hyperventilation: | respiratory alkalosis |
Hyperkalemia can be caused by: | too little aldosterone |
This hormone promotes phosphate excretion: | parathyroid hormone |