lab 15
The tolerated pH range in the body is 7.1 - 7.7. Select one: a. True b. False
False
Which of the following is not a direct function of electrolytes? Select one: a. Electrical Transmission b. Osmotic Control c. pH Regulation d. Temperature Adjustment
Temperature Adjustment
Most of the body's fluids exist as intracellular fluid. Select one: a. True b. False
True
Potassium is the most abundant cation in the extracellular fluid. Select one: a. True b. False
True
The idea that input must equal output is referred to as the: Select one: a. Transfer Concept b. Balance Concept c. Equilibrium Concept* d. Transition Concept
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What ion is required for the operation of the sodium pump and for neuromuscular activity? Select one: a. Calcium b. Chloride c. Magnesium d. Sodium*
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Which of the following is NOT an extracellular fluid? Select one: a. Plasma b. Lymph c. Glomerular Filtrate* d. Cytoplasm
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Which of the following is a method for expressing electrolyte concentration? Select one: a. Milliosmoles Per Liter b. Percent Solution c. Milliequivalents* d. All of the above.
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What comprises a typical buffer system? Select one: a. A strong acid and a weak acid. b. A strong base and a weak base. c. A weak acid and a salt of that acid. d. A strong acid and a strong base.
A weak acid and a salt of that acid.
Which of the following accounts for the majority of daily water intake? Select one: a. Beverages b. Moist food, such as fruits and vegetables. c. Any food. d. Cellular oxidative metabolism.
Beverages
Which electrolyte plays a prominent role in the blood acid/base buffer system? Select one: a. Calcium b. Chloride c. Bicarbonate d. Sodium
Bicarbonate
Which of the following is NOT true regarding electrolytes? Select one: a. An electrolyte is any substance that conducts electrical signals. b. Electrolytic balance is not required to maintain homeostasis. c. Electrolytes readily dissociate into ions. d. Electrolytes have four main functions in the body.
Electrolytic balance is not required to maintain homeostasis.
How can adjusting the rate of expiration influence blood pH? Select one: a. Increased expiration increases blood pH. b. Increased expiration decreases blood pH. c. Expiration always decreases blood pH. d. Expiration does not influence blood pH.
Increased expiration increases blood pH.
Thirst occurs when: Select one: a. The mucosa of the mouth loses water. b. Water intake exceeds water output. c. Increased osmotic pressure of the blood stimulates the hypothalamus. d. Shifts in sodium concentrations stimulate the cerebral cortex.
Increased osmotic pressure of the blood stimulates the hypothalamus
Which of the following is true regarding extracellular and intracellular fluid? Select one: a. Intracellular fluid surrounds cells. b. Extracellular fluid resides within cells. c. Intracellular fluid comprises the majority of fluid in the body. d. Intracellular fluid includes cerebrospinal fluid, lymph, and synovial fluid.
Intracellular fluid comprises the majority of fluid in the body.
How can the kidneys mediate blood pH? Select one: a. Kidneys can excrete hydrogen ions to decrease blood pH. b. Kidneys can excrete hydrogen ion to increase blood pH. c. Kidneys can excrete water molecules to increase blood pH. d. The kidneys cannot influence blood pH.
Kidneys can excrete hydrogen ion to increase blood pH.
Aldosterone regulates the secretion of which ion in the kidneys? Select one: a. Chloride b. Potassium c. Bicarbonate Ions d. Magnesium
Potassium
All of the following make up the three important acid-base buffer systems in body fluids except: Select one: a. Bicarbonate Buffer b. Sodium/Potassium Buffer c. Phosphate Buffer d. Protein Buffer
Sodium/Potassium Buffer
Acid-base imbalances can be addressed by changing the rate of respiration. Select one: a. True b. False
True
Calcium levels in blood plasma are regulated by: Select one: a. aldosteron b. antidiuretic hormone c. parathyroid hormone and calcitonin d. chloride ions
parathyroid hormone and calcitonin
