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Questions and Answers
What is the primary function of buffers in the maintenance of normal cellular pH?
What is the primary function of buffers in the maintenance of normal cellular pH?
- To increase the concentration of H+ ions
- To bind excess H+ ions (correct)
- To regulate the concentration of bicarbonate
- To control the activity of enzymes
Which of the following is an example of a negative feedback mechanism?
Which of the following is an example of a negative feedback mechanism?
- Control of blood pressure (correct)
- Childbirth
- Control of blood glucose regulation
- Regulation of heart rate
What is the set point of normal cellular pH?
What is the set point of normal cellular pH?
- 7.6
- 7.4 (correct)
- 7.0
- 7.2
Which component of the homeostatic control mechanism determines the appropriate response to a stimulus?
Which component of the homeostatic control mechanism determines the appropriate response to a stimulus?
What is the result of a marked change in [H+]?
What is the result of a marked change in [H+]?
What is the primary goal of homeostasis in the body?
What is the primary goal of homeostasis in the body?
Which of the following is an example of a positive feedback mechanism?
Which of the following is an example of a positive feedback mechanism?
What is the term for the internal environment of the body?
What is the term for the internal environment of the body?
What percentage of the body is made up of water in an average young male?
What percentage of the body is made up of water in an average young male?
What is the main function of homeostasis in regulating the body's metabolic rate?
What is the main function of homeostasis in regulating the body's metabolic rate?
What is the term for the ability of cells to regulate their volume?
What is the term for the ability of cells to regulate their volume?
What is the term for the relatively constant temperature of the body?
What is the term for the relatively constant temperature of the body?
What is the normal plasma ion concentration range in terms of osmolarity?
What is the normal plasma ion concentration range in terms of osmolarity?
What happens to the osmolarity of the external environment during exercise?
What happens to the osmolarity of the external environment during exercise?
What is the effect of a decrease in glucose 6 dehydrogenase on NADPH production?
What is the effect of a decrease in glucose 6 dehydrogenase on NADPH production?
What type of solution is 0.45% saline compared to 0.9% saline?
What type of solution is 0.45% saline compared to 0.9% saline?
What is the primary mechanism of water movement across a membrane?
What is the primary mechanism of water movement across a membrane?
What is the name of the protein involved in water transport across a membrane?
What is the name of the protein involved in water transport across a membrane?
What percentage of body weight is composed of total body water?
What percentage of body weight is composed of total body water?
What is the osmolarity of the extracellular fluid (ECF) and intracellular fluid (ICF)?
What is the osmolarity of the extracellular fluid (ECF) and intracellular fluid (ICF)?
What happens to the movement of water when the ion concentration outside the cell increases?
What happens to the movement of water when the ion concentration outside the cell increases?
What is the approximate volume of plasma in the body?
What is the approximate volume of plasma in the body?
What is the primary function of the equilibrium between the extracellular and intracellular fluid spaces?
What is the primary function of the equilibrium between the extracellular and intracellular fluid spaces?
What is the approximate percentage of body weight composed of interstitial fluid?
What is the approximate percentage of body weight composed of interstitial fluid?
What drives the movement of H2O into the extracellular space?
What drives the movement of H2O into the extracellular space?
What is the net result of Na+/K+ ATPase activity?
What is the net result of Na+/K+ ATPase activity?
What is the response of cells to cell shrinking?
What is the response of cells to cell shrinking?
What is the consequence of rapid fluid replacement during dehydration?
What is the consequence of rapid fluid replacement during dehydration?
What is the term for the process by which cells respond to an increase in extracellular osmolarity?
What is the term for the process by which cells respond to an increase in extracellular osmolarity?
What is the primary function of Na+/K+ ATPase?
What is the primary function of Na+/K+ ATPase?
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