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Questions and Answers
Which hormone stimulates the kidneys to retain water and sodium, and excrete potassium?
Which hormone stimulates the kidneys to retain water and sodium, and excrete potassium?
- ADH
- Insulin
- Aldosterone (correct)
- Glucagon
What is the function of ADH?
What is the function of ADH?
- Elevates blood glucose levels
- Stimulates the kidneys to retain water and sodium, and excrete potassium
- Lowers blood glucose levels
- Promotes reabsorption of water in the collecting duct (correct)
What does osmolality measure?
What does osmolality measure?
- The number of particles per kilogram of solvent (correct)
- The pressure exerted to prevent the movement of free solvent molecules across a semi-permeable membrane into a region of high solute concentration
- The force exerted by a fluid against a wall causes movement of fluid between compartments
- The diffusion of water across a selectively permeable membrane
What is the definition of osmosis?
What is the definition of osmosis?
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What does colloid osmotic pressure prevent?
What does colloid osmotic pressure prevent?
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Study Notes
Hormone Regulation
- Aldosterone stimulates the kidneys to retain water and sodium, and excrete potassium.
- ADH (Antidiuretic Hormone) regulates water reabsorption in the kidneys.
Osmolality and Osmosis
- Osmolality measures the concentration of solutes in a solution.
- Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration through a semipermeable membrane.
Colloid Osmotic Pressure
- Colloid osmotic pressure prevents the loss of water from blood vessels into tissues.
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