Open Question
Explain how the amount of water in the body affects the concentration of ions and solutes in the ECF.
26. Fluid and Electrolyte Balance, Acid Base Balance
Fluid Balance
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All of the following would occur if there were an increase in plasma osmolality EXCEPT __________.
A
thirst
B
release of ADH
C
concentrated urine
D
production of large amounts of urine
Verified step by step guidance1
Understand the concept of plasma osmolality: Plasma osmolality refers to the concentration of solutes in the blood. An increase in plasma osmolality indicates a higher concentration of solutes, which typically triggers physiological responses to restore balance.
Identify the body's response to increased plasma osmolality: The body responds to increased plasma osmolality by stimulating thirst, prompting the individual to drink more water to dilute the solutes in the blood.
Consider the role of Antidiuretic Hormone (ADH): ADH is released in response to increased plasma osmolality. It acts on the kidneys to conserve water, reducing urine output and concentrating the urine.
Evaluate the effect on urine concentration: With the release of ADH, the kidneys reabsorb more water, leading to concentrated urine as the body attempts to retain water and reduce plasma osmolality.
Determine the exception: Given the physiological responses to increased plasma osmolality, the production of large amounts of urine would be the exception, as the body aims to conserve water rather than excrete it.
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