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Multiple Choice
Which of the following conditions would cause a decrease in antidiuretic hormone (ADH) release?
A
High plasma osmolality
B
Dehydration
C
Decreased blood pressure
D
Increased blood volume
Verified step by step guidance
1
Understand the role of antidiuretic hormone (ADH): ADH is responsible for regulating water balance in the body by controlling the amount of water reabsorbed by the kidneys. It is released in response to certain physiological conditions to maintain homeostasis.
Identify the conditions that stimulate ADH release: Typically, ADH release is stimulated by high plasma osmolality, dehydration, and decreased blood pressure. These conditions signal the body to conserve water to restore balance.
Analyze the condition of increased blood volume: Increased blood volume generally indicates that the body has sufficient or excess fluid. This condition would not require the conservation of water, thus reducing the need for ADH release.
Consider the physiological response to increased blood volume: When blood volume is high, the body aims to reduce fluid retention to prevent overload. This leads to a decrease in ADH release, allowing the kidneys to excrete more water and restore normal blood volume levels.
Conclude why increased blood volume decreases ADH release: Increased blood volume signals the body that there is no need to conserve water, resulting in decreased ADH release to promote diuresis and maintain fluid balance.