Anti-diuretic Hormone (ADH) Flashcards

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What is Antidiuretic Hormone (ADH) and where is it produced?

ADH is a hormone produced by the pituitary gland that helps maintain the body’s water balance by controlling water reabsorption in the kidneys.

What happens when the water content of the blood is too low?

The pituitary gland releases ADH, which makes the kidney’s nephron tubules more permeable to water, allowing more water to be reabsorbed back into the blood.

What happens when the water content of the blood is too high?

The pituitary gland stops releasing ADH, making the nephron tubules less permeable to water, leading to less water reabsorption and more urine production.

How does ADH respond to water loss from the body?

When the body loses water (e.g., through sweating), the blood becomes concentrated. The pituitary gland releases ADH, increasing the permeability of kidney tubules and allowing more water to be reabsorbed.

How does ADH affect the kidneys when the blood plasma concentration is high?

When blood plasma concentration is high due to too little water, ADH release increases, making nephron tubules more permeable so more water is reabsorbed.

What is the role of negative feedback in the control of water reabsorption by ADH?

The release of ADH and its effects on water reabsorption in the kidneys is an example of negative feedback, which helps maintain stable blood water levels by adjusting urine production.

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