Osmotic Pressure and ADH Regulation in Body Fluids

These flashcards cover the concepts of osmotic pressure, its effects on body fluids, and the role of ADH in water reabsorption.

What happens when body fluids are too dilute?

Osmotic pressure is low, leading to decreased release of ADH and increased urine output.

What signal do osmoreceptors in the hypothalamus send when body fluids are hypertonic?

They send a signal to the posterior pituitary to increase the release of ADH.

What is the effect of increased ADH on the kidneys?

It increases reabsorption of water from the distal tubule and collecting duct.

What is osmolality?

The concentration of solutes in body fluids, affecting osmotic pressure.

What is the relationship between osmotic pressure and urine output?

When osmotic pressure increases, urine output decreases.

How does the body react to high osmolality?

The body increases ADH release to promote water reabsorption in the kidneys.

How does decreased ADH affect body fluids?

It leads to decreased reabsorption of water, resulting in increased urine output and lower osmotic pressure.

What does the term 'hypertonicity' refer to in body fluids?

It refers to body fluids being too concentrated, resulting in high osmotic pressure.