Final answer:
The amount of ADH released when blood osmolarity is high is greater than the amount of ADH released when blood osmolarity is low.
Step-by-step explanation:
The amount of ADH released when blood osmolarity is high is greater than the amount of ADH released when blood osmolarity is low.
When blood osmolarity is high, such as during dehydration or after consuming a very salty meal, the osmoreceptors in the hypothalamus signal the release of ADH from the posterior pituitary gland. ADH acts on the kidneys to increase water reabsorption, reducing the concentration of solutes in the blood. This results in decreased urine volume.
On the other hand, when blood osmolarity is low, the hypothalamic osmoreceptors detect the change and decrease the secretion of ADH. Consequently, less water is reabsorbed from the urine filtrate, leading to increased urine volume.