Final answer:
An increase in the concentration of plasma, resulting from water loss, leads to a decrease in plasma osmolality. Plasma osmolality is the ratio of solutes to water in blood plasma. When more water is lost, the concentration of solutes in the plasma increases, causing the osmolality to decrease.
Step-by-step explanation:
An increase in the concentration of plasma, which results when more water than solutes are lost, leads to a decrease in the plasma osmolality. Plasma osmolality is the ratio of solutes to water in blood plasma. When more water is lost, the concentration of solutes in the plasma increases, causing the osmolality to decrease. This change in osmolality triggers the secretion of antidiuretic hormone, which leads to water reabsorption by the kidney and an increase in urine concentration and volume to restore the plasma osmolality to its normal levels.
An increase in the concentration of plasma, which results when more water than solutes are lost, leads to a increase in the plasma osmolality. Osmolality refers to the concentration of osmotically active particles (such as ions and molecules) in a solution. If water is lost without a proportional loss of solutes, the concentration of solutes in the plasma increases, causing an increase in osmolality. This can occur in situations like dehydration or excessive sweating, where there is a net loss of water from the body.