Which condition would result from hyposecretion of aldosterone?

Hyposecretion of aldosterone leads to a decreased reabsorption of sodium in the kidneys. This hormone plays a critical role in regulating blood pressure and maintaining electrolyte balance by promoting sodium retention and potassium excretion. When aldosterone levels are low, the body loses more sodium and consequently retains less water, leading to decreased blood volume. As a direct result of this process, dehydration occurs because the body cannot retain enough fluid due to inadequate sodium levels.

In contrast, the other conditions presented do not stem directly from the lack of aldosterone. Airway dilation is related to respiratory processes, decreased heart rate is typically influenced by other factors like the autonomic nervous system or medications, and metabolic acidosis involves excessive acid accumulation in the body, which is not primarily linked to aldosterone secretion. Thus, dehydration is the most accurate outcome of aldosterone hyposecretion, as it highlights the hormone's crucial role in fluid balance and blood pressure regulation.