Final answer:
Extreme dehydration can result in a subsequent high concentration of sodium in the blood.
Step-by-step explanation:
Extreme dehydration can result in a subsequent high concentration of sodium in the blood. Dehydration refers to water loss from the body without adequate replacement, and it can lead to an imbalance of electrolytes, including sodium. When the body loses water, there is less liquid to dilute the sodium in the blood, causing its concentration to increase.