What condition is indicated by low H+ levels and vomiting?

• A. Respiratory acidosis
• B. Metabolic alkalosis
• C. Respiratory alkalosis
• D. Metabolic acidosis

Answer: (B)

Low H+ levels in the context of vomiting typically indicate metabolic alkalosis. When a person vomits, they expel gastric contents, which include hydrochloric acid (HCl). This loss of acid can lead to a decrease in hydrogen ions (H+) in the body, resulting in an increase in pH and a state of alkalosis.

In metabolic alkalosis, the body is in a state where the bicarbonate concentration is high or there is a loss of hydrogen ions, often due to conditions such as vomiting or excessive intake of antacids. The body responds by attempting to compensate for this altered state through various mechanisms, such as respiratory adjustment.

To summarize, low levels of H+ due to the loss of gastric acid from vomiting contribute to metabolic alkalosis, making this the correct condition represented by the symptoms provided.