Final answer:
A nurse would identify muscle weakness as a late manifestation of hypokalemia, a condition characterized by abnormally low blood potassium levels that can seriously affect the heart, muscles, and nerves.
Step-by-step explanation:
The condition that a nurse would identify as a late manifestation of hypokalemia is muscle weakness. Hypokalemia refers to an abnormally low potassium blood level. This condition can develop due to several reasons, including decreased intake often related to starvation, or from vomiting, diarrhea, or alkalosis. In severe cases, hypokalemia can lead to significant muscle weakness, irregular heart rhythms, and changes in blood pressure. It's important to address hypokalemia promptly, as it can have serious effects on the heart, muscles, and nerves, potentially leading to complications such as hypotension and palpitations.