Blood serum concentrations are much lowerâonly about 0.4% of the body's potassium is found in blood serum. As noted above, hypokalemia can be caused by the sudden uptake of potassium ions from the bloodstream by muscle or other organs or by an overall depletion of the body's potassium.
Early symptoms of the flu may include conditions such as excessive or sudden fatigue or body aches and chills, according to Healthline. While fatigue can be an early symptom of a cold, in people who have the flu, the fatigue is much worse.
Often the first and most obvious sign of pregnancy is a missed menstrual period. Symptoms can be detected as early as the first missed period--though some women report breast changes and fatigue before missing their period.ccording to the MayoClinic.com, signs and symptoms of the flu include fever, aches, chills, fatigue, nasal congestion, cough, loss of appetite and headache. Flu symptoms, like pregnancy signs, can be different from person to person and can vary in severity.