Why does hypokalemia cause muscle weakness?

Muscles need lytes. Your muscles and nerves require potassium to properly contract and relax. If low, they don't work as efficiently .
Muscle contraction. Without getting to technical, your muscles contract on a cellular level in order for the muscle to work. In order for this muscles to contract, k+ and ca+ are required to cross the cellular membranes. To much, or to little potassium will upset this balance. Hope this helps.

Related Questions

Why does hyperkalemia cause muscle weakness?

Dysfunction. It interferes with the muscles ability to contract because it alters the electrolyte balance across the muscle memberane. You have to have the right balance of potassium and other electrolytes for the contractile elements of the muscle to be able to contract which is what gives you movement and strength. Read more...

Does a elevated MCV cause muscle weakness.?

MCV and anemia. Mcv or mean corpuscular volume is a measure of red blood cell volume. We use MCV to differentiate types of anemia- low volume ( microcytic), normal ( normocytic), high volume (macrocytic) anemia. Factors like vitamin deficiency, thyroid/ liver problems, drugs, bone marrow insufficiency, hemolysis can cause macrocytic anemia. Anemia can cause fatigue & muscle weakness when it is significant. D/w md. Read more...
In short. The short answer is no. The elevated MCV needs to be looked at along other parameters of CBC and could reflect B12 deficiency or folate (folic acid) deficiency and mds. Read more...

What could worsening muscle weakness and pain in one arm be caused by?

Nerve impingement. can be caused by being sandwiched between two spinal bones, pressed by a bulging. It can cause muscle weakness and pain in one arm , finger numbness, etc. Prevention treatment is always recommended. See interventional pain management specialist for definitive diagnosis and management. Read more...

If you are living in a place that has mold, what kind of health problems can it cause? Is muscle weakness one of them?

Mold exposure. Mold is thriving in humid environment. If you develop sensitivities to those particular mold spores, the lining of your airway can get inflamed by exposing to the mold spores in the air you breath in. Depending how severe the inflammation is, you can get symptoms similar to rhino sinusitis, asthmatic flares if you have asthma, general malaise including muscle weakness. Read more...