Natural emergency: something that occurs naturally
manmade: something caused by a person (ex.shooting)
Answer:
were r the statements i cant help u if i dont kno wat ur askin about
Explanation:
At the onset of a muscle contraction, the presence of calcium triggers the opening of the Na-K channels in the membrane. Potassium is a calcium inhibitor, so as the potassium flows out of the cell, it eventually reduces the presence of calcium. This causes the closure of the Na-K channel (negative feedback mechanism). In a hypokalemic state, the lack of sufficient K doesn't inhibit the calcium channel, and in turn doesn't properly terminate the muscle contraction at the cellular level.
The answer is true. The kidneys help filter and remove extra waste and extra water that turns into urine. The urine flows from the kidneys to the bladder through tubes called ureters. The bladder stores the urine until urination occurs.
