Age, gender, heredity, and race.
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.
Hey there!
There is a window period between being exposed to HIV and getting accurate results as to whether or not you have actually been infected. Many HIV tests can detect an infection two to three weeks after initial exposure. If someone tests negative on many HIV tests after two weeks since the possible exposure, they're likely HIV-negative, but should still get tested after a certain amount of additional time since everyone can react to the infection differently.
Your answer will be your second option.
Hope this helped you out! :-)
