Answer:
Open channels allow an influx of sodium ions into the cytoplasm of the muscle fiber. The sodium influx also sends a message within the muscle fiber to trigger the release of stored calcium ions. The calcium ions diffuse into the muscle fiber.
Explanation:
ANSWER: Quaternary
just took the quiz on edge
<span>The liver is the largest of the human body<span>.
(</span></span><span>the skin. It weighs between 3 <span>and 4 kg)</span></span>
