Answer: it's because they need to provide a lot of energy.
Explanation: fat cells have many mitochondria because they store a lot of energy. Muscle cells have many mitochondria, which allows them to respond quickly to the need for doing work.
Answer: Up
Explanation: when an electron goes up it produces more energy which makes light. :)
Answer:
involve calcium voltage-gated channels
Explanation:
D. sum of all chemical reactions in an organism
Answer:
<em>Intervertebral Disc.</em> <em>The bodies of adjacent vertebrae are separated and united by an intervertebral disc, which provides padding and allows for movements between adjacent vertebrae.</em>
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<h3><em>Hope this helps!</em></h3>