Answer:
The sarcoplasmic reticulum contain calcium ions in skeletal muscles which is involved in muscle contraction.
Explanation:
Sarcoplasmic reticulum is an intracellular system of closed saclike membranes involved in the storage of calcium in skeletal muscle cells. The sarcoplasmic reticulum regulates the concentration of calcium and determine muscle contraction.
He can make use of an Air Quality Monitor through AirBeam. I no options to chose from so i take it that it isnt a multiple choice question. If im incorrect im sorry
The nucleus controls everything in a cell