Answer:ryanodine receptor, or RYR) in the sarcoplasmic reticulum (SR), causes opening of the RYR. In cardiac muscle, opening of the L-type calcium channel permits influx of calcium into the cell
Explanation:
Answer:
d
Explanation:
the DNA is smaller than the chromosome by just a bit and 300 miles of DNA fit into a nucleus.
Melting of ice and island decreasing in level
Answer:sea levels dropped 300 ft
Explanation:gang