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.
I think the most accepted Theory to make up living things is the cell theory.
Peptide hormones are usually produced in the body ahead of the time when they will be required. They are usually synthesized in the inactive form and store in the secretory vesicles just under the plasma membrane. Stimulation of the signalling causes immediate release of these hormones into the surrounding medium or the blood. Thus, cellular response to a peptide hormone is always rapid compared to that of the steroid hormone.
Marie curie, Gregory Mendel, Edward Jenner,Clara Barton
A.Cladograms, because those are diagrams, all the rest contribute to natural selection.
