I think that after calcium and actin bind, actin starts changing shape.
Hope it helped,
BioTeacher101
Answer:
codons are groups of 3 bases in mRNA. Each codon codes for an amino acid.
Explanation:
You have to break them up in groups of 3 bases.
The chief difference between arteries<span> and </span>veins<span> is the job that they do. </span>Arteries<span> carry oxygenated blood away from the heart to the body, and </span>veins<span> carry oxygen-poor blood back from the body to the heart.
Another difference would be v</span><span>eins have valves and arteries do not. In arteries, blood flows in the right direction because of the heart pumping it forwards at high pressures. The lower blood pressure in veins means that valves are needed to stop blood flowing backwards (for example, in veins in the legs, blood needs to flow upwards against the pull of gravity).</span>
