Excitation-contraction coupling refers to the series of events that begins with the excitation of the sarcolemma in response to stimulation by a neurotransmitter, and results in the release of calcium ions from the sarcoplasmic reticulum.
Hence, option D is the 1st process that starts the excitation-contraction coupling.
The answer is the pigment red
Answer:
the example Is that if we see a plant it is made up of cells
Answer:
the answer is b.
Explanation:
prokaryotes don't have organelles, like eukaryotes do.
I think it is compound, that is a I think so I might be wrong
