Answer:
Red blood cells are formed in the red bone marrow of bones
<span>Norepinephrine uses the Second
Messenger System, which means, cells signal to each other what molecules have
been released that will trigger a physiological reaction. </span>
<span>
This phenomenon is activated after the ligand (ion or molecule) is bonded to its receptor
(protein molecule), creating a variation that causes a chain-reaction, that will
finally activate the Second Messenger. The latter will activate intercellular
molecules that will be able to control the cell’s activity. </span>
Answer:
The mixing of fats with water, assisted by molecules that have both nonpolar and polar ends, is called <u>emulsification</u>
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Marine mammals breed by having coitus
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