Cigarette smoking decreases speed in track runner, due to the fact that their lungs have black spots. Making it harder for them to breathe. And harder to breathe causing slowing in speed.
The hormone's signal is transduced through the cytoplasm of the target cell.
"Water-soluble hormones include glycoproteins, catecholamine's, and peptide hormones composed of polypeptides, e.g. thyroid-stimulating hormone, follicle-stimulating hormone, luteinizing hormone and insulin. These molecules are not lipid-soluble and therefore cannot diffuse through cell membranes.
Blood pressure is produced because you have pressure in your heart
