08/06/21 00:39:51 bKby9Jaw0
>>603
>夏バテには十分ご注意ください。
夏バテにウナギを食べようと思うのですが、環境ホルモンが心配です。
では、ホルモンとは何？
Epinephrine (adrenaline), a catecholamine-type hormoneHormones (from Greek ？ρμ？ - "impetus") are chemicals released by cells that affect cells in other parts of the body. Only
a small amount of hormone is required to
alter cell metabolism.It is also a chemical messenger that transports
a signal from one cell to another. All multicellular organisms produce hormones;
plant hormones are also called phytohormones. Hormones in animals are often transported in the blood. Cells respond to a hormone
when they express a specific receptor for that hormone. The hormone binds to the receptor protein, resulting in the activation of a signal transduction mechanism that ultimately leads to cell type-specific responses.
Endocrine hormone molecules are secreted (released) directly into the bloodstream, while exocrine hormones (or ectohormones) are secreted directly into a duct,
and from the duct they either flow into the bloodstream or they flow from cell to cell by diffusion in a process known as paracrine signalling.
と定義されています。