- published: 29 Apr 2016
- views: 19
A hormone (from Greek ὁρμή, "impetus") is a chemical released by a cell or a gland in one part of the body that sends out messages that affect cells in other parts of the organism. Only a small amount of hormone is required to alter cell metabolism. In essence, it is 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, whereas exocrine hormones (or ectohormones) are secreted directly into a duct, and, from the duct, they flow either into the bloodstream or from cell to cell by diffusion in a process known as paracrine signalling.
Living in a world of vanity and greed
Will this hide us, hide us from what's true?
When the night falls, fears and silent whispers
Then the dreams come, bringing shades of light
Sounds like... a roar of a lion
Calls everlasting, calls reminding us, of the time of
the fall of man
Fall of man
The fall of man
Our time is running out, we're out of control
And mankind doesn't know, know where to go
In our minds, someone's coming
In our hearts, like a strength growing
Sounds like... a roar of a lion
Calls everlasting, calls reminding us, of the time of
the fall of man
Fall of man
The fall of man
Our time is running out, we're out of control
And mankind doesn't know, know where to go
In our minds, someone's coming
In our hearts, like a strength growing
Sounds like... a roar of a lion
Calls everlasting, calls reminding us, of the time of
the fall of man
Fall of man
The fall of man
It's time to turn back, turn back to what once was
Renew the life again, let the spirit be led
Fight for what is true, reveal what is not
Let this non prove, he can change the greatest fall
Sounds like the roar of a lion