…Melanocyte-stimulating hormone (MSH). Three types of MSH, α, β, and γ, have been isolated from the pituitary gland of animals. From the Pituitary Gland…Fish and amphibians have a well-developed intermediate region. In these animals, this region secretes the melanocyte-stimulating hormone (MSH). In these animals, the secretion of this hormone is stimulated in the dark, and this hormone acts on the melanocytes in the skin, causing the melanin granules to spread into the cell processes, resulting in a darker body color. … From [Melanin]…Melanin exists in various ways within cells, but melanophores are involved in body color change, darkening or lightening the body color by regulating the aggregation and diffusion of melanosomes. This process is known to be controlled by hormones such as melanocyte-stimulating hormone and melatonin, and by chromatophore nerves. Melanin is thought to serve as a defense mechanism against excess light, but its role in the brain, adrenal medulla, etc. is unknown. … *Some of the terminology that refers to "melanocyte-stimulating hormone" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…メラニン細胞刺激ホルモンmelanocyte‐stimulating hormoneの略。動物の脳下垂体から,α,βおよびγの3種類のMSHが分離されている。… 【脳下垂体】より…中間部が発達しているのは魚類や両生類である。これらの動物では,ここからメラニン細胞刺激ホルモンmelanocyte‐stimulating hormone(黒色素胞刺激ホルモン,MSH)が分泌される。これらの動物は暗い所ではこのホルモンの分泌が促され,このホルモンが皮膚のメラニン細胞に働き,のメラニン顆粒を細胞の突起内に拡散させるので,体色が黒くなる。… 【メラニン】より…メラニンの細胞内における存在様式はさまざまであるが,黒色素胞は,体色変化に関与し,メラノソームの凝集,拡散を調節することにより体色の暗化,明化が行われる。この過程は,黒色素胞刺激ホルモンmelanocyte‐stimulating hormone,メラトニンmelatoninなどのホルモンと色素胞神経によって支配されていることが知られている。メラニンは生体に過剰の光線に対する防御機構として役立っていると考えられるが,脳,副腎髄質などにおける役割は不明である。… ※「melanocyte-stimulating hormone」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
>>: Melanosis faciei feminina (English spelling)
Revenues generated from a company's main busin...
...Some light sources are controlled by mechanica...
〘Noun〙 An iron bowl carried by a monk who goes beg...
…He was sent as chief of staff during the Polish ...
Year of birth: Year of birth and death unknown. Il...
In photography, the range in which the brightness ...
…[Shizuo Tsuji]. … *Some of the terminology that ...
Also called pilonidal fistula. A chronic, purulent...
An evergreen shrub of the Rubiaceae family. It is ...
...In America, the larvae are called dobsons or h...
…This family is considered to be closely related ...
A valley in northwest Gunma Prefecture that stretc...
...In the oropendola and cacique species, the bas...
...Unpublished manuscript (later reprinted). When...
…The extant manuscript is from the 15th century, ...