Hormon Endokrin

Kita dapat merasakan makanan yang masuk ke dalam mulut itu enak atau tidak enak karena adanya peranan enzim amilase saliva.
Sekret yang dikeluarkan oleh kelenjar endokrin adalah hormon. Hormon disekresikan ke pembuluh darah,yang nantinya terdistribusi ke sel-sel tubuh dan bekerja pada sel-sel targetnya masing-masing. Hormon yang bekerja pada sel kelenjar lainnya disebut hormon tropik. Struktur hormon, terdiri dari protein, derivat, fenol, peptida, dan sterol.
Hormon terbagi atas:

• Hormon hidrofilik, yakni hormon yang bebas beredar di pembuluh darah. Hormon hidrofilik bersifat mudah larut dalam air. Yang termasuk hormon hidrofilik antara lain hormon insulin.
• Hormon lipofilik, yakni hormon yang terikat protein transport. Hormon lipofilik bersifat mudah larut dalam lemak. Yang termasuk hormon lipofilik antara lain hormon estrogen.

Kelenjar Pankreas, penghasil hormon insulin
Gambar ini diambil dari http://biologigonz.blogspot.com/2009/11/system-koordinasi-hormon.html

Central Borneo (Potensi Pengembangan)

Many forests in Indonesia are from time to time increasingly threatened to be destroyed. Damages and illegal logging were overtly spread out Developmental projects of road infrastructures, big-scale plantations, Forest Exploiting License, Industrial Plant Forest, and poorly managed transmigration lands lead the forest areas increasingly damaged. The forest damages occur also in productive plant forest. Even most of the productive forests are in extremely destroyed conditions. Meanwhile, indigenous tropical forests are only left in conservation areas such as national parks, sheltered forest and sanctuaries. Illegal loggings are never handled well, even frequently done overtly. The natural forest in Indonesia narrowed and decreased in size quickly, while wood processing industries have continuously grown, mainly paper and pulp industries. As a result, lag between wood supply and demand increases. It is the unbalance of demand and supply for wood-based raw materials that lead the increased illegal logging. From post-flood evaluations, it was known that one of the causes of forest-related disasters is the damages of forest. It is because the forests do not largely function well as agents of absorbing rainwater, regulating hydrology, preventing erosion, and supplying water in dry season. In central Borneo (central Kalimantan) Province, the damages of forest environment still occur due to illegal loggings and illegal mining. Along the course of connecting road of Palangkaraya-Buntok, for example, as long as our eyes looking at any forest areas, it is shrubs that are left and seen. Wahana Lingkungan Hidup Indonesia in the Central Borneo Province has ever recorded and reported that the forest-related damage in the province annually reached 255.918 hectares. In addition, the Local Management Board of River Stream Areas for Kahayan River noted that from 4,7 millions hectares of critical Lands in the working areas, it is just 60.000-70.000 hectares that can be reforested since 2004. At the national level, the State Minister of Living Environment, Rachmat Witoelar, has ever mentioned that figures at forest and land damages in Indonesia has extraordinarily reached 59,2 millions hectares (2006), with the rate of damage reached 1,19 hectares a year. In fact, there is still time for us to save the damaged Indonesian forest. One of the actions to save it was carried out by the Non Governmental Organization of Lestari Hutanku (Notary Act No.31/2007) whose purpose is to stop the rate of the forest damaging and to save the remaining natural forests in areas of the central Borneo Province. The NGO of Lestari Hutanku currently calls attentions and supports from societies, local governments, and private parties, all of which were concerned with the fate of damaged forests, to in implementing the vision and mission of preserving and empowering societies in the surrounding the forests with the areas of more or less 250 hectares located in the area Mengkatip Village, Dusun Hilir Sub district, South Barito Regency; Central Borneo Province.

LOCATION & TOPOGRAPHY

Geographically, South Barito Regency is located in eastward of Central Borneo Province with Position of 1°20' NL to 1°35' SL - 114° EL to 115° EL, and is wedged by North Barito Regency at northward and South Borneo Province as well as an area of Kapuas Regency at southward. At eastward, it is in a border with East Barito Regency and an area of South Borneo Regency, South Borneo. Thus South Barito Regency, especially after the program of "the dividing and the developing of region" with east Barito, has the area of 8.830 km2 in wide with the division of land making as follows:

Jungle 3773,95 km2 42,74% of South Barito in wide Swamp 2715,50 km 230,75% of South Barito in wide River & Lake 446,23 km2 5,05% of South Barito in wide Other uses 1894,32 km2 21,45% of South Barito in wide

South Barito Regency has the topography of areas as follows: North to south parts of coastal regions, along the Barito River with the altitude of 10-50 m above the sea level, are regions with potentials of sufficiently high flooding, including the Sub districts of Jenamas, Dusun Hilir, Karau Kerala, a part of Dusun Selatan, and Dusun Utara Eastern parts are the plateaus of wave-like, even hills-like, form with the altitude of approximately 400 m above the sea level, the sloping rate of 19-25%, and flowed by the branch of Barito River, including Guning bIntang Awal Sub district. In west parts, there are swamps flowed by small rivers with estuaries at the Barito Rivers.

VISION & MISSION

VISION Maintaining and protecting the sheltered forest in an area and surroundings. MISSION As a place of preserving and maintaining the wood forest in Borneo. As a pilot project for wild forest/wood prevented from forest fire. As a source of seed pool for forest wood. As a research object related to the "Kalimantan" wood. As a natural tourism object based o the "Kalimantan" wood forest. As a "trial" forest for swamp forest in Borneo. Sebagai bahan pendataan jenis hutan Kalimantan di tanah yang bergambut As a world lung. As a source of employment for surrounding society.