Begin Again

from :  http://www.basesciences.com/article.asp?articleid=98927&Sodium-Spurs-a-Tadpole-to-Regenerate-Its-Tail if a young tadpole loses its tail, no problem—it can grow a new one. Biologist Michael Levin and his team experimented with this amphibian talent, and they say they found the signal  that triggers the regeneration: sodium. If scientists can find the trigger in tadpoles, perhaps someday they could find triggers for other species. Maybe even humans. By using drugs to prompt a flood of sodium ions into injured nerve cells, biologists from Tufts University were able to regenerate severed tadpole tails — complex appendages containing spinal cord, muscle and other tissue. The sodium infusion got tadpoles to regrow lost tails even if scar tissue had already formed over the wound. Conversely, blocking the flow of sodium ions to the nerve cells prevented the regeneration. One particular [sodium]-importing channel, called NaV1.2, was required for tail re...

ayo teman-teman belajar perkembangan tumbuhan! aku masih coba pake bilingual hehe. these are some of our speciment and original my own documents, i didnt grab it from anywhere ! :D STOMATA The leaf  epidermis of Sri Rejeki plant ( idk, latin name of its. i just write the name based on my practical handbook) .  it is covered with pores called stomata , part of a stoma complex consisting of a pore surrounded on each side by chloroplast-containing guard cells , and two to four subsidiary cells that lack chloroplasts.The stoma complex regulates the exchange of gases and water vapor between the outside air and the interior of the leaf. The stoma is bounded by two guard cells that differ from the epidermal cells. TRIKOMA pada daun  Hibiscus tiliaceus terlihat adanya trikoma. trikoma adalah rambut-rambut yang merupakan turunan/ derivat dari epidermis. pada daun Hibiscus tiliaceus (waru ) yang saya amati, trikoma yang terlihat adalah jenis rambut bercabang dan...