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標題: 求生物滲透作用問題ANS [打印本頁]

作者: wongyinho 時間: 10-9-18 09:36 PM 標題: 求生物滲透作用問題ANS

E個植物細胞放左入濃庶糖溶液入面1小時
因為滲透作用佢壁質分離
空個D東東咩來?_?

a.庶糖溶液 b.細胞液 c.細胞質 d.空氣

作者: Σ破月Ψ 時間: 10-9-18 09:41 PM

好美覲=.=
美覲到完全睇唔明

作者: 李媽咪 時間: 10-9-18 09:55 PM

a.庶糖溶液

掛

作者: KA-ar 時間: 10-9-18 09:55 PM

b.細胞液掛...

作者: fu_cm 時間: 10-9-18 10:02 PM

a) 庶糖溶液

作者: Σ破月Ψ 時間: 10-9-18 10:04 PM

c.細胞質

掛

作者: KA-ar 時間: 10-9-18 10:06 PM

原帖由 fu_cm 於 10-9-18 10:02 PM 發表
a) 庶糖溶液

高水勢去低水勢

點睇細胞水勢都高d

作者: fu_cm 時間: 10-9-18 10:10 PM

原帖由 KA-ar 於 10-9-18 10:06 PM 發表

高水勢去低水勢
點睇細胞水勢都高d

http://www.tutornext.com/explain-plasmolysis-deplasmolysis/7382

作者: KA-ar 時間: 10-9-18 10:11 PM

原帖由 fu_cm 於 10-9-18 10:10 PM 發表

 http://www.tutornext.com/explain-plasmolysis-deplasmolysis/7382

英文

作者: fu_cm 時間: 10-9-18 10:14 PM

Plasmolysis and Deplasmolysis

When a plant cell or tissue placed in a hypertonic solution, there takes place exosmosis. First of all, volume of the cell decreases due to exit of water from cell sap. Now the protoplasm shrinks and pulls it away from the cell wall and finally assume a spherical form. Now the cell is said to flaccid. It leaves a gap between cell wall and plasma membrane. The cell wall is porous and allows the external solution to enter through it and fill the space between the protoplasm and cell wall. The space also has water which was leached out of the protoplasm. The shrinkage of protoplasm from cell wall is known as plasmolysis. (Fig. 4.1.2.9). The stage at which the protoplasm slightly separates from the cell wall is called incipient plasmolysis. When a plasmolysed cell is placed in pure water or hypotonic solution, protoplasm regains its original form and the cell becomes turgid. This phenomenon is called deplasmolysis.

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