5 Steps to a 5: AP Biology 2017 by Anestis Mark & Cox Kellie Ploeger

Author:Anestis, Mark & Cox, Kellie Ploeger [Anestis, Mark]
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2016-08-04T16:00:00+00:00

Osmosis

Osmosis is the driving force that moves water from the soil into xylem cells. How in the world does the plant keep the concentration gradient such that it promotes the movement of water in the appropriate direction? There are two contributing factors: (1) the water is constantly moving away from the root tips creating the space for more water to enter, and (2) osmosis is defined as the passive diffusion of water down its concentration gradient across selectively permeable membranes. It flows from a region with a high water concentration to a region with a low water concentration. There is a higher mineral concentration inside the vascular cylinder, which drives water into the xylem contained in this cylinder by a force known as root pressure.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.