Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Fensom and Spanner Electroosmotic Flow Hypothesis
In electroosmosis the ions flow across a membrane in response to electrical gradient. Ions pull along water and other contents because of solvent drag. In this hypothesis it is visualised that sap flows in the lumen of sieve element and electroosmosis occurs across the sieve plate. The basic idea of this model is represented in Figure. The pores of sieve are negatively charged and many positive ions are associated with them. The companion cells of consecutive sieve elements are shown to be engaged in K+ uptake and release. This generates a (K+) gradient in the direction of phloem sap flux; the fluxes of other solutes are coupled to K+ flux and move along with the electroosmotic flow from one sieve tube to the next.
Figure: Active uptake of K+ by the companion cell from its associated sieve tube on the left and secretion of K+ into the sieve tube at the right side by its companion cell generate both e potential difference and a K+ concentration gradient. This causes a now of K+ ions and other solutes from right hand side to left.
Which of the following serves as a sensor, or as part of a sensor, that functions only in a negative feedback system and not in a positive feedback system? A. CaSRs (Calcium-Se
Q. What is the life cycle of Plasmodium vivax? The vector mosquito bites a infected person and ingests female and male gametocytes of the parasite. Within the insect gut the ga
Explain the Procedure Estimation of the Amount of Bacteria? Now carry out the exercise following the steps enumerated herewith. 1. Prepare ten fold dilutions of E. coli cult
Effects on Materials - Air pollutants Most air pollutants are reactive chemicals, so they react with most of the substances around. You may recall from your chemistry lessons
DONO R SELECTION & KIDNEY PRESERVATION - A kidney donor should be free of hypertension, diabetes & melignancy. Cardaveric kidney is obtained from brain death person. Kidney
An amino acid is amphiprotic (have both acid and base) o Some are polar, non polar, acidic or basic List of amino acids (red are non-polar, yellow are
What do you mean by Pelvic Girdle? Bones in vertebrates which connect the appendages on left and right side of the posterior appendicular skeleton to each other. Pelvic girdles
why obelia is considered to be of special interest in zoology ass an animal showing intermediate grade of organisation
Q. What are respiratory pigments? What is the respiratory pigment present in some arthropods? Which is the analogous molecule in humans? Respiratory pigments are molecules able
Define Modes or Techniques for Chromatographic Separation In practice, chromatographic separation may take one of these modes or techniques: Paper chromatography (in w
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd