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.
Q. Show How Adaptation affecting taste quality? Adaptation - A low concentration solution will not give any sensation after tasting a higher concentration solution due to the a
Recycling of Plasma Membrane Components During exocytosis secretory vesicles fuse with plasma membrane, adding to the membrane surface area. Yet, the surface area of plasma me
Solar Energy Input We know that the spectral distribution and the intensity of solar radiation incident on the earth's surface are known. Of the enormous'amount of energy that
Radial cleavage - Metazoa Radial cleavage produces tiers or layers of cells one on top of another. Radial cleavage is also said to be indeterminate or regulative because each
In some types of cells, the cell membrane present differentiations that are essential for the specific functions of the cells. The major differentiations are the microvilli and the
What are the factors responsible for corneal hydration? The factors responsible for corneal hydration are as follows: i. Stromal swelling pressure ii. Barrier function of
What do alcohol and illicit drugs do to the brain Whether its alcohol, nicotine, prescription painkillers, heroin, or cocaine addictive substances change the brain in fundament
Types of Gonads The gonads of vertebrates can be classified into the following two types Mammalian type and Non-mammalian type. They differ from
If the chemical formula of a substance is C17 H 31 COOH, what can you tell about the identity and amounts of elements in the molecule? Can someone please explain me this?
The scientist who described cells as “many little boxes” was
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