Functional principles of excretory organs, Biology

Functional Principles of Excretory Organs

Before studying about the excretory organs, it is important to learn about the basic concepts of osmolarity and membrane permeability. The presence of dissolved solute confers on a solution the property of osmotic pressure. Like other colligative properties, osmotic pressure or osmotic concentration f a solution depends on the P number of dissolved particles present per unit volume. While the chemical concentration of a solution is expressed in molarity (molesilitre), osmotic concentration of a solution is expressed in dsmolarity (osmoleditre). For ideal non-electrolytes (e.g., sucrose), a one molar solution is one osmolar.

An electrolyte solution, on the other hand, has a higher osmolarity than its molaiity. For example, Nacl in the solution dissociates into Na+ and Cl-. Thus, for everymolecule of NaCl, one gets two ionic particles in solution, one of Na+ and one of Cl-. Hence, one molar NACl solution is early two osmolar. In the same way, one molar CaCl2 solution is nearly three osmolar. An osrnole is defined as that amount of a solute which when dissolved in one litre of water has the same osmotic pressure as one mole of an ideal non-electrolyte in one litre of water. If two solutions (solution A and solution B) have the same osmotic concentration, they are said to be isopathic to each other. If solution A has a higher osmolarity than solution B, A is hyperosmotic to B or B is hypoosmotic to A.

Posted Date: 1/16/2013 2:18:49 AM | Location : United States







Related Discussions:- Functional principles of excretory organs, Assignment Help, Ask Question on Functional principles of excretory organs, Get Answer, Expert's Help, Functional principles of excretory organs Discussions

Write discussion on Functional principles of excretory organs
Your posts are moderated
Related Questions
Nasopalatine nerve and vessels Found in the nasopalatine canal, must be taken care off when placing implants in the maxillary incisor region. Subperiosteal implant placement o

Microorganisms that survived the preservation and shortage treatment applied to the food Different microorganisms have different susceptibility to the preservative methods empl

Define the Contraceptive Morbidity Contraceptive morbidity, which covers any condition that result from efforts (other than abortion) to limit fertility, whether they are tradi

Some organisms contain enzymes that condense a fatty alcohol and a fatty acid to generate wax esters. Draw decanol, plamitic acid (C16:0 fatty acid) and the resulting wax ester gen

What is Cartilage explain briefly? Some bones, such as the bones in the skull, develop directly from membranous connective tissue, but in human fetal development, most of the s

What Is the advantage of having a coelomic body cavity

A "phosphodiester bond" links together: Answer the 3' hydroxyl group and the N9 atom of adenine in ATP. The Phosphate group and N9 atom of adenine in ATP. Sequential nucleosides in

Starch is a large molecule consisting of between 300 to 500 glucose molecules joined together.  A glucose molecule is only very small, consisting of 24 atoms.  Cellophane is simila

critera for the animal classification

Q. Illustrate the major cells of the nervous system? The major cells of the nervous system are the neurons. as well the neurons the nervous system is also constituted of glial