Search results
Results from the WOW.Com Content Network
In the chicken egg, the yolk is separated from the albumen by the vitelline membrane which acts as a barrier to microbial infection. [7] Apart from the 13 proteins identified [ 4 ] to make up the membrane, the proteins that are key to providing antimicrobial properties to the membrane are the vitelline outer membrane proteins (VMO) 1 [ 8 ] and ...
An osmoreceptor is a sensory receptor primarily found in the hypothalamus of most homeothermic organisms that detects changes in osmotic pressure.Osmoreceptors can be found in several structures, including two of the circumventricular organs – the vascular organ of the lamina terminalis, and the subfornical organ.
The process of osmosis over a semipermeable membrane.The blue dots represent particles driving the osmotic gradient. Osmosis (/ ɒ z ˈ m oʊ s ɪ s /, US also / ɒ s-/) [1] is the spontaneous net movement or diffusion of solvent molecules through a selectively-permeable membrane from a region of high water potential (region of lower solute concentration) to a region of low water potential ...
Copper's essentiality is due to its ability to act as an electron donor or acceptor as its oxidation state fluxes between Cu 1+ and Cu 2+ . As a component of about a dozen cuproenzymes, copper is involved in key redox (i.e., oxidation-reduction) reactions in essential metabolic processes such as mitochondrial respiration, synthesis of melanin ...
In animal cells excessive osmotic pressure can result in cytolysis due to the absence of a cell wall. Osmotic pressure is the basis of filtering ("reverse osmosis"), a process commonly used in water purification. The water to be purified is placed in a chamber and put under an amount of pressure greater than the osmotic pressure exerted by the ...
Aside from structural functions, it is also a barrier that permits the diffusion of water and nutrients, and in chickens especially, it is a barrier against microbial infection. Vitellin comprises a vast fraction of the proteins found in eggs, and due to this, they are easily characterized with biochemical methods in order to elucidate ...
It occurs in a hypotonic environment, where water moves into the cell by osmosis and causes its volume to increase to the point where the volume exceeds the membrane's capacity and the cell bursts. The presence of a cell wall prevents the membrane from bursting, so cytolysis only occurs in animal and protozoa cells
Candling an egg. Candling is a method used in embryology to study the growth and development of an embryo inside an egg.The method uses a bright light source behind the egg to show details through the shell, and is so called because the original sources of light used were candles.