Transport Accross Membranes

Biology 3440 (Advanced Physiology). Weds.3-5:50 p.m. 2-1-2011 Transport crossways Membranes Lab newspaper publisher admission: To begin, the main focus of this lab is to observe the impetus of ions across membranes. Membranes are barriers that allow certain things in and honor other things out. They economic helper in maintaining homeostasis. In this lab, the membrane of a Leopard frog (Rana pipens) was used. This membrane was the stomach undress of the batrachian and also the sputter of the back of the frog. From the lab handout (Christensen 2011), states that the throw together of a frog has the property of actively transporting sodium (Na?) from the remote medium as dilute 10^-5 M NaCl into the eubstance of the frog. In the wild, these frogs make love in freshwater, where solutes or ions that they occupy are diluted. The frogs scrape is designed to cooperate uptake these solutes from their environment so that they can maintain homeostasis. some other impo rtant factor that acquired immune deficiency syndrome the results in this experiment is the atomic number 11/Potassium (K?) pump. This pump is at heart humans and frogs alike. In this experiment a frogs hide was used to measure the ability of this pump to aid in transport of molecules from the external environment to the frogs internal environment. The frogs skin is trans-epithelial cells which are resembling to epithelial cells within humans.

These behave as if they are sense experience cell layer thick and the cells are required for the sodium/Potassium pump to function. The frogs skin separates the intracellular environment from t he external environment. From the lab handou! t, it states that the outside part of the skin is porous to Sodium and Chloride (Cl-) and slightly permeable to Potassium, while the inner(a) membrane is only permeable to Potassium and Chloride and slightly permeable to Sodium. This experiment was taken even further to test the unalike areas of skin from the frog to see what occurs. Methods and Materials: This lab required the side by side(p): a recently dead frog, razor blade, Pasteur pipettes,...If you want to bottom around a full essay, order it on our website: BestEssayCheap.com

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