Free Cell Membrane Essays and Papers

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  • GLUT4 metabolic processes

    604 Words  | 3 Pages

    up by muscle cells it must be transported through the GLUT 4 transporter, a integral membrane protein which translocates from inside the cell to the plasma membrane in response to muscle contraction and high blood glucose levels.(textbook) When muscle cells are subject to long periods of intense physical activity their need for glucose as a form of energy increases drastically. Using experiments that focus on glucose concentration and blood flow from the blood stream into muscle cells it was found

  • Tetraspanins: An Important Glycoprotein

    749 Words  | 3 Pages

    Tetraspanins also known as tetraspans or the transmembrane 4 superfamily (TM4SF) are type III membrane glycoproteins which span the plasma membrane four times found in all multicellular eukaryotes. They consist of four transmembrane domains, intracellular N- and C-termini and two extracellular domains, one short (called the small extracellular domain or loop, SED/SEL or EC1) and one long, usually 100 amino acid residues (the large extracellular domain/loop, LED/LEL or EC2) that is subdivided into

  • The Effect Of Temperature On Beetroot Membranes

    825 Words  | 4 Pages

    temperature on the beetroot membranes Aim of the research: The aim of this investigation is to determine what kind of effect will the increasing temperature have on the plasma membrane of a beetroot cell. Introduction The beetroot contains a red pigment that is kept in the cells by the membranes. If the membranes are damaged, the pigment “betalain” will leek out. The amount of pigment that leeks out can be assessed, as “betalain” will colour any water that surrounds the cell. If the water with the

  • Comparing the Mechanisms of GLUT4 Translocation During Exercise and in a State of Rest

    549 Words  | 3 Pages

    important energy-rich molecule that is taken up into cells upon stimulation by insulin. Muscle glucose uptake is composed of primarily three steps that can be regulated: glucose delivery, glucose transport, and phosphorylation (Howlett et al. 2013). The transport of glucose into the muscle cell must be facilitated by the intermembrane transport protein, GLUT4 (Howlett et al. 2013). It follows that insulin regulates the presence of GLUT4 on the plasma membrane. Studies show that the exocytosis of the intracellular

  • Osmosis Investigation

    790 Words  | 4 Pages

    dilute system solution to a concentrated solution, through a partially permeable membrane. Water molecules are able to pass through the cell membrane because they diffuse whereas sugar molecules are larger and cannot diffuse as easily therefore not being able to pass through. Cell membranes are like visking tubes because they will let some substances through but not others. They are partially permeable membranes. Osmosis is a very important process which enables plants to support themselves

  • Benefits Of Optogenetics

    999 Words  | 4 Pages

    not exactly, but the state of the art new technology, Optogenetics, does offer an innovative new approach to the study of the brain, and, more importantly, the treatment of patients. The use of light had been surmised to be a valuable way to control cells many years prior by Francis Crick (Crick 2024), but no one had been able to pull all the pieces together. While it’s by no means perfectly safe: there are still uncertainties about the long-term effects and the level of specificity it offers can only

  • Bacteria Host in Squid Samples

    389 Words  | 2 Pages

    scolopes: Description of a Population of Host Cells in Association with the Bacterial Symbiont Vibrio fisceri. Biol. Bull. 195: 89-97 Upon collecting a species of squid, Euprymna scolopes, from the coast of Oahu, Hawaii, it was revealed that a light organ contained near its mandible is host to a bioluminescent bacteria, Vibrio fisceri. These light-organ crypts have lateral pores that expel a dense matrix consisting of live and dead host cells with the bacterial cells often adhered to their surface, in response

  • The Role of Gamma Secretase in Alzheimer's Disease

    1029 Words  | 5 Pages

    of substituted Cysteines. J nerosci,26: 1281-12088 (pub med) Takagi s, Tominaga A, Sato c, Tomita T Iwatsubo T 2010. Participation of trans membrane domain 1 of presenilin 1 in the catalytic pore structure of γ-secretase. J neuro Sci 30. 15943-15950 (pub med) Tolia A, Chavez –Gutierrez L, De strooper B 2006, Contribution of presenillin trans membrane domain 6 and 7 to a water containing cavity in the γ-secretase complex. J boil Chem 281: 27633-27642 (pub med) Zhang C, Wu B, Beglopovlos V,

  • G Proteins

    944 Words  | 4 Pages

    G Proteins Proteins play various important roles in inter-neuronal communication. Receptor sites are made up of proteins and the ion channels in the cell membranes are proteins. The link between the receptor sites and the protein channels sometimes is the guanine nucleotide-binding protein, better known as G Protein. (1) The basic structure and function of these shall be explored in the following. In order for neuron communication to occur, the post-synaptic neuron must have receptor sites

  • Essay On Ion Transport

    630 Words  | 3 Pages

    channels, in particular, play an important role in physiological functions such as the generation of electrical activity in nerves and muscle, volume regulation of cells, intracellular signaling and so on. Malfunctioning channels have been linked to wide range of diseases. For instance, abnormal sodium channels in membranes of muscle cell cause Hyperkalemic Periodic Paralysis and abnormal potassium channels results in heart arrhythmia. It is also known that malfunctioning chlorine channels are the