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- When the protein spectrin (in human red blood cells) holds the erythrocyte membrane in place, by attaching it to cytoskeletal proteins, spectrin is exhibiting: restricted movement in the membrane, based on tethering to extracellular molecules restricted movement in the membrane, based on confinement by diffusion barriers unrestricted movement in the membrane, similar to membrane lipids restricted movement in the membrane, based on attachment to other cells restricted movement in the membrane, based on anchoring to intracellular proteinsDefine the definition of carrier mediated transport process in the cells.SITUATIONAL ANALYSIS: Rengoku was admitted in the hospital due to high fever ranging from 39.0 °C - 40 ° C. He is nearly convulsing when he got to the nearest ER. Upon initial diagnosis, Rengoku has a localized infection that needs to be treated by an antibiotic and anti-pyretic medications to lower down the body temperature. Explain the role of the cellular transport mechanism in making sure that Rengoku will be going back to his normal body temperature and the effects of having high body temperature to his enzymatic activity.
- You want to understand how the density of P-selectin in blood vessel walls affects the rolling interactions of neutrophils when they are subjected to hydrodynamic drag forces in the blood. You introduce P-selectin into a synthetic lipid bilayer and attach it to a glass slide mounted in a flow chamber. This arrangement allows you to measure neutrophil attachment at different densities of P-selectin and at different flow rates. At high densities, from 30 to 400 P-selectin molecules per µm², the neutrophils attached to the membrane and rolled very slowly and jerkily in the direction of the flow (see cell 1 in the figure). At the same flow rate, but at a density of 15 P-selectins per µm², the neutrophils behaved differently: they either moved at the flow rate of the medium or were transiently tethered-horizontal lines marked by t-before moving again (cell 2 in the figure). Neutrophils showed this same behavior at a density of 1 P-selectins per μm² and half the flow rate: moving at the flow…Simple diffusion is defined as the movement ofDescribe the shape of transporting cells observed. Was it simple or stratified? Are the junctions between cells tight or leaky? Why does this histology support their function?
- What is the Description and Examples in the body of these Cell transport? Explain in 2-3 sentencesDescription:Examples in the body: 1. Bulk Transport 2. Phagocytosis 3. Pinocytosis 4. Receptor-Mediated EndocytosisConsidering that antibodies are proteins that will be released from the cell, which types of cytoplasmic organelles are likely tobe found in high numbers in plasma cells? (See table 3.1 for a summary of organelles and their functions.)Explain What are Nod factors and what do they do?
- Usually , rates of diffusion vary inversely with molecular weights; so smaller molecules diffuse faster than do larger ones. In cells, however, calcium ion diffuses more slowly than does cAMP. Propose a possible explanation.Define lysozymeIn 5 to 10 sentences. Explain how transport mechanism in cells works.