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Discuss the various ways cells can move materials in bulk into and out of the cell.
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- 2) Explain how the following cell transport systems work moving materials around inside the cell and other functions. Focus on structure and function, and Include how energy is used to accomplish these movements. A)Tubulin/Kinesin B)Actin/MyosinWhile performing fluorescent microscopy to observe the transport of bulk molecules into a cell a researcher uses a green, fluorescent bulk protein and a red fluorescent dye to stain the cell membrane. If the cell has the ability to transport the bulk proteins into the cell, what would we expect to see in the microscope when the images are merged? What would we expect to see if the cell did not have the ability to transport the bulk protein?. what are two structural characteristics of cell membrane determine whether substances can pass through them passively? What determines whether or not a substance can be actively transported through the membrane?
- discuss the following statement: “the structure and function of a living cell are dictated by the laws of physics and chemistry.”Briefly describe the structure and function of these cellular structures/organelles: endoplasmic reticulum, ribosomes, Golgi apparatus, mitochondria, lysosomes, peroxisomes, cytoskeleton, cell fibres, centrosome, centrioles, and cell extensions.Describe the molecular interactions that a cell uses to migrate through extracellular matrix. (use the key terms : actin, integrin, fibronectin)
- In the cell there are three types of filaments that form the cell skeleton. Answer:a)Which they are.b)How they are constructed.c)What their function is.Discuss the five ways substances can pass across the cell membrane. Give examples of eachIdentify the non-polar organic molecule which can pass freely through the plasma membrane. CH3CH2OH (ethanol) N2 (nitrogen gas) CO2 (carbon dioxide) C6H6 (benzene) C6H12O6 (glucose)
- Draw and label a cell lipid bilayer and diagram how the following transport processes take place: passive diffusion of oxygen into the cell, facilitated diffusion of potassium into the cell, active transport of sucrose into the cell. Using different symbols (circles for oxygen, squares for sucrose, and triangles for potassium ions), show the relative concentrations (gradients) of these substances on the inside and outside of the cell. For example, to show that oxygen enters the cell by going “down” its gradient, you would draw more circles on the outside of the cell than inside the cell. Be sure to show and label membrane proteins when appropriate, and show the electric membrane potential using “+”s (pluses) on one side and “-”s (minuses) on the other side of the membrane. Also show the proton pump which uses ATP as a source of energy.The cytoplasm of a certain cell is composed of a solution that is 98% water, 2% solutes. Consider the solution shown in the beaker in this picture: FOOE OOS Foor solution. [Select] Cytoplasm is 98% water, 2% solutes. The solution in the beaker would be considered when compared to [Select] The plasma membrane is impermeable to solutes. Beaker solution is 98% water, 2% solutes the cell. We would expect that the cell would [Select] if it was placed in the would account for whatever changes might occur to the volume of the cytoplasm of the cell when it is placed in the solution.Which electron or light microscopy technique would you use for the following? (also explain) For visualizing the fine structure of cellular organelles and cell architecture in the cell interior using very thin cross-sections made in Epon. To obtain sequential images of a macromolecule in order to study its activity in real-time. To obtain an extremely clear three-dimensional image of the nucleus of a single cell. What is the magnification of the image in a microscope using a 20x ocular and a 100x objective?
