thways as endocytosis, export from the ER to the Golgi, and transport between Golgi cisternae. But so far, no coat has been identified for the secretory vesicles that carry material from the Golgi to the plasma membrane. Do you think such a coat is likely to exist? Justify your answer. 2. A muscle cell contains acetylcholine receptors that act as ligand-gated cation channels, and it also contains voltage-gated Na+ channels of the type found in neurons. In theory, could a muscle cell get away with having only acetylcholine-gated cation channels, which would serve the dual purpose of receiving neurotransmitter signals and propagating action potentials? Why or why not? 3. Fluorescent FM dyes partition reversibly into biological membranes without penetrating through them. Suppose that you have neurons cultured in a dish. You incubate the neurons with an FM dye, and then you wash them with medium to remove the dye. a) You find that if the neurons are stimulated to trigger action potentials during incubation with the dye, the synaptic regions of the neurons remain fluorescent after the wash. Propose an explanation for this effect.
thways as endocytosis, export from the ER to the Golgi, and transport between Golgi cisternae. But so far, no coat has been identified for the secretory vesicles that carry material from the Golgi to the plasma membrane. Do you think such a coat is likely to exist? Justify your answer. 2. A muscle cell contains acetylcholine receptors that act as ligand-gated cation channels, and it also contains voltage-gated Na+ channels of the type found in neurons. In theory, could a muscle cell get away with having only acetylcholine-gated cation channels, which would serve the dual purpose of receiving neurotransmitter signals and propagating action potentials? Why or why not? 3. Fluorescent FM dyes partition reversibly into biological membranes without penetrating through them. Suppose that you have neurons cultured in a dish. You incubate the neurons with an FM dye, and then you wash them with medium to remove the dye. a) You find that if the neurons are stimulated to trigger action potentials during incubation with the dye, the synaptic regions of the neurons remain fluorescent after the wash. Propose an explanation for this effect.
Biology 2e
2nd Edition
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter4: Cell Structure
Section: Chapter Questions
Problem 20RQ: Which of the following do not play a role in intracellular movement? microfilaments and intermediate...
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