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- Where is insulin stored, and why would it be released?Why might negative feedback mechanisms be more common than positive feedback mechanisms in living cells?Ca2+ Using Figure 8.1, answer the following questions: 6) What is occurring in Step 2 of the figure above, and how is that process originated? 6) 7) Identify the structures on the postsynaptic membrane that bind with the neurotransmitter 7) in Steps 4 and 6 of the figure above, and indicate their function. 8) In the figure above, the overall function of Steps 6-8, which occur simultaneously, is to 8) 9) Based on the figure, describe the two possible mechanisms whereby Step 5 can occur on the postsynaptic membrane. 9) 10) Based on the figure, identify the structure in Step 6, if this presynaptic neuron is cholinergic. What if the neuron is adrenergic? 10)
- Why is receptor-mediated endocytosis said to be more selective than phagocytosis or pinocytosis?Why is it important that there are different types of proteins in plasma membranes for the transport of materials into and out of a cell?What would happen if the intracellular domain of a cell-surface receptor was switched with the domain from another receptor?
