Which statement are true? Constitutive secretion is the default pathway, primarily used to restore substances on the plasma membrane and certain membrane-bound organelles. Regulated secretion ends with secretory vesicles that store secreted material until the signal triggers fusion with the plasma membrane Both types of secretion use the same pathway, but the signal sequence redirects the protein to a regulated pathway. A and b A,b and c

Which statement are true? Constitutive secretion is the default pathway, primarily used to restore substances on the plasma membrane and certain membrane-bound organelles. Regulated secretion ends with secretory vesicles that store secreted material until the signal triggers fusion with the plasma membrane Both types of secretion use the same pathway, but the signal sequence redirects the protein to a regulated pathway. A and b A,b and c

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter9: Cell Communication

Section: Chapter Questions

Problem 3ITD

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As we age our skin becomes thin and easily tears. One potential reason to explain would be if adjacent cells within the skin lose the ability to attach to each other strongly. Another reason could be that cells lose the ability to attach strongly to the extracellular matrix. Compare and contrast these membrane functions and suggest which proteins might be “lost” as we age to cause the loss of attachment function in each scenario
Which of the following statements about secretion is true? O All secretory vesicles bud off the trans Golgi network and fuse with the plasma membrane continuously without any regulation. O In regulated secretion, the secretory vesicles containing secreted materials are preformed and positioned close to the plasma membrane. This allows the rapid release of a large amount of cargo in a very short period when the cell receives the right signal. O The release of insulin is a form of constitutive secretion. O None of the above
Secretory vesicles (destined for exocytosis) that fuse with the plasma membrane continuously, with no requirement for hormones or any other environmental signal, are properly referred to as: the v-SNARES constitutive secretory vesicles (like those that carry lipids, such as phosphatidylcholine) the endosomes regulated secretory vesicles (like those that carry hormones, such as insulin) the t-SNARES
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