Secretory vesicles are transpoed ?
Correct Answer: Have no relation with concentration gradient
Description: Ans. is 'd' i.e., Have no relation with concentration gradientExocytosisExocytosis is a reverse of endocytosis. This process is involved when secretory granules are extruded from the cell. When secretory vesicle comes in contact with inside of cell membrane, the membrane of the vesicle fuses with cell membrane and then there is extrusion of the contents of vesicle from the cells as secretory granules. Similar to endocytosis exocytosis requires Ca++ and energy. Exocytosis is also called emiocytosis or reverse pinocytosis.Exocytosis (secretion from the cell) occurs two pathways : -Non-constitutive pathway :- Proteins from the Golgi apparatus initially enter secretory granules, where processing of prohormones to mature hormones occurs before exocytosis. This pathway is sometimes called "regulated pathway". ii) Constitutive pathway :- Involves the prompt transpo of proteins to the cell membrane in vesicles, with little or no processing or storage.
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now