To discuss:
How vesicular transport differs from other modes of membrane transport; the distinction between endocytosis and exocytosis; different forms of endocytosis; and physiological relevance of each kind of vesicular transport with examples.
Introduction:
Cells are regarded as the simplest unit (structural and functional) of life. Cellular membrane, nucleus, and cytoplasm are the three major components of a cell. Cellular membrane, which surrounds the entire cell, is composed of phospholipids and proteins. The nucleus is bound by a nuclear membrane, and it possesses the genetic material of the cell. Cytoplasm consists of organelles, cytoskeleton (filaments and tubules), and inclusion bodies. Protoplasm denotes all living material that are present in the cell enclosed by the cellular membrane (inside and outside the nucleus).
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ANATOMY+PHYS VOL 1(CHP 1-17) >CUSTOM<
- Which substances cannot pass directly through the phospholipid bilayer of the plasma membrane.arrow_forwardBecause the plasma membrane is selectively permeable, nothing can diffuse through the bilayer. True or Falsearrow_forwardWhich is not required for passive transport across a membrane (select all that apply and explain why): a concentration gradient a cotransported ion energy a protein channelarrow_forward
- Explanation of the operation of the membrane bioreactorarrow_forward"Tight junctions perform two distinct functions: they seal the space between cells to restrict paracellular flow and they fence off plasma membrane domains to prevent the mixing of apical and basolateral membrane proteins" is true or false.arrow_forwardHow inclusions differ from organelles; the origins and types of inclusionsarrow_forward
- Which of the following membrane transport mechanisms requires expenditure of metabolic energy? active transport of water facilitated transport of valine coordinated transport of Na+ and K+ against concentration gradient. diffusion of steroidsarrow_forwardtrue or false The plasma membrane is made up of two layers of phospholipids making it a lipid bilayerarrow_forward1) whether the statement is correct or incorrect and 2) the reasoning for your answer. Your answer should demonstrate your understanding of the physiological concepts underlying the statement and be professionally written. Assume a cell with the following properties: [Na]out = 120 mM; [Na]in = 12 mM [K]out = 5 mM; [K]in = 125 mM Membrane is permeable only to Na+ and K+ If the plasma membrane of the cell becomes more permeable to Na+, both influx of Na+ into the cell and the Na+ equilibrium potential will increase.arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning