When the protein spectrin (in human red blood cells) holds the erythrocyte membrane in place, by attaching it to cytoskeletal proteins, spectrin is exhibiting: restricted movement in the membrane, based on tethering to extracellular molecules restricted movement in the membrane, based on confinement by diffusion barriers unrestricted movement in the membrane, similar to membrane lipids restricted movement in the membrane, based on attachment to other cells restricted movement in the membrane, based on anchoring to intracellular proteins

When the protein spectrin (in human red blood cells) holds the erythrocyte membrane in place, by attaching it to cytoskeletal proteins, spectrin is exhibiting: restricted movement in the membrane, based on tethering to extracellular molecules restricted movement in the membrane, based on confinement by diffusion barriers unrestricted movement in the membrane, similar to membrane lipids restricted movement in the membrane, based on attachment to other cells restricted movement in the membrane, based on anchoring to intracellular proteins

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 1ACR: When William H. was helping victims after a devastating earthquake in a region not prepared to...

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When a human white blood cell “consumes” a red blood cell (erythrocyte), this process is called: phagocytosis receptor-mediated endocytosis pinocytosis “cell-drinking” exocytosis
The classic demonstration that cell plasma membranes are composed ofbilayers depends on the following kinds of data:• The membrane lipids from 4.74 x 109 erythrocytes will form a monolayerof area 0.89 m2 when spread on a water surface.• The surface of one erythrocyte is approximately 100 μm2 in area.Show that these data can be accounted for only if the erythrocyte membraneis a bilayer.
The classic demonstration that cell plasma membranes are composed ofbilayers depends on the following kinds of data:• The membrane lipids from 4.74 x 109erythrocytes will form a monolayer of area 0.89 m2when spread on a water surface.• The surface of one erythrocyte is approximately 100 μm2in area. Show that these data can be accounted for only if the erythrocyte membrane is a bilayer.
When a human white blood cell “consumes” a red blood cell (erythrocyte), this process is called: B. receptor-mediated endocytosis C. pinocytosis D. “cell-drinking” E. exocytosis F.phagocytosis
Which protein in the human erythrocyte is properly categorized as a transmembrane protein? glycophorin A spectrin actin ankyrin none of the above
In the concept of cell physiology , differentiate white blood cells from red blood cells interms of their membrane-bound organelles.
If a membrane protein in an intact erythrocyte reacts with a membrane-impermeable reagent, what can you conclude about the protein? A. It is a transmembrane protein. B. It is a peripheral membrane protein. C. At least one domain of the protein is located on the outer face of the membrane. D. It is not a plasma membrane protein.
Which of the following is incorrect about membrane transport systems? a. Glucose transport in red blood cells is a uniport system b. The Na+/K+ ATPase is an antiport system c. The H+/K+ ATPase is an active transport system d. The chloride-bicarbonate exchanger in erythrocytes is a uniport system
Which of the following is/are true of a circulatory system (=fluid-transport system): Group of answer choices is an adaptation to large body size. All of the other choices are true. aids diffusion by reducing functional diffusion distances transports substances rapidly between distant cells/tissues.
Identify and explain two ways in which plasma membranes, composed of plasma molecules such as shown here, can remain fluid when the temperature drops.
In 1925, E. Gorter and F. Grendel used an apparatus like that described in Problem 1 to determine the surface area of a lipid monolayer formed bylipids extracted from erythrocytes of several animal species. They used a microscope to measure the dimensions of individual cells, from which they calculated the average surface area of one erythrocyte. They obtained the data shown in the table below. Were these investigators justified in concluding that “chromocytes [erythrocytes] are covered by a layer of fatty substances that is two molecules thick” (i.e., a lipid bilayer)?
Shock (failure of the circulatory system) is an abnormal condition in which blood flow is inadequate. The most common causes of shock are massive blood loss and obstruction of blood flow. As a result of shock, there is a failure to provide cells with oxygen and nutrients. In this circumstance, cells swell and lysosomal membranes rupture, among other effects. Describe how energy is generated during shock and why cell structure becomes destabilized.