Which of the following statements describes the function of plasma membranes?I. define the boundaries of the cell and its organelles and act as permeability barriersII. sites for specific biological and chemical functionsII. possess transport proteins that regulate the movement of substances into and out of the cell andits organellesIV. contain protein molecules that act as receptors to detect external signalsV. provide mechanisms for cell-to-cell contact, adhesion, and communicationI and IIIBI, III, IV© 1, II, IV, VD I, II, III, IV, v

Answered: Which of the following statements…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Which of the following statements describes the function of plasma membranes? I. define boundaries of the cell and its organelles and act as permeability barriers II. sites for specific biological and chemical functions III. possess transport proteins that regulate the movement of substances into and out of the cell and its organelles IV. contain protein molecules that act as receptors to detect external signals V. provide mechanisms for cell-to-cell contact, adhesion, and communication
he epithelial cells shown in the image, have an apical specialisation which is indicative of what particularly marked cellular activity? 100 um nswers A -E A Resorption of molecules B Transmission of electrical impulses along the cell membrane C Transport along the epithelial surface D Very high phospholipid synthesis E Very high protein synthesis
QUESTION 1 Matching. Match the tissue type to its anatomy or physiology. Use letters more than once. made of specialized cells called neurons and neuroglia ]made of cells, cells, and cells made of cells, extracellular proteins, and a “fluid" ground substance made of cells with lots of microfilament (actin/myosin) proteins inside them |can appear striated under the microscope Jare under another type of tissue to supply its blood needs A. connective can function as an area of absorption, secretion (letting substances pass B. epithelial through), or protection C. muscle makes up organs that gather information and make decisions about what to do and then give directions to the body D. nervous |contract coat and cover surfaces exposed to the external environment and make
Which of the following statements describes the function of plasma membranes? I. define the boundaries of the cell and its organelles and act as permeability barriers II. sites for specific biological and chemical functions III. possess transport proteins that regulate the movement of substances into and out of the cell and its organelles IV. contain protein molecules that act as receptors to detect external signals V. provide mechanisms for cell-to-cell contact, adhesion, and communication A. I and III B. I, III, IV C. I, III, IV, V D. I, II, III, IV, V
Which statement about the plasma membrane is INCORRECT Select one : a It is composed of two layers of glycoprotein molecules . b. The plasma membranes of adjacent cells may be held together by desmosomes . . It contains receptors for specific molecules d . Gap junctions may be present between adjacent cells eltis selectively permeable
Functions of cell junctions I. helps cells have a point of communication or interaction with each other II. prevents diffusion of molecules from one area of the membrane to another III. anchors the plasma membrane with other organelles for streaming in the cytosol IV. connects cells to basal surfaces for anchor II, III, Iv only I, II, III, IV I, II, IV only I, II, III only
The following is true about lipif layer of plasma membrane EXCEPT: A. Back to back layers made up of phospolipids B. Contains membrane proteins that function to transport molecules C. Composed of phospolopids that have polar tail and nonpolar head D. Allows molecules to either pass directly through the layer or through the uee of channels and transport proteins
Þescribe the structure of a generalized plasma membrane. Include the major components (lipids, proteins, glycolipids, polysaccharides). Describe transport mechanisms by which materials move into and out of cells. T
At this point, go over your answers to the activit ies given earlier in this lesson before you fill out the table below. Table 20: Interdependence of Function and Fom in the Cell Membrane Which components of the cell membrane enable it to perform this function? Function of the Cell Membrane How do these components help the cell membrane in performing this function? iully control the passage of substances through its membrane. However, all activit ort, involve energy. This leads us to another characte As stated in the first section of this lesson, maintaining homeostasis requires ise this in powering
Small pieces of matter, and even whole cells, can be transported acrossthe plasma membrane ina. membrane channels. c. receptor molecules. e. vesicles.b. carrier molecules. d. marker molecules.
Vacuoles are fluid-filled organellespresent in some cells.Which function isNOT normally performed by vacuoles?
If a tissue in the body has cells that contain a large quantity of gap junctions, this likely means that.. the cells are connected together so tight that there are no spaces between the cells the cells are not connected at all the cells are connected together so tight that it is difficult to rip them apart O the cells are connected together in a way that allows them to share cytoplasm

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