Intercellular junctions allowing communication between adjacent cells. A. adhering junctions B. septate junctions C. gap junctions D. hemidesomosomes E. tight junctions
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- Which of the following junctions allows for cytoplasm-to-cytoplasmcommunication between cells?a. adhesion junctions c. gap junctionsb. tight junctions d. None of these are correct.Match the cellular junction with its characteristic (side of cell, cellular role, intracellular connection or transmembrane protein) tight junctions focal adhesions desomsomes gap junctions A. link the intermediate filaments of neighboring cells using homophilic cadherin-cadherin binding B. integrins link the actin-myosin stress fibers to the extracellular matrix C. occludins bind to occludins and prohibit the diffusion of membrane proteins from the baso-lateral surface to the apical surface of epithelial cells D. connexons form pores between cells in an epithelial sheet or tubeWhich 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
- Which cell junctions form junctions between cells connected to the cytoskeleton? a. tight junctionsb. hemidesmosomesc. desmosomesd. focal adhesionse. gap junctionsChoose answer of the following Which of the following junctions allows for cytoplasm-to-cytoplasmcommunication between cells?a. adhesion junctionsb. tight junctionsc. gap junctionsd. None of these are correct.Which of the following are part of adherens junctions? a. Anchor proteins b. Actin filament c. Cadherin dimers d. A and C e. All of the above
- Which of the statement about cell membrane is not true? * It contains protein molecules embedded in the lipid bilayer B. It is a differentially permeable membrane. C. It contains charged pores thus ions being O charged particles cross cell membrane much easier than neutral particles. D. It may get infolded to engulf solid or liquid material.The gap junctions of animal cells differ from the plasmodesmata ofplant cells in thata. gap junctions serve as communicating junctions and plasmodesmataserve as anchoring junctions.b. gap junctions prevent extracellular material from moving betweenadjacent cells but plasmodesmata do not.c. gap junctions allow for direct exchange of cellular material betweencells but plasmodesmata cannot allow the same type of exchange.d. gap junctions are formed by specialized proteins that form channelsthrough the membranes of adjacent cells but plasmodesmata areformed by connecting the plasma membranes of adjacent cells.e. All of the above are correct.A type of cell connection whose only function is to prevent the cellsfrom coming apart is aa. desmosome. b. gap junction. c. tight junction.
- 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 onlyIf 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 cytoplasmThe tigroid lysis is observed in a case of functional exhaustion of the neuron. It is resulted in decay of basophilic substance and brightening of the neuroplasma. What organelles changes do this phenomenon is associated with? a. Granular endoplasmic reticulum O b. Lysosomes O c. Neurofibrils d. Golgi apparatus O e. Mitochondria
