Concept explainers
To determine: The list, similarities, and differences between various types of cell junctions and their subtypes.
Introduction: The connections formed between cells during their period of growth and development is known as cell junction. These junctions can be temporary or permanent. Various proteins are used in the formation of cell junctions, and such protein molecules are called cell adhesion molecules (CAMs).
To determine: An example of location of every type of cell junction and its function in the body.
Introduction: Cell junctions are also termed as intercellular bridge. These are found in multicellular organisms made up of protein complexes. They are present in large quantity in epithelial cells.
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Human Physiology: An Integrated Approach (8th Edition)
- The trans epithelial electrical resistance (TEER) is a characteristic property of an epithelium. Which of the following statements best describes the TEER? a.) A high trans epithelial electrical resistance (TEER) is an indicator of a leaky epithelium in which paracellular diffusion of solute is likely to be high b.) A high trans epithelial electrical resistance (TEER) is an indicator of a tight attachment between the epithelium and the basement membrane in which diffusion of solute across the basolateral surface is likely to be low c.) A high trans epithelial electrical resistance (TEER) is an indicator of a tight epithelium in which paracellular diffusion of solute is likely to be lowarrow_forwardDescribe, with a picture, the asymmetry of the plasma membrane including details of the important pointsarrow_forwardBecause the plasma membrane is selectively permeable, nothing can diffuse through the bilayer. True or Falsearrow_forward
- Which of the following is NOT an accurate description for epithelial cells? a. glycoprotein-covered b. interconnected c. held together by tight junctions d. symmetricalarrow_forwardAnchoring junctions are important in distributing of mechanical stress and maintains the integrity of epithelial cell layerarrow_forwardMatch the following with the term that best describes them integral part of the plasma membrane can easily cross the semi-permeable plasma membrane cellular currency of cell that enables it to transport molecules against the concetration gradient (i.e active transport) act as channels carriers to transport polar molecules like sugars into cells A. phospholipids B. proteins C. ATP D. oxygenarrow_forward
- • Describe the three main types of cell-cell adhesion. • Explain unassisted membrane transport and protein assisted membrane transport. • What is osmosis? Osmotic pressure? Tonicity?arrow_forwardThe extracellular matrix is composed mainly of?arrow_forwardMatch the following letters to the designated number. Please make sure to answer all 5 numbers Cell junctions of epithelium Description Function 1. Gap junction A. extensive bands a. dissipates physical forces 2. tight junction B. ring of plasma membrane b. anchor cells together 3. Adherens C. half zonula adherens c. cell communication 4. Desmosomes D. intercellular cement d. anchor cells to the basal lamina 5. Hemidesmosomes E. half macula adherens e. prevents organ content from leaking F. bridge by transmembrane f. resist separation G. linked by transmembrane glycoproteins g. contact points the answer should be for example: 1. A-darrow_forward
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