Q: Early endosomes are less acidic than late endosomes. True O False
A: Q30. Endosomes are basically sorting organelles within cells. They control protein and lipid…
Q: These cells are human cheek epithelial cells. What is their approximate cell size? Field Diameter =…
A: Cell counting methods are used to ensure consistent cell concentrations that are needed for…
Q: The below table has measurements of the actual length of plant and animal cells arranged in the two…
A: A plant cell contains a large, singular vacuole that's used for storage and maintaining the form of…
Q: Two cells can be operated in such a way that leads to a common continuous plasma membrane of both.a)…
A: There are four major types of junctions between the cells. These are gap junctions, desmosomes,…
Q: When given images such as the ones below, be able to identify the specific type of cell transport…
A: Introduction Active transport is a kind of movement of molecules where they move from lower to…
Q: Put the following in order of size from smallest to largest microtubules sarcomere intermediate…
A: All three types of fibres can be found in the epithelial (skin) cells of the intestine. The cell…
Q: If a sodium channel opens in a cell membrane, 1) sodium diffuses out of the cell 2) the inside of…
A: In the resting condition, a cell has high concentration of potassium ions and low concentration of…
Q: HIGH POWER FOV diameter of cells that fit across FOV (estimate) ACTUAL SIZE OF CELL= Cell size in…
A: Actual size of the cell=High Power FOV diameter ÷ No of the cell for across FOV diameter FOV : field…
Q: surface and release the protein to neighboring blood capillaries. Which Cytoskeletal element is…
A: Microtubules
Q: ESTION 16 junction is connecting the cell's cytoskeleton to the basement membrane. This is a…
A: Cell junctions, also known as intercellular bridges, are a class of cellular components that contain…
Q: specialized functions, e
A: The cell is the smallest and basic unit of life. Cells are independent of each other, they take up…
Q: Intricate network of protein filaments that extend through cytoplas Only exists in the eukaryotic…
A: The cytoskeleton of a cell is made up of microtubules, actin filaments, and intermediate filaments.
Q: Rough and smooth ERs do not require transport vesicles as these 2 ERs form connection through their…
A: Answer: Rough Endoplasmic Reticulum : It is the cell organelle present in both plant and animal…
Q: Thin and thick filament are organized into functional unit called
A: The skeletal muscles are formed by the skeletal muscle tissues. These tissues have a striated…
Q: What is NOT a type of intermediate filament
A:
Q: all the following statements which relate to apical surface modifications(brush border) of…
A: Apical surfaces The apical surfaces of epithelial cells are modified. These are modified in some…
Q: this is a Simple squamous cell agree O disagree O
A: One of the four primary tissues that function to line the internal organs, cavities and form the…
Q: A person ingests a fungus containing a toxin that blocks kinesin activity. How will cell transport…
A: Kinesin is a motor protein present in eukaryotic cells. They move on the tracks of microtubule…
Q: Match the motor protein with its biochemistry (head and tail attachments) and outcome of motor…
A: + end kinesin shows anterograde transport (from centre towards periphery of cell) Cytoplasmic dyenin…
Q: ________ prevent fluid from leaking between adjacent cells. a. Gap junctions b. Desmosomes c.…
A: Cell junctions can be described as the class of cellular structure which contains the multi protein…
Q: Adherens junctions are made up of many cadherin proteins, with their associated catenin and actin…
A: Adherens junction are protein complexes that occur at cell-cell junctions in epithelial and…
Q: The cytoskeleton is the means by which (Choose all that apply) water diffuses across a membrane…
A: The cytoskeleton is present in Eukaryotes as well as Prokaryotes. It is a network made from fibers…
Q: The cell skeleton In the cell there are three types of filaments that form the cell skeleton.…
A: Earlier idea of cell was that it was a collection of some cell organelles suspended in cell sap. But…
Q: Which of the following is FALSE? Muscle cells contain myosin II, which is responsible for…
A: option c. Incorrect Myosin 1 is not only the single head domain protein but Myosin9 also a single…
Q: Muscular dystrophy is caused by a mutation in dystrophy, and intracellular protein that binds to the…
A: Muscular dystrophy are a collection of more than 30 hereditary illnesses characterised by gradual…
Q: he cell theory is not applied for...........
A: Cell theory describes that all the living organisms are made up of one or more cells. These cells…
Q: Which of the following cell junctions is involved with anchoring the extracIular matrix to the cell?…
A: The class of multiprotein complexes that serve to provide contact or act as adhesion sites for the…
Q: The below table has measurements of the actual length of plant and animal cells arranged in the two…
A: Both plant and animal cells are microscopic.
Q: Jolene examines cells under a microscope and takes a picture. If she determines th the field of view…
A: Microscope is used to see the microscopic organisms that cannot be seen through naked eyes.…
Q: Which statement is not true about the feature of microtubules? The outer diameter is around 10 nm…
A: Cytoskeleton provides structural support to the cell. It is composed of actin, microtubules and…
Q: As a cell increases in size, its volume increases faster than its surface area Select one: O True O…
A: Prokaryotic cells, with diameters ranging from 0.1 to 5.0 μm, are much smaller than eukaryotic…
Q: 0.4 osM 0.3 osM True or false about the diagram where a cell is placed into the 0.4 osM solution:…
A: The Biological cell membranes or plasma membrane, act as barriers and gatekeeper. It is…
Q: Match the cellular junction with its characteristic (side of cell, cellular role, intracellular…
A: Cell is basic structural and functional unit of life which controls all the activities of the body…
Q: e cell. The hydrolysis of ATP is involved with this movement. Identify the most likely motor protein…
A: Option a
Q: Which of the following is NOT a calcium oxalate crystal? * rosette prismatic raphide cystolith…
A:
Q: What function of the microtubule motor proteins dynein and kinesin is blocked by the use of…
A: Colchicine treatment to block microtubules motor proteins :-
Q: What other cell ultrastructures do you expect to interact with the cell membrane?
A: The ultrastructure of a cell is its fine design as uncovered at high magnification. The animal,…
Q: Which of these associations between a cytoskeletal fiber and its function are a correct match?…
A: Cytoskeleton is present in both animal and plant cells. These are filamentous network like…
Q: In the cell there are three types of filaments that form the cell skeleton. Answer:a)Which they…
A:
Q: Plant cells are healthiest in a hypertonic environment with a net inflow of water, which expands…
A: The world outside of the cell has a higher concentration of solutes than the cell itself, making it…
Q: Cytokinesis is the division of a cell following mitosis, and is driven by the formation of…
A: Cytokinesis is the physical mechanism by which a parental cell's cytoplasm is split into two…
Q: Which transport mechanism in cell membrane does transfer substance from low to high concentration
A: The cells take up nutrients, water, ions or other substance with the help of membrane transport as…
Q: Briefly describe the function of the following: - sustentacular cell (supporting cell)
A: A sustentacular cell is a type of cell mainly associated with structural support. It can be found in…
Q: Give the actual dimensions (lenght and width) of the cell shown in this microscope drawing. You are…
A: Introduction Microscope is an instrument which helps us to observe very small object. Magnification…
Q: Excess physiologyic or pathologic stress may force the cell to a new steady state ………… .
A: All types of organ injury begin with a cellular molecular or structural change. Normal cells have a…
Q: Which of the following most accurately describes tight junctions? They allow adjacent cells to share…
A: Many tissues contain intercellular junctions between cells . Most kind of epithelium band some…
Q: Actin filaments and microtubules are similar with respect to each of the following EXCEP O inherent…
A: Microtubules, like actin filaments, are dynamic structures: they will grow and shrink quickly by the…
Q: Please explain how an intermediate filament is similar and different in a normal skin cell while in…
A: The central fibers are helix-shaped, with two strands of protein twisted together. Individual…
Q: Progeria is a rare disease that causes accelerated aging and is due to a defect in ______. \ actin…
A: Progeria is also known as Hutchinson-Gilford syndrome is a kind of progeroid illness. Progeroid…
Q: ameboid movement (cell crawling) muscle contraction (with the help of myosin) 1. microfilaments…
A: Cytoskeleton can be defined as a intracellular network of the protein filaments;which is mainly…
The actin filaments network provides mechanical support,determines cell shape, and allows for cell movements
true
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- In nonmuscle cell locomotion, which protein is activated to nucleate a filament? Arp2/3 Vinculin Gelsolin Profilin CofilinIf the graph represents one actin filament, and line A represents dynamic activity at the plus end and line B represents dynamic activity at the minus end, which of the following must be true? Group of answer choices Formin proteins have been removed. Treadmilling is occurring at 1000 mM. CapZ proteins are not present. Nucleation is occurring at 100 mM.Is tricellular junction important in cell junction specification? https://en.wikipedia.org/wiki/Cell_junction#:~:text=Cell%20junctions%20(or%20intercellular%20bridges,the%20extracellular%20matrix%20in%20animals.
- Analogs of hemidesmosomes are the focal contact sites, which are also sites where the cell attaches to the extracellular matrix. These junctions are prevalent in fibroblasts but largely absent in epithelial cells. on the other hand, hemidesmosomes are prevalent in epithelial cells but absent in fibroblasts. In focal contact sites, intracellular connections are made to actin filaments, whereas in hemidesmosomes connections are made to intermediate filaments. Why do you suppose these two different cell types attach differently to the extracellular matrix?Most cells are linked together forming a tissue and membrane junctions are important factors in this phenomenon. Compare and contrast the structure and function of a tight junction versus a desmosome versus a gap junction.Intermediate filaments (IFs) function to provide mechanical strength to the cell and for internal organization of the cells. The intermediate filament _______________ plays a key role in connecting epithelial cells to the extracellular matrix. The IF binding protein________ plays key role in connecting the IFs in the nucleus with the cytoskeleton in the cytoplasm to help position the nucleus. keratin, SUN-domain protein SUN-domain proteins, lamin lamin, keratin SUN-domain proteins, keratin lamin, SUN-domain protein keratin, lamin
- Match the following Actin filaments Intermediate filaments Microtubules [Choose ] Most concentrated just under the cell membrane and help maintain the shape of cellular projections ✓ Support cell shape and fix organelles in place Act as track for organelles and other materials to move Most concentrated just u [Choose ]Thin and thick filament are organized into functional unit calledDuring a microscopy exercise in the anatomy laboratory,a student makes the following observations about a tissuesection: (1) The section contains some different types ofscattered protein fibers—that is, they exhibit differentwidths, some are branched, some are long and unbranched,and their staining characteristics differ (some are seenonly with specific stains). (2) Several cell types withdifferent morphologies are scattered throughout the section,but these cells are not grouped tightly together. (3) Theexamined section has some “open spaces”—that is, placesbetween cells and the observed fibers in the section thatappear clear with no recognizable features. What type oftissue is the student observing? Where might this tissue befound in the body?
- Match the following to their proper description (answers may be used more than once). Gap junctions Adhering junctions Desmosomes Hemidesmosomes Tight junctions Tight junctions Tight junctions Connexons Connexons Zonulae adherens Cadherins Desmosomes Are also known as “zonulae adherens”. Are also known as “zonulae occludens”. Are calcium ion-dependent glycoproteins that mediate adhesion in adhering junctions. Are hexameric complexes formed by connexin proteins. Bind the cells to the basal lamina. Contain a central hydrophilic pore and occur in gap junctions. Contain protein filaments. Encircle the cell and provide firm connections with neighboring cells. Form seals that prevent the flow materials between adjacent epithelial cells. Form thin bands that completely encircle the cell. Permit the rapid exchange of materials between adjacent cells. Provide firm adhesion between cells via protein filaments that are coupled to intracellular filaments via a protein plaques.Microtubules are polar filaments; that is, one end is different from the other. What is the basis for this polarity, how is polarity related to microtubule organization within the cell, and how is polarity related to the intracellular movements powered by microtubule-dependent motors?Describe two similarities and two differences between actin filaments and microtubules.
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