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Junctions facilitate the cells to commun...

_____Junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.

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Flow cytometry, illustrated in the figure, is a technique used to sort cells by type. The cells are placed in a conducting saline solution which is then forced from a nozzle. The stream breaks up into small droplets, each containing one cell. A metal collar surrounds the stream right at the point where the droplets seprate from the stream. Charging the collar polarizes the conducting liquid, causing the droplets to become charged as they break off from the steam. A leser beam probes the solution just upstream from the charging collar, looking for the presence of certain types of cells. All droplets containing one particular type of cell are given the same charge by the charging collar. Droplets with other desired types of cells receive a different charge, and droplats with no desired cell receive no charge. The charged. The charges droplets then pass between two parallel charged electrodes where they receive a horizontal force that directs force that directs them into different collection tubes, depending on air charge.

Flow cytometry, illustrated in the figure, is a technique used to sort cells by type. The cells are placed in a conducting saline solution which is then forced from a nozzle. The stream breaks up into small droplets, each containing one cell. A metal collar surrounds the stream right at the point where the droplets seprate from the stream. Charging the collar polarizes the conducting liquid, causing the droplets to become charged as they break off from the steam. A leser beam probes the solution just upstream from the charging collar, looking for the presence of certain types of cells. All droplets containing one particular type of cell are given the same charge by the charging collar. Droplets with other desired types of cells receive a different charge, and droplats with no desired cell receive no charge. The charged. The charges droplets then pass between two parallel charged electrodes where they receive a horizontal force that directs force that directs them into different collection tubes, depending on air charge. Another way to sort the droplets would be to given each droplet the same charge, then vary the electric field between the deflection plates. For the apparatus as sketched, this technique will not work because

The circuit in figure shows two cells connected in opposition to each other. Cell E_(1) is of emf 6 V and nternal resistance 2 Omega the cell E_(2) is of emf 4 V and internal resistance 8 Omega . Find the potential difference between the points A and B.

Assertion:- To cells of unequal emf E_(1) and E_(2) having internal resistances r_(1) and r_(2) are connected as shown in figure. Then the potential difference across any cell cannot be zero. Reason:- If two cells having nonzero internal resistance and unequal emf are connected across each other as shown, then the current in the circuit cannot be zero.

One electric cell (having emf of 2V & internal resistance of 0.1 Omega ) and other electric cell (having emf of 4V & internal resistance of 0.2 Omega ) are connected in parallel to each other. Then its equivalent emf will be _____ V.

Smaller, lipid soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain transporters which are chemically ....

ALLEN -STRUCTURAL ORGANISATION IN ANIMALS (ANIMAL TISSUE)-Exercise
  1. This epithelium is found in

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  2. epithelium is composed of a single layer of cells and functions as a l...

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  3. Theepithelium is composed of a single layer of cube-like cells. This i...

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  4. The epitheliumof nephron in the kidney has microvilli.

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  5. What is the function of cilia in paramoecium ?

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  6. Some of the columnar or cuboidal cells get specialised for secretion a...

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  7. glands secrete mucus, saliva, earwax, oil,milk, digestive enzymes and ...

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  8. epithelium is made of more than one layer (multi-layered) of cells and...

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  9. Write the functions of compound epithelium.

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  10. junctions help to stop substances from leaking across a tissue.

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  11. junctions perform cementing to keep neighbrouring cells together.

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  12. Junctions facilitate the cells to communicate with each other by conne...

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  13. Tissues are most abundant and widely distributed in the body of comple...

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  14. Connective tissues are named as connective tissues. Why?

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  15. In all connective tissues except, the cells secrete fibres of structur...

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  16. ltbr Identify A,B,C,D, E and F in the given diagram.

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  17. Connective tissues are classified into three types: (i) connective t...

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  18. Loose connective tissue which store fat is

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  19. The intercellular material of cartilage is and and resists compressi...

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  20. Most of the cartilages in vertebrate embryos are replaced by in adult...

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