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Svetlanka [38]
3 years ago
12

Help with both of these please!!! 15 points

Biology
1 answer:
seraphim [82]3 years ago
3 0
Shaba snakeskins sjzjz
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Which cell junctions form a barrier to the passage of materials?
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The correct answer is - tight junctions.

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Tight junctions are one of the cell-cell junctions that make a barrier to the passage of material which is a present in epithelia. This barrier is impermeable to most of the materials with soluble molecules. This barrier is made up of the occludin and claudin proteins.

Tight epithelia have tight junctions and examples of such junctions are the distal convoluted tubule or DCT, and the collecting duct of the nephron in the kidney.

Thus, the correct answer is - tight junctions.

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g If I see a decreased response after administration of repeated doses of a drug I might suspect that the cell has a) Up regulat
alexandr1967 [171]

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More than one of the above

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I strongly recommend sticking with the prescribed dosage of a drug.

A drug works by binding itself to the receptor site of a cell or tissue by non-covalent interactions.

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