Based on what you\'ve learned about tight junctions, desmosomes, and gap junctio

Question

Based on what you've learned about tight junctions, desmosomes, and gap junctions, determine which type of junction would most likely be found in the following locations in the human body, include a short justification

1) Epithelial lining of the urinary bladder (functions to prevent urine from leaking out into the body)
2)Skin
3)Epithelial lining of the stomach (functions to prevent stomach contents from leaking out into the body)
4)Cardiac muscle (the rapid spread of electric current mediated by ions is critical for cardiac muscle cells to beat in unison)
5)Which type of junction in animal cells is most similar to the plasmodesmata of plant cells?

Explanation / Answer

1) Tight junctions

Tight junctions are present in the lining so that urine cannot leak out from the body.

2) Desmosome junction

In the epidermal layer of skin desmosome junctions are present between adjacent cells.

3) Tight junctions

Tight junctions are present in the lining so that contents of stomach cannot leak out from the body.

4) Gap junctions and desmosomes

Both types of junctions gap and desmosome are present in the cardiac muscle.

5) Gap junctions in animal cells are most similar to the plasmodesmata of plant cells. Like plasmodesmata, gap junction are kind of pores for passage.

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