Strongest type of cell junction

[brlin]

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In the 7th edition EK Bio book, one of the questions (Lec 3, Pg 81, #77) is:

Which of the following statements is true concerning tight junctions?
I. They connect adjacent cells
II. They may form a barrier to extracellular fluids
III. They have the greatest strength of all cellular adhesions

I thought it was all 3, but the answer key says it's only I and II. It states that" desmosomes are anchored to the cytoskeleton and are stronger than tight junctions". But everything that I can find online says the opposite - that tight junctions are stronger.

Does anyone know which one is actually stronger?

 

[Temperature101]

In the 7th edition EK Bio book, one of the questions (Lec 3, Pg 81, #77) is:

Which of the following statements is true concerning tight junctions?
I. They connect adjacent cells
II. They may form a barrier to extracellular fluids
III. They have the greatest strength of all cellular adhesions

I thought it was all 3, but the answer key says it's only I and II. It states that" desmosomes are anchored to the cytoskeleton and are stronger than tight junctions". But everything that I can find online says the opposite - that tight junctions are stronger.

Does anyone know which one is actually stronger?

Desmosomes

 

[alfredo24pr]

In the 7th edition EK Bio book, one of the questions (Lec 3, Pg 81, #77) is:

Which of the following statements is true concerning tight junctions?
I. They connect adjacent cells
II. They may form a barrier to extracellular fluids
III. They have the greatest strength of all cellular adhesions

I thought it was all 3, but the answer key says it's only I and II. It states that" desmosomes are anchored to the cytoskeleton and are stronger than tight junctions". But everything that I can find online says the opposite - that tight junctions are stronger.

Does anyone know which one is actually stronger?

was having same difficulty but I think they reason by stating that "desmosomes are found in tissues that normally experience a lot of stress...", so therefore they have to be the strongest, if not they would break all the time.

That's all I could deduce from EK's bio book.