Questions: What type of junction would you expect to connect adjacent cells that make up the outer layers of the skin? Tight junction Adhesion junction Gap junction Petticoat junction

The answer is the first one: Tight junction.

Explanation for each option:

1. Tight junction: These junctions are crucial for connecting adjacent cells in the outer layers of the skin. They create a seal that prevents the passage of molecules and ions through the space between cells, thus maintaining the integrity and barrier function of the skin. This is the correct answer.

2. Adhesion junction: Also known as adherens junctions, these provide mechanical attachments between cells but do not form a barrier to the passage of substances. They are important for maintaining tissue structure but are not primarily responsible for the barrier function of the skin.

3. Gap junction: These junctions allow for communication between adjacent cells by permitting the passage of ions and small molecules. They are not involved in forming a barrier, so they are not the correct choice for the outer layers of the skin.

4. Petticoat junction: This is not a type of cellular junction. It is likely included as a distractor and is not relevant to the question.

In summary, tight junctions are the type of junction expected to connect adjacent cells in the outer layers of the skin, providing a barrier to protect underlying tissues.