Question

which type of cell junction provides a passageway for small molecules and ions to move between cells?
desmosome
gap junction
tight junction
hemidesmosome
question 2 (1 point)
listen
epithelial tissue is connected to connective tissue by
melanin.
a basal lamina.
a reticular lamina.

Explanation:

Question 1

• Desmosomes are for cell - cell adhesion, providing mechanical strength.
• Gap junctions are channels between adjacent cells that allow small molecules and ions to pass through, facilitating intercellular communication and transport.
• Tight junctions form a barrier to prevent the passage of substances between cells.
• Hemidesmosomes attach epithelial cells to the basement membrane.

So the cell junction that provides a passageway for small molecules and ions to move between cells is the gap junction.

• Melanin is a pigment involved in skin color and protection from UV radiation, not in tissue connection.
• The basal lamina (part of the basement membrane) is the structure that connects epithelial tissue to the underlying connective tissue.
• The reticular lamina is also part of the basement membrane but the basal lamina is more directly involved in the attachment of epithelial tissue to connective tissue.

Answer:

B. Gap junction

Question 2