Question

Which types of cell junctions are needed in a mucosal membrane, such as the digestive tract, to keep the digestive enzymes, juices, and bacteria from leaking out?

Answer 1

Types of cell junctions are needed in a Mucosal Membrane

Tight cell junctions are needed in a mucosal membrane, such as the digestive tract, to keep the digestive enzymes, juices, and bacteria from leaking out. This types of cell junctions are located primarily in the epithelial cells which are like an intestinal brush border. Water and other fluids must be restrained from passing or drinking within the adjoining cells so that the liquids do not gradually go beyond the abdominal lining.

Tight junctions seal nearby epithelial cells in a thin zone only within their apical covering. They consist of an arrangement of claudins and different proteins. One of their primary roles is to limit the flow of ions and molecules through the cavity between the cells.

Answer 2

The correct answer is tight junctions.

Tight junctions are found mainly in the epithelial cells like an intestinal brush border. Water and other fluids must be inhibited from crossing or sipping between the neighboring cells, so that the fluids do not slowly goes across the intestinal lining.

Tight junctions seal adjacent epithelial cells in a narrow band just within their apical surface. They comprise of an alignment of claudins and other proteins. One of their essential function is to restrict the movement of ions and molecules via the space between the cells.