Question

The three filtration barriers that substances must pass through when leaving the blood and entering the tubule lumen are the glomerular capillary endothelium, the epithelium of Bowman's capsule, and which other structure?
A. efferent arteriole
B. macula densa
C. basal lamina
D, granular cells

Answer 1

Answer:

C. basal lamina

Explanation:

Basal Lamina is considered as a layer of extracellular matrix located on the basal surface of epithelial cells, though closely related to the plasma membrane on the epithelial and endothelial cell bases, it is secreted by the epithelial cells and surrounds muscle and adipose tissue.

Functions of Basal Lamina are:

1. It supports the tissue structure.

2. It acts as a barrier to permeability, which helps in regulating the movement of molecules and cells.

3. It also acts as filter that allows small molecules to enter the urine in kidney cells.

4. In epidermis cells, it helps to prevent the connective tissue cells from entering the epidermis and at the same time allows the movement of white blood cells

Hence, it is therefore considered to be among the three filtration barriers that substances must pass through when leaving the blood and entering the tubule lumen