Question

The intestine absorbs the digested food materials. What type of cell is responsible for that?

• A. Stratified squamous epithelium
• B. Columnar epithelium
• C. Spindle fibres
• D. Cuboidal epithelium

Answer 1

The correct option is B

Columnar epithelium

The correct option is B.

Explanation of the correct option:

1. There are two further classifications for simple columnar epithelium: ciliated and non-ciliated (glandular). The ciliated portion of the simple columnar epithelium assists in moving mucus and other materials along the respiratory system.
2. Simple columnar epithelium cells have a tall, narrow form that resembles a column. While the basal side of the tissue confronts the foundation membrane, the apical surfaces face the organ lumen. Along the basal side of the cell, the nuclei are placed closer together.
3. The apical side of an absorbent columnar epithelium is characterized by a striated border made up of non-motile microvilli, which increases the surface area for absorption. The term "ciliated columnar epithelium" refers to them.
4. Glandular goblet cells, which compose the Simple columnar epithelium, secrete mucins to create mucin. The mucin-secreting secretory granules, which are located on the cell's apical surface and are membrane-bound, make up the majority of the cell's cytoplasm.

Explanation of the incorrect options:

Option A:

1. Pavement epithelium, also known as the stratified squamous epithelium, is covered by keratin, a fibrous protein.
2. This epithelium is resistant to mechanical harm and watertight.

Option C:

1. A protein structure called a spindle fiber divides a cell's genetic material.
2. In both mitosis and meiosis, two types of nuclear division, the spindle is required to divide the chromosomes in a mother cell into two daughter cells in an equal number. The spindle fibers are known as the mitotic spindle during mitosis.

Option D:

1. The renal tubules and glandular tissue both include simple cuboidal epithelium. The stomach and intestines are lined with simple columnar epithelium.
2. Epithelial cells with a distinctly cuboidal shape make up the cuboidal epithelium. The cuboidal epithelium is made up of cells that are roughly the same width as they are tall. Thus, it has a cube-like shape (thus, the name). From above, it looks to be square in shape.
3. Cuboidal epithelial cells primarily perform three tasks: absorption, secretion, and protection. Specialized features (such as microvilli or cilia) protrude from some cuboidal epithelial cells.

Final answer: For the absorption of digested food materials in the intestine is the columnar epithelium.