question_answer 30)

  Intestine absorb the digested food materials. What type of epithelial cells are responsible for that? (a) Stratified squamous epithelium                          (b) Columnar epithelium (c) Spindle fibres                                                              (d) Cuboidal epithelium

Answer:

  (b) Columnar epithelium consists of pillar-like cells with their nuclei towards the base. They form the lining of stomach, small intestine and colon, forming the mucous membrane. Their main function is absorption (e.g., stomach, intestine) and secretion (e.g., mucous by goblet cells). Stratified squalors epithelium, also known as pavement epithelium is covered by fibrous protein, (keratin) that covers the skin. This epithelium is waterproof and resistant to mechanical injury, Cuboidal epithelium is found in kidney tubules, thyroid vesicles and in glands.