The above scenario confirms that these are simple columnar epithelial tissue because columnar cells are tall, narrow and nucleus in the tall column like cells located at the basal end of the cells. Columnar epithelial tissue are responsible for absorption and secretion of molecules. These are present at some part of digestive tract, female reproductive tract, and respiratory system.
The type of molecules that contains the alcohol glycerol are PHOSPHO-LIPIDS. Glycerol is a three carbon alcohol on which some phospholipids are built. Phospholipids which are derived from glycerol are called phosphoglycerides.
