Cell membrane surface modifications 1. Cilia/ Cilium a. short, hair-like cellular extensions(eyelashes b. help move substances through passageways c. located in lining of respiratory tract fallopian tube 2. Flagella a. tail-like projection b. only one per cell in humans c. aids in cell locomotion d. sperm cell 3. Microvill a small finger-like extensions of the external surface of the cell membrane b. Function= to increase surface area ocated in the lining of the digestive tracahmad ata 10 Cell Membrane Surface Modifications 1. Cilia / Cilium a. short, hair-like cellular extensions (eyelashes); b. help move substances through passageways; c. located in lining of respiratory tract & fallopian tube. 2. Flagella a. tail-like projection; b. only one per cell in humans; c. aids in cell locomotion; d. sperm cell. 3. Microvilli: a. small finger-like extensions of the external surface of the cell membrane; b. Function = to increase surface area. c. located in the lining of the digestive tract