17. Speciliased Cell Memrbane Structures Flashcards
What are som specialised cell membrane structures? What is the microvilli also known as? What kind of extension does it look like? Why does it increase surface area? Where are they usually found?
Some specialised cell membrane structures are microvilli, stereocilia, cilia and flagellum. The microvilli is also known as brush or striated border. It’s a finger like extension from the cell surface. It increases it cell surface for absorption, cell movement and phagocytosis. It is usually found in absorptive cells like intestines, kidneys and gall bladder
What is a stereocilia? Does it have a internal structure? Is it motile? Does it have a basal body? Why does it increase its surface area? Where are they found in our body?
What’s a cilia? What’s it structure? Where are they found? Is it longer than microvilli? What is it capable of moving? How is ATP involved with Cilia?
What is a flagellum? What’s it’s size? Where does it exist in the human body? How many flagellum does a cell have? What does it help its cells with?
Sterocilia are longer than microvilli and they have no internal structure which makes it not moveable. It has no basal body. It increases surface are for absorption just like the microvilli. They are found in the hair cells in our ear.
Cilia are elongated and their structure is 9+2. They are highly motile. They are found on respiratory epithelial cells. They are longer than microvilli. They are capable of moving fluid and particles. ATP is involved with cilia by being a source of energy for ciliary movement.
A flagellum is a celium with unusual length. It’s much longer than cilia. The size of flagellum is 100-200 micrometers. It only exists in males. It is a part of the spermatozoa cell. A spermatozoa is limited to one flagellum per cell. It’s function is to help the spermatozoa to move.
