Tiny projections on the free surface of some epithelial cells; increase surface area for absorption
Microvilli is plural and Microvillus is singular.
microvilli are ONLY found in animals
Microvilli are also called Cilia
The presence of microvilli typically indicates that the cell is involved in absorption, as microvilli increase the surface area of the cell membrane, allowing for more efficient nutrient absorption. Cells with microvilli are commonly found in tissues involved in absorption, such as the small intestine.
Microvilli
the microvilli
The core of microvilli is attached to the plasma membrane. It also contain a bundle of about 40 filaments of actin.
The folds of the plasma membrane that increase the cell's surface area are called microvilli. They are small, finger-like projections found on the surface of certain types of cells, particularly in cells involved in absorption, to increase the surface area for better nutrient absorption.
One way to increase membrane surface area is to introduce folds or projections in the membrane structure. These folds, known as microvilli or villi, can significantly increase the surface area available for processes such as diffusion and absorption to occur. Another method is to use specialized structures like cilia or flagella that further increase the surface area while also providing motility.
Yes of course. Due to the Golgi Apparatus interacting with the chloroplasts in the palisade cells coupled with the protein synthesis in the lac operon, the microvilli will be present to digest the proteins synthesised by osmosis. This results in the excretion of toxins by the bacteria and in certain species causing sympatric speciation.
Microvilli cells are simple columnar epithelium. Stratified epithelia don't have cilia or microvilli because they are on the inner layers of epithelia. Think about it, cillia and microvilli are used to help the processes of absorption and secretion within the lumen. ex: upper respiratory tract.
There's some confusion here. The stomach lacks microvilli as it is NOT an organ of absorption. It's function is to churn your food into an isotonic mush ... so that your small intestines, which do have microvilli, can absorb nutrients.