Search results
Results from the WOW.Com Content Network
Cilia also can change structure when introduced to hot temperatures and become sharp. They are present in large numbers on each cell and move relatively slowly, making them intermediate between motile and primary cilia. In addition to 9+0 cilia that are mobile, there are also solitary 9+2 cilia that stay immobile found in hair cells. [39]
Stereocilia are cylindrical and non-motile. They are much longer and thicker than microvilli, form single "finger-like" projections that may be branched, and have more of the characteristics of the cellular membrane proper. Like microvilli, they contain actin [1] and lack an axoneme. This distinguishes them from cilia.
Stereocilia of the epididymis are not cilia because their cytoskeleton is composed of actin filaments, not microtubules. [3] They are structurally and molecularly more similar to microvilli than to true cilia. [dubious – discuss] Pseudostratified columnar epithelia are found forming the straight, tubular glands of the endometrium in females. [4]
The difference between foot processes, ... Membrane protrusions or cell appendages, extend from the cell membrane, and include microvilli, cilia, and flagella. [9]
Between the ciliated cells are numerous microvilli, attached as tufts to brush cells sometimes referred to as pulmonary brush cells; [9] these are also known as the tuft cells of the gastrointestinal tract, or intestinal tuft cells, [10] although there is a difference between the two types: the brush cells lack the terminal web that lies under ...
The nature of these "hairs" differs, with two basic forms underlying photoreceptor structure: microvilli and cilia. [26] In the eyes of protostomes, they are microvilli: extensions or protrusions of the cellular membrane. But in the eyes of deuterostomes, they are derived from cilia, which are separate structures. [24]
Cilia and flagella always extend directly from a MTOC, in this case termed the basal body. The action of the dynein motor proteins on the various microtubule strands that run along a cilium or flagellum allows the organelle to bend and generate force for swimming, moving extracellular material, and other roles.
Drawing showing the relationship between villi and microvilli of the small intestine. The luminal surface of the enterocytes have microvilli (1 micrometer long) while the cell layer itself is folded to form villi (0.5-1.6 millimeters long) and crypts. Both serve to increase the total absorption surface of the intestine.