0
The rough ER
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What is a tenocyte?
A tenocyte is a cell in a tendon. It can also be referred to as a fibrocyte, although not all fibrocytes are also tenocytes. Tendons are mostly extracellular matrix (ECM) - in other words, non-cellular biomass, the space in between cells. The ECM is mainly composed of collagen fibers that are secreted by the tenocytes and organized into bundles. There are also proteogylcans, proteins attached to long carbohydrate chains.
What is between cells?
! If you mean animal cells, you are talking about the "extracellular matrix" (ECM), which is typically composed of proteins like collagen, of proteoglycans (e.g., chondroitin sulfate), and of pure glycosaminoglycans (usually pure hyaluronan). Some components of this ECM can be anchored to the animal cell plasma membrane, while others can be "free" in the matrix. Many solutes are present as well, including enzymes (proteins/glycoproteins). Connective tissues have an excess of ECM. "Chondrocytes", which the cells that make up the tissue "cartilage", have more ECM than cell proper by volume! If you are talking about plant cells, you need to be specific. From one plant cell plasma membrane to the adjacent (second), you would find a cell wall (cellulose, other carbohydrates, and protein), then the middle lamella (mainly pectin), and then the second cell's wall, and finally the second cell's plasma membrane. The cell walls themselves may be primary and secondary, with the secondary wall being laid down later in development, and hence closer to the plasma membrane. Less specifically, you could say the middle lamella is found between plant cells, if you include the cell wall as part of the plant cell. Cheers, Cindy R F
What are the functions of chondroblasts?
To produce cartilage needed for bone growth
What is the Role of integrins?
Integrins are receptors that mediate the attachment between a cell and the tissues that surround it, such as other cells or the extracellular matrix (ECM). In signal transduction, integrins pass information about the chemical composition of the ECM into the cell. Therefore, they are involved in cell signaling and the regulation of cell cycle, shape, and motility.
How are cells arranged into tissues?
Cells connect with other cells to make up tissues. Tissues connect and function with other tissues to make up organs. Cells interact with other cells and something called an Extracellular Matrix (ECM). You can think of the ECM is a type of sticky glue that the cells bind to. Cells also bind directly to other cells by way of desmosomes, hemidesmosomes, gap junctions, and tight junctions. Tissues are arranged in many ways depending on the types of cells they contain.
What holds the cells together?
Depends on the cell. Many cells - especially epithelial cells, which are found in a sheet, have intracellular junctions called "tight junctions", which are proteins found in the cell membranes around the edges of the cell that bond tightly to the proteins of neighbouring cells. Other cells, that have less strong (or less permanent) adhesions to each other - like a white blood cell crawling over the epithelium of a blood vessel - use different proteins and different adhesion types. However - much of your body is held together by the Extracellular Matrix (ECM). The ECM is a mass of insoluble proteins secreted by cells into the intracellular space: these proteins perform a number of roles, but one of the most important is structural. ECM proteins include fibronectin, laminin, and (most predominantly) collagen. The ECM acts as a sort of scaffold, holding the cells in place (like jelly beans embedded in jello, or bricks held together by mortar). Cells attach themselves to this protein scaffold by yet more adhesion proteins. All tissues in your body have ECM in them - but in some, the ECM is the defining characteristic of that tissue: for example, cartilage is almost entirely ECM (collagen), with a few cells embedded in it.
what is unit structure of a tissue?
The unit structure of a tissue is called a functional tissue unit (FTU). An FTU is a group of cells that are close together and are connected to each other by a network of extracellular matrix (ECM). The ECM is a complex of proteins and other molecules that provides support and structure to the cells. The cells in an FTU work together to perform a specific function.
Skin cells are attached to the extracellular matrix by?
Many cells bind to components of the extracellular matrix. This cell-to-ECM adhesion is regulated by specific cell surfacecellular adhesion molecules (CAM) known as integrins. Integrins are cell surface proteins that bind cells to ECM structures, such as fibronectin and laminin, and also to integrin proteins on the surface of other cells. Fibronectins bind to ECM macromolecules and facilitate their binding to transmembrane integrins. The attachment of fibronectin to the extracellular domain initiates intracellular signaling pathways as well as association with the cellular cytoskeleton via a set of adaptor molecules such as actin.[2]
What is a tenocyte?
A tenocyte is a cell in a tendon. It can also be referred to as a fibrocyte, although not all fibrocytes are also tenocytes. Tendons are mostly extracellular matrix (ECM) - in other words, non-cellular biomass, the space in between cells. The ECM is mainly composed of collagen fibers that are secreted by the tenocytes and organized into bundles. There are also proteogylcans, proteins attached to long carbohydrate chains.
What is between cells?
! If you mean animal cells, you are talking about the "extracellular matrix" (ECM), which is typically composed of proteins like collagen, of proteoglycans (e.g., chondroitin sulfate), and of pure glycosaminoglycans (usually pure hyaluronan). Some components of this ECM can be anchored to the animal cell plasma membrane, while others can be "free" in the matrix. Many solutes are present as well, including enzymes (proteins/glycoproteins). Connective tissues have an excess of ECM. "Chondrocytes", which the cells that make up the tissue "cartilage", have more ECM than cell proper by volume! If you are talking about plant cells, you need to be specific. From one plant cell plasma membrane to the adjacent (second), you would find a cell wall (cellulose, other carbohydrates, and protein), then the middle lamella (mainly pectin), and then the second cell's wall, and finally the second cell's plasma membrane. The cell walls themselves may be primary and secondary, with the secondary wall being laid down later in development, and hence closer to the plasma membrane. Less specifically, you could say the middle lamella is found between plant cells, if you include the cell wall as part of the plant cell. Cheers, Cindy R F
Do cancerous cells stick to the extracelular matrix?
At the start they are attached to the ECM. Then they develop MMPs and migrate or metastasise to other parts of the body. Then they bind to the ECM again. So yes they can but they spend parts of their "lifecycle" free in circulation.
You have an incorrect ECM on your 1994 Dodge Ram 1500 the serial is 5602-8276 Does anyone know which vehicle it was made for?
I just fired my ecm with that same number in my 94 ram5.9l
How do you distinguish generally between epithelium tissue and connective tissue?
There is usually more ECM than cells in connective tissue. Epithelium is a highly cellular tissue, mostly composed of cells with little matrix.
What is a major difference in the extracellular matrix ECM between plant and animal cells?
1) Plant cells have a cell wall as well as a cell membrane, animal cells only have a cell membrane 2) Plant cells have chloroplasts as well as mitochondria, while animal cells only have mitochondria 3) Plant cells tend to be more rectangular shaped and animal cells tend to be more round shaped. 4) Plant cells store glucose in the form of of starch granules and cellulose, animal cells store glucose in the form of glycogen.
How do you fix the ECM failure?
replace the ecm
Where is the ECM located on your 2000 Jimmy?
where is the ECM located on my 2000 Jimmy? where is the ECM located on my 2000 Jimmy?
How do you fix the ecm?
you can't fix an ecm, you have to replace it.
