Cytokines trigger endothelial cells to express specific receptors called selectins, which bind to carbohydrates on the surface of neutrophils.
Cytokines are the proteinaceous structures predominant in cell signaling. They also regulate the growth of immune cells and blood cells. They can also occur in the form of glycoproteins. The example of cytokines are interleukins, interferons, chemokines and Tumor Necrosis Factor (TNF).
Selectins are the transmembrane proteins that span the lipid bilayer only once. They belong to the family Cell Adhesion Molecules. They perform role in processes like inflammation, lymphocyte homing, immunological responses, etc. They are localized on the membranes of endothelial cells, leukocytes and platelets.
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Genetic mutation and evolving to the point that mating would become extremely hard between the species
Answer:
<em>The sciatic nerve is not an epithelial structure.</em>
Explanation:
The sciatic nerve can be described as the largest nerve of the body. The sciatic nerve is formed when 5 nerves from the lower spine join. Hence, the sciatic nerve is not an epithelial structure. It is such long that it goes all the way from top of the leg till the foot. The sciatic nerve is involved in supplying sensations to the feet and to the skin.
<span>This is a true statement. Viruses in the same family have the same types of genomic structure. This allows them to enter a cell and replicate their information with the host much easier than if they did not share similar types of internal information.</span>
