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How does the collagen structure of hypertrophic scars differ from that of keloids?

Hypertrophic scars have an overproduction of collagen that remains within the boundaries of the original wound, resulting in raised, red scars. Keloids, on the other hand, have an excessive production of collagen that extends beyond the original wound site, leading to smooth, shiny, and raised scars that can grow larger than the original injury.


Where are sharpey's fibers found?

Sharpey's fibers are found at the junction between tendons, ligaments, or joint capsules and bone, where they anchor these structures to the bone. They are primarily composed of dense collagen fibers that penetrate into the bone matrix, providing strength and stability to the attachment site.


The site of origin of the preganglionic fibers of the parasympathetic nervous system is?

brain stem and the sacral region of the cord


What protein is involved in formation of scar tissue?

Fibroblasts are the main cells involved in the formation of scar tissue. They produce collagen, a type of protein that helps repair and strengthen damaged tissue, ultimately leading to scar formation. Fibroblasts migrate to the injury site and lay down collagen fibers to remodel the damaged area.


What joins arms together and is the place where spindle fibers attach to each chromosome?

The sister chromatids (arms) are held together by centromeres. Centromeres are the site of attachment for the spindle fibers.


What protein forms a bridge between exposed vessel wall collagen and platelet surface receptors?

The protein that forms a bridge between exposed vessel wall collagen and platelet surface receptors is von Willebrand factor (vWF). When blood vessels are damaged, vWF binds to collagen fibers in the vessel wall and simultaneously interacts with platelet glycoprotein receptors, particularly GPIb-IX-V, facilitating platelet adhesion and aggregation at the site of injury. This process is crucial for the formation of a stable platelet plug during hemostasis.


Can you pop a keloid and what is in a keloid?

You should not pop a keloid, as doing so can lead to further irritation, infection, or increased scarring. A keloid is an overgrowth of scar tissue that forms at the site of an injury, consisting mainly of collagen fibers. They can be raised, thick, and may continue to grow beyond the original wound site. Treatment options are available for keloids, but self-intervention is not recommended.


Synapse site for afferent fibers to sensory cortex?

Thalamus


What is the attachment site of spindle fibers on the chromatids?

kinetochore


What is a myosepta?

Myosepta is the segment in between the myotomes (muscle segments) of a fish. It is the site where the myotomes attach, and is composed of collagen, which is the main connective tissue in fishes. The collagen is arranged in a grid-like formation which gives it the ability to get bent laterally but not longitudinally. This gives the fish the ability to move its body from side to side. Because the collagen is a fairly rigid substance, lateral bended collagen will tend to get unbent. This action is thought to lead to the fish having to spend less energy moving to the other side, because of the drag from the collagen.


Definition of bone?

Bone is a hard, dense connective tissue that makes up the skeletal system of vertebrates. It provides structure, support, and protection for the body, as well as serving as a site for blood cell production and mineral storage. Bones are made up of cells, collagen fibers, and mineral deposits such as calcium and phosphorus.


When is collagen laid down in an injury site?

Collagen is laid down during the proliferative phase of wound healing, typically starting around 3-5 days after the injury. At this stage, fibroblasts secrete collagen to rebuild the damaged tissue and provide structural support to the healing wound.