THE CELL JBLE Flashcards
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most abundant protein in mammals?
collagens, 90% of the time its type I, 30% of body weight is collagen
this type of protein has great tensile strength, flexible but non-elastic
collagens
what produces collagen?
fibroblasts, mesenchyme, bone
what is this collagen type?
2 alpha 1
1 alpha 2
most ubiquitous, found in bones, tendons, healing more
Type I collagen
what is this collagen type?
3 alpha 2
made by chondroblasts in cartilage, fibers found in cartilage
Type II collagen
what is this collagen type?
3 alpha 3 chains
in reticular fibers
Type III collagen
what is this collagen type?
3 alpha 4 chains
in basal laminae
type IV
what is this collagen type?
structure unknown, fetal membranes
type V
what is this collagen type?
collagen is an interlinking collagen important for formation of basement membranes
type VII
this type of fiber is thin, primitive, a type III collagen
stains with silver
fragile and form fine support for delicate framework
first to appear embryonically for delicate and rapidly changeable stroma
reticular fibers
this type of fiber is long, thin, refractile, and yellow in fresh tissue, stretchable, no banding, stains with resorcin fuchsin and orcein
elastic fibers
T/F, cells of connective tissue can be fixed or wondering cells?
true
these types of CT cells are pluripotent and great in developing embryonic tissue?
undifferentiated mesenchymal cells
T/F, all connective tissue come from mesenchyme, not mesoderm
true
these types of CT cells are similar in appearance to mesenchyme cells and responsible for the production of collagenous, reticular, and elastic fibers and synthesis of GAGs, spindle shaped and fusiform
fibroblasts
fibroblasts or blastocysts are basophilic?
fibroblasts
what is unique about fibrocyte?
palely basophilic to eosinophilic and can revert back to active state like in wound healing
what is this CT cell?
wondering cells, irregularly shaped, ovoid or indented nucleus, has vacuole, capable of amoeboid movement, scavengers, and can form a giant body cell
macrophages
these CT cells are widely distributed in the CT, occur in small groups in relation to blood vessels, basophilic cytoplasmic granules that exhibit metachromasia, small, contain heparin, histamine, serotonin, releases ECF-A attracting eosinophils, NONPHAGOCYTIC, and regulate problems with blood pressure
mast cells
these are white blood cells that circulate the vascular system and can leave it to move into tissue for immune defense against pathogens, examples?
tissue leukocytes
lymphocytes and eosinophils
rare in dense ct, common along serous membranes and in lymphoid tissue and lamina propria
large lymphocytes with more basophilic cytoplasm
plasma cells
name this type of fat cell:
large and occur as a single mass, maybe clumps, spherical to polyhedral
derived from mesenchymal cells
stain with sudan dyes and sensitive to nutritional status
white adipocytes
name this type of fat cell:
present in late fetal and neonatal humans
small, cytoplasm, mitochondria, cytochromes
mutlilocular
brown adipocytes
what are the two embryonic CT?
mesenchyme
mucous