Dermis, Hypodermis, Connective tissue Flashcards
name the 3 most common ct cells
fibroblasts
adipocytes
mast cell
describe fibroblasts
secrete collagen and other elements of EC<
divide to make more
describe adipocytes
store fat
describe mast cells
macrophages and lymphocytes (cells with immune functions)
is the matrix only produced by fibroblasts
nNo
IT CAN BE PRODUCED BY RELATED cell types like chondroblasts in cartilage and osteoblasts in bone
are fibroblasts in all ct
HECK NO
describe ground substance of ct
depends on the type of connective tissue
describe fibers in ct
principal fiber type = collagen
can be others like elastic fibers
describe what collagen fibers do
confers tensile strength with flexibility
describe what elastic fibers do
confer resiliency
what is the most abundant protein in body
collagen
describe ground substance of ordinary ct
water stabilized by glycosaminoglycans, proteoglycans and glycoproteins
describe ground substance of bone
ground substance includes minerals
describe ground substance of blood
ground substance is fluid (plasma)
what is a sheath
fibroblasts - makes fibers and ecm
name and describe the components of amorphous ground substance
structural glycoproteins - 90% protein and 10% sugars
proteoglycans - 50/50 sugar proteins
GAGs
name the GAGs
chondroitin sulfate
dermatan sulfate
heparan sulfate
keratan sulfate
and core proteins (recall composition)
name a structural glycoprotein
fibronectin
name the collagen fibers found in ct and where they are found
type 1 - dermis, tendon
type 2 - hyaline cartilage
type 3 - reticular fiber
type 4 - BM
type 5 - fetal tissues
name the non collagen fibers found in ct and where they are found
elastin - elastic cartilage, arteries
gives elastic properties of cartilage
name the areas that collagen fibers are made in (like what they have to travel through)
nucleus
RER
golgi
extracellular space
describe what happens in nucleus (how collagen fibers are made)
2 copies alpha 1 gene
1 copy alpha 2 gene
forms 3 peptides which come out and goes to RER