integrating cells into tissues and organs

Question 1

structure and function of connective tissue

Answer 1

cells include mainly fibroblasts and adipocytes,. Have collagen, elastin and reticular fibre and this is all found in a ground substance which contains glycosaminoglycans such as hydroluronic acid 
functions include;
binding and supporting g
protecting 
insulation
separation of tissues

Question 2

structure and function of epithelial tissue

Answer 2

line all cavities and free surfaces of the body. epithelial are connected together to form barriers and rest on a bed of connective tissue which join them to other tissues

Question 3

how to epithelial cells adhere to each other and how all these adherence features work

Answer 3

draw out structure
tight junctions - prevent movement of molecules through epithelial tissue layer
adhesion junctions- stabilise structure and additional transport barrier
desmosomes - strongest link, holds filament of one cell and are connected to filaments of neighbouring cell
gap junction - allows passage of ions and small molecules between cells for communication

Question 4

how epithelial cells attach to basal lamina

Answer 4

attach the cell to basal surface
hemidesmosomes - anchors intermediate filaments to basal lamina
focal adhesions - anchors actin filaments to basal lamina

Question 5

when do cells first stick together

Answer 5

during embryogenesis

Question 6

what is the mucosal membrane and its functions

Answer 6

lines moist and hollow cavities. secrete mucous to provide thick protective fluid.
functions;
stop pathogens entering 
prevent body tissue dehydrating 
lubricate the surface

Question 7

3 examples of where the mucosal membrane is found

Answer 7

GI tract, urinary tract, respiratory tract

Question 8

describe structure of mucosa

Answer 8

mucosa(epithelial cells) then lamina propria, then submucosa which is a connective tissue layer and then muscular mucosae which is a thing smooth muscle layer.