Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
what important structures are derived from the endoderm?
|
epithelium of respiratory, lower intestinal, and most inner membranes
|
|
what important structures are derived from mesoderm?
|
CT, skin dermis, skeletal muscle, urogenital, cardiovascular and lymph system
|
|
what important structures are derived from ectoderm?
|
epidermis, neural system,
|
|
what are the 3 components of connective tissue?
|
cells, fibers, and ground substance
|
|
what are the functions of connective tissue?
|
support, defense, CO2 and O2 exchange, and wound repair
|
|
what is an aponeurosis?
|
a flat tendon
|
|
where were most mobile CT just before they moved into CT?
|
blood
|
|
what are the two types of embryonic/pluripotent CT?
|
mesenchyme and mucous
|
|
what are the classifications for adult CT?
|
loose, dense (reg/irreg), reticular, adipose, specialized
|
|
what are the characteristics of mucous CT?
|
large amount of GS, stem cells found in matrix, cells appear similar to fibroblasts/mesenchymal cell
|
|
what are the characteristics of mesenchyme CT?
|
spindle shaped, few fibers, pluripotent for other CT cells
|
|
what is the difference b/t stroma and parenchyme?
|
stroma is CT of a gland, parenchyme is CT in a duct
|
|
what are the characteristics of fibroblasts?
|
spindle shaped, ovoid, large pale stained nucleus, basophilic cyto due to excess rER
|
|
what are the characteristics of fibrocytes?
|
smaller and thinner spindle shaped, smaller and darker nucleus
|
|
what is the function of myofibroblasts and how do they differ from fibroblasts?
|
they are used in wound contraction, and have added MF compared w/ fibroblasts
|
|
what gives rise to macrophages?
|
bone marrow stem cells--> monocytes-->macrophage
|
|
what are the characteristics of macrophages (histiocytes)?
|
large, debris from secondary lysosomes, heterogeneus cyto
|
|
what is the function of histiocytes (macrophages)?
|
ingestion & digestion of foreign bodies, cell-mediated resistance to bacteria, viruses, fungi, tumors
|
|
what are the characteristics of plasma cells?
|
ovoid or spherical shape, cartwheel nucleus, large golgi on one side w/ large amounts of basophilic cyto that side as well
|
|
what are the characteristics of mast cells?
|
granules, large oval, homogeneous cyto, central nucleus
|
|
what is the function of mast cells?
|
storage and release of chemical mediators of inflammation and hypersensitivity (allergic rxs, causes vasodilation and bronchoconstriction)
|
|
what is in the wall (to the inside of the endothelium) of a blood vessel?
|
CT and smooth muscle
|
|
what is the allergic rxn pathway?
|
AG (primary response)-->IgE produced-->IgE binds to mast cell-->AG (secondary response)-->antigen binds to IgE causing degranulation
|
|
what does histamine do?
|
contracts visceral arterial and bronchial smooth muscle and relaxes peripheral arterial smooth muscle
|
|
what are the characteristics of adipose cells?
|
contain a central droplet of fat in cyto, flattened nucleus in against membrane
|