Lec 9/17

Question 1

what are 4 basic tissue types?

Answer 1

epithelial, CT, muscle, neural tissue

Question 2

where to find epithelial tissue?

Answer 2

cover surfaces, line cavities, line tubes

Question 3

what are functions of epithelial tissues?

Answer 3

protection(abrasion, chemicals, bacteria), reduction of friction, transcellular transport, secretion, absorption of nutrients, selective permeabilty, detection of sensations, excretion, forming glands. movement of mucus

Question 4

epithelium on skin, oral and nasal mucosae originates from what embryonic layer?

Answer 4

ectoderm

Question 5

epithelium lining of gut, respiratory tract, liver, pancreas originates from what embryonic layer?

Answer 5

endoderm

Question 6

epithelium lining of blood vessels and body cavities originates from what embryoinic layer?

Answer 6

mesoderm

Question 7

what is lining of blood vessels called?

Answer 7

endothelium

Question 8

what is lining of body cavities?

Answer 8

mesoderm

Question 9

what are 2 categories or epithelial tissues?

Answer 9

surface epithelia (sheet of cells covering internal or external surfaces), glands(structures that produce secretion secretions, originate from invaginated epithelial cell)

Question 10

what is surface epithelium composed of?

Answer 10

cellular layer and basement membrane (thin, noncellular layer consisting of basal lamina and lamina reticularis)

Question 11

lamina lucida

Answer 11

-basal lamina, houses transmembrane laminin receptors, integrin, dystroglycans, glycoproteins(laminin, entactin, per)