ANP 1105 Midterm: Anatomy midterm 1 notes

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Joanne Savory

Document Summary

Pp. 1 epithelial tissue: a sheet of cells that covers a body surface or lines a body cavity, forms boundaries between different environments. Functions: absorption, protection, secretion, filtration, excretion, sensory reception. Two forms occur in the body: covering and lining, forms the outer layer of the skin, lines cavities of digestive and respiratory, covers walls and organs, glandular, fashions the glands of the body. Five distinguishing characteristics: polarity, specialized contacts, supported by connective tissue, avascular but innervated, the ability to regenerate. All epithelia have a(n): apical surfa(cid:272)e: upper free surfa(cid:272)e that"s e(cid:454)posed to (cid:271)lood flo(cid:449, basal surface: lower fixed point. Basement membrane consist of: basal lamina (adjacent to the basal surface): non cellular, unsupportive sheet of primary glycoproteins (functions are to filter and support, two laminae. Epithelial cells fit closely together to form continuous sheets (tight junctions, desmosomes) Tight junctions- keep proteins in the apical region from diffusing into the basal region, which maintains polarity.