HomeCoursesMEDSCI 201: Human Structure and FunctionLecture 17 Lecture 17 0% Question 1 of 31 What does it mean to say epithelial cells are ‘polarised’?= Permeability and structure differences between apical and basolateral membranes What does it mean to say epithelial cells are ‘polarised’?= Permeability and structure differences between apical and basolateral membranes Question 1 of 31Question 2 of 31 What proteins form the apical junctional complex? (4)= Zonula occudins (tight junctions), zonula adherins (adherins junctions), gap junctions, macula adherins (desmosomes) What proteins form the apical junctional complex? (4)= Zonula occudins (tight junctions), zonula adherins (adherins junctions), gap junctions, macula adherins (desmosomes) Question 2 of 31Question 3 of 31 What do zona occludans interact with?= Actin proteins in the cytoskeleton What do zona occludans interact with?= Actin proteins in the cytoskeleton Question 3 of 31Question 4 of 31 What do zona adherins (intermediate/adherens junctions) bind to?= Cadherins bind adjacent cell membranes, catenin binds actin terminal web What do zona adherins (intermediate/adherens junctions) bind to?= Cadherins bind adjacent cell membranes, catenin binds actin terminal web Question 4 of 31Question 5 of 31 What filaments do desmosomes bind?= Intermediate filaments What filaments do desmosomes bind?= Intermediate filaments Question 5 of 31Question 6 of 31 Which proteins do gap junctions use?= Connexons (connexin proteins) Which proteins do gap junctions use?= Connexons (connexin proteins) Question 6 of 31Question 7 of 31 Which junctions form belts around the cells?= Cadherens/intermediate junctions Which junctions form belts around the cells?= Cadherens/intermediate junctions Question 7 of 31Question 8 of 31 Which juctions facilitate communication between cells?= Gap junctions Which juctions facilitate communication between cells?= Gap junctions Question 8 of 31Question 9 of 31 What are the regions of the basement membranes of epithelial cells? (2)= Basal lamina, basal reticular What are the regions of the basement membranes of epithelial cells? (2)= Basal lamina, basal reticular Question 9 of 31Question 10 of 31 What layers does the basal lamina divide into? (2)= Lamina lucida, lamina densa (basal lamina) What layers does the basal lamina divide into? (2)= Lamina lucida, lamina densa (basal lamina) Question 10 of 31Question 11 of 31 What is the lamina propria?= Loose irregular connective tissue What is the lamina propria?= Loose irregular connective tissue Question 11 of 31Question 12 of 31 What proteins are used by the reticula lamina? (2)= Collagen fibres, fibronectin What proteins are used by the reticula lamina? (2)= Collagen fibres, fibronectin Question 12 of 31Question 13 of 31 What are the proteins of the lamina lucida? (2)= Laminin, integrins (of hemidesmosomes) What are the proteins of the lamina lucida? (2)= Laminin, integrins (of hemidesmosomes) Question 13 of 31Question 14 of 31 What are the proteins of the lamina densa? (2)= Laminin, collagen IV What are the proteins of the lamina densa? (2)= Laminin, collagen IV Question 14 of 31Question 15 of 31 What adheres the lamina lucida to the epithelial cells?= Hemidesmosomes What adheres the lamina lucida to the epithelial cells?= Hemidesmosomes Question 15 of 31Question 16 of 31 What proteins do hemidesmosomes use?= Integrins What proteins do hemidesmosomes use?= Integrins Question 16 of 31Question 17 of 31 What do hemidesmosomes bind to?= Intermediate filaments What do hemidesmosomes bind to?= Intermediate filaments Question 17 of 31Question 18 of 31 What are some apical specialisations of epithelia? (3)= Microvilli, stereocilia, cilia What are some apical specialisations of epithelia? (3)= Microvilli, stereocilia, cilia Question 18 of 31Question 19 of 31 What is glycocalyx?= Thick layer containing digestive enzymes that covers intestinal microvilli What is glycocalyx?= Thick layer containing digestive enzymes that covers intestinal microvilli Question 19 of 31Question 20 of 31 What part of the actin skeleton is connected to microvilli?= Terminal web What part of the actin skeleton is connected to microvilli?= Terminal web Question 20 of 31Question 21 of 31 What occupies the internal space of cilia?= Contractile cytoskeleton What occupies the internal space of cilia?= Contractile cytoskeleton Question 21 of 31Question 22 of 31 What occupies the internal space of the microvilli?= Actin filaments What occupies the internal space of the microvilli?= Actin filaments Question 22 of 31Question 23 of 31 What are the main functions for microvilli?= Increase apical surface area of epithelial cells to increase absorption/secretion What are the main functions for microvilli?= Increase apical surface area of epithelial cells to increase absorption/secretion Question 23 of 31Question 24 of 31 What are the main functions for cilia?= Movement of substances along the lumen of the cavity they line What are the main functions for cilia?= Movement of substances along the lumen of the cavity they line Question 24 of 31Question 25 of 31 What is the main function of stereocilia?= Increase absorption surface area in epididymus and vas deferens What is the main function of stereocilia?= Increase absorption surface area in epididymus and vas deferens Question 25 of 31Question 26 of 31 What are the types of glands? (2)= Exocrine, endocrine What are the types of glands? (2)= Exocrine, endocrine Question 26 of 31Question 27 of 31 What makes an exocrine gland different from an endocrine?= Exocrine excrete into ducts, endocrine excrete into blood What makes an exocrine gland different from an endocrine?= Exocrine excrete into ducts, endocrine excrete into blood Question 27 of 31Question 28 of 31 What are the types of simple epithelial glands? (5)= Tubular, coiled tubular, branched tubular, alveolar, branched alveolar What are the types of simple epithelial glands? (5)= Tubular, coiled tubular, branched tubular, alveolar, branched alveolar Question 28 of 31Question 29 of 31 What are the types of compound glands? (3)= Compound tubular, compound alveolar, compound tubuloalveolar What are the types of compound glands? (3)= Compound tubular, compound alveolar, compound tubuloalveolar Question 29 of 31Question 30 of 31 What are serous glands?= Exocrine glands that secrete watery substances What are serous glands?= Exocrine glands that secrete watery substances Question 30 of 31Question 31 of 31 What are the modes of secretion? (3)= Merocrine (vesicles), apocrine (cytoplasm excretion), holocrine (lysis) What are the modes of secretion? (3)= Merocrine (vesicles), apocrine (cytoplasm excretion), holocrine (lysis) Question 31 of 31 Loading...
