The Cell Lecture 4 0.0 / 5 ? Human BiologyLecture 4UniversityNone Created by: saraht83Created on: 29-04-16 10:56 What model describes the plasma membrane? fluid mosaic model 1 of 19 What do transmembrane proteins do? span the entire length of membrane 2 of 19 Are peripheral membrane proteins embedded? no 3 of 19 What is glycolipid? a carbohydrate-bound lipid 4 of 19 What do glycoproteins do? enable cells to be recognized by other cells/proteins 5 of 19 What do tight junctions do? link adjacent epithelial cells, restrict protein migration, prevent substances moving through intercellular space 6 of 19 What do desmosomes do? hold adjacent cells together, have dense plaques attached to cytoplasmic fibres and membrane cell adhesion proteins 7 of 19 What do gap junctions do? facilitate communication between cells, made up of connexons 8 of 19 What are connexons? span membranes of two adjacent cells, made of connexins 9 of 19 What do connexins do? snap together to generate a pore 10 of 19 What is diffusion rate determined by? temperature, size, charge and concentration gradient 11 of 19 What is active transport? requires energy expenditure 12 of 19 What kind of molecule undergoes primary active transport? cations 13 of 19 What is secondary active transport? uses established gradients and uses ATP indirectly 14 of 19 What is phagocytosis? cellular eating 15 of 19 What is pinocytosis? cellular drinking 16 of 19 What is exocytosis? materials secreted from cell 17 of 19 What is endocytosis? materials entering cell 18 of 19 What are thylakoid membranes involved in? conversion of light energy in photosynthesis 19 of 19
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