Cells and Organelles-Diversity of Cell type 3.0 / 5 based on 1 rating ? BiologyUniversityOther Created by: jessicaCreated on: 11-02-13 08:09 What are house keeping functions in cells? THe cellular functions of all cell types. 1 of 22 How are cells organized? into tissues.-epithelia, nervous tissue, connective tissue, muscle, blood. 2 of 22 What is differentiation? A process that produces different cell types. 3 of 22 How are embryotic stem cells directed? By growth factors that determine differentiation. 4 of 22 What type of stem cells are present in adults? Pluripotent stem cells. 5 of 22 What is apoptosis? Programmed cell death 6 of 22 What roles does apoptosis have? Roles in embryogenesis, tissue homeostasis, damage limitation, control and functioning of the immune system. 7 of 22 What are the two gene famillies involved in apoptosis? BCL2 and Caspase 8 of 22 What are the characterisitics of apoptosis? Very quick process, Cell is swallowed up by macrophages.Membrane forms blobs/bubbles by packaging the organelles up. 9 of 22 What protein sends out an eat me signal? Phosphodioserine on the surface sends out an eat me signal. 10 of 22 What is too little apoptosis associated with? cancer, autoimmune disease, prolonged viral infection 11 of 22 What is too much apoptosis associated with? neurodegenerative disorders, autoimmune disease, additional tissue damage and progession of AIDS. 12 of 22 What are the different types of epithelia cells? absorptive, ciliated, secretory 13 of 22 What are the four main classes of cell surface receptors? g protein coupled receptors, tyrosine-kinase linked receptors, ion channel receptors and receptors with intrinsic enzymatic activity. 14 of 22 What are the 3 stages in skeletal myogenesis? determination, proliferation, differentiation and cell fusion 15 of 22 What does MEF stand for? Muscle enhancing factor 16 of 22 What are totipotent stem cells? Stem cells that have the capability to produce every cell type in the body. 17 of 22 What are pluripotent stem cells? Stem cells that can generate embryonic tissues but not extra-embryonic tissues. 18 of 22 What are multipotent stem cells? Stem cells that can give rise to some types of differentiated cell. 19 of 22 What are the master transcription factors? Oct4, Sox2 and Nanog 20 of 22 What is Sox2 necessary for? multipotent neural stem cells. 21 of 22 What are the types of connective tissue? Collagens, glycosaminoglycan, proteoglycans, multiadhesive proteins and elastin 22 of 22
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