F222 - 2.1.1.5 - stem cells 3.0 / 5 based on 1 rating ? Human BiologyCellular processes and structureASOCR Created by: hayley taylorCreated on: 25-11-12 15:11 does every cell in the body have exactly the same DNA? yes 1 of 20 why do different cells look different and perform different function? some of the genes that they contain are switched off 2 of 20 What is the technical term for the process of cells changing into different cells? differentiation 3 of 20 Once a call has differentiated can it produce more cells of a different kind? no 4 of 20 What is the technical term for cells which can divide and form different types of cells? undifferentiated cells; stem cells 5 of 20 Where do the most useful type of stem cells come from? embryo's which are a few day old 6 of 20 what is a newly fertilized egg said to be? totipotent 7 of 20 Why is a newly fertilized egg said to be totipotent? because it can form a whole new organism 8 of 20 What number of cells from an embryo is said to be pluripotent? 50 to 100 9 of 20 Why is an embryo of 50 to 100 cells said to be pluripotent? it has the ability to become any cell type but not a whole new organism 10 of 20 What can the stem cells in bone marrow become? any blood cells 11 of 20 stem cells found in bone marrow are called? heamocytoblasts 12 of 20 do stem cells use meiosis or mitosis? mitosis 13 of 20 What four stages are there for a stem cell to differentiate into a red blood cell? 1. heamoglobin builds up, 2. the nucleus breaks down, 3. cell organelle are lost, 4. cell decreases in size 14 of 20 What is an immature red blood cell called? reticulocyte 15 of 20 why is an immature red blood cell called a reticulocyte? as it had lots of rough endoplasmic reticulum 16 of 20 What is an immature monocyte called? monoblast 17 of 20 where does a monocyte develop into a macrophage? blood 18 of 20 where do lymphoblasts go to mature into lyphocytes? thymus gland 19 of 20 what is an immature leucocyte called? myeloblast 20 of 20
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