Chapter 5: Skeletal FIBROUS joints form soft spots on a baby’s head. The nose is formed mostly of bone. – FALSE (cartilage) An immature bone cell found growing bone – OSTEOBLAST. An epiphyseal plate of cartilage forms at either end of a long and is the future growth plate may grow longer. –TRUE The Tibia of the lower leg forms the “shin bone”. –TRUE Ligaments connect the bone to bone at places called joints. –TRUE The lungs and heart are protected by the ribs‚ sternum‚ and
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not when they are first visible); a description of the differences between what happens to HC and SC during mitosis and meiosis I and meiosis II (please do not diagram out each stage‚ just describe the 2-3 key differences between the events of mitosis and meiosis I & II that explain the different outcomes); and an explanation of how these differences relate to the different functions of mitosis and meiosis in the organism. A chromatin is DNA combined with proteins that is found in the nucleus of eukaryotic
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Topic 2: Cells 2.1 Cell Theory 2.1.1: Outline cell theory Living organisms are composed of cells Cells are the smallest unit of life Cells come from pre-existing cells 2.1.2: Discuss the evidence for cell theory Humans have not been able to find any living thing that is not made up of at least one cell Robert Hooke first described cells when looking at cork through a microscope Louis Pasteur´s experiments: he discovered that all cells must come fom pre-existing cells 2.1.3: State that
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Student Exploration: Cell Division Vocabulary: cell division‚ centriole‚ centromere‚ chromatid‚ chromatin‚ chromosome‚ cytokinesis‚ DNA‚ interphase‚ mitosis Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Cells reproduce by splitting in half‚ a process called cell division. What do cells need to do between divisions to make sure that they don’t just get smaller and smaller? The cell needs to go through a phase after cell division. 2. The genetic information of
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G2) * Cell will not proceed with mitosis if DNA replication is not complete * The way the cell senses this is not understood completely * This checkpoint involves signals that block the activation of M phase cyclin-cdk complex (MPF) by inhibiting the activity of cdc25 protein phosphatase. * Cells with mutations in this checkpoint pathway or cultured mammalian cells treated with caffeine will proceed through mitosis with unreplicated DNA. Spindle-attachment
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15. What specifies that amino acid sequence of a protein? 16. What is RNA? How are the 3 types different in function? 17. How are triplet codes‚ codons‚ and amino acids related? 18. What is the purpose of mitosis? 19. Briefly describe what happens in each phase of mitosis? 20. What is the purpose of meiosis? 21. Explain the relationship between gametes‚ zygote‚ blastocyst‚ embryo and fetus. 1. Connective Tissue gives shape to organs and holds them in place. Blood and
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Biology: * Chapter 1: The Cell * Cell Adhesion Molecules (C.A.M.’s) - proteins that allow cells to recognize each other and contribute to proper cell differentiation and development. * DNA→ Genes → Histones → Chromosomes (or Chromatids) * Nucleolus- synthesizes rRNA * Smooth E.R. - lipid synthesis and detox of drugs and poison * Rough E.R. – Production of proteins products * Golgi Apparatus - series of membrane bound sacs; receives materials from smooth E.R. and sends
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Cells are considered the basic units of life in part because they come in discrete and easily recognizable packages. That’s because all cells are surrounded by a structure called the cell membrane. The cell is the very smallest unit of living matter. All living things including plants and animals are made up of cells. Cells are made of atoms‚ which are the smallest units of matter. There are many different kinds of cells. The two kinds you are most likely to be familiar with are animal and plant
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2.7.- COMPARACION ENTRE LAS CELULAS Recuerda que las celulas procarionticas son celulas primitovas que no tienen organelos rodeados por membranas. Su material nuclear se encuentra flotando en el citoplasma. Las bacterias se clasifican como procariontas. Las celulas eucariontas son las mas avanzadas y contienen organelos rodeados por membranas. Su material nuclear esta rodeado por una membrane nuclear. Las celulas de las plantas‚ los hongos y los animals son eucarionticas. Las celulas de las plantas
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uses the presence of 4 morphologic criteria to assign a grade: 1. nuclear atypia 2. mitosis 3. endothelial proliferation-’piled-up’ endothelial cells. NOT hypervascularity 4. necrosis The grade then depends on accumulation of these criteria as follows: * grade 1 - 0 criteria * grade 2 - 1 criterion (usually nuclear atypia) * grade 3 - 2 criteria (usually nuclear atypia and mitosis) * grade 4 - 3 or 4 criteria source: http://radiopaedia.org/articles/st-anne-mayo-astrocytoma-grading-system
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