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Respiration in Organisms
Respiration in Organisms

... 10. The mountaineers carry oxygen with them becausea. At an altitude of more than 5 km there is no air. b. The amount of air available to a person is less than that available on the ground. c. The temperature of air is higher than that on the ground. d. The pressure of air is higher than that on th ...
Respiratory System
Respiratory System

... LUNGS – Paired and cone shaped; right lung- 3 lobes, left lung – two lobes; fill pleural divisions of the thoracic cavity; Pleural Membrane – a serous membrane that encloses and protects, Parietal Pleura – outer layer, Pleural Cavity- small space between membranes; Bronchiopulmonary segment to lobul ...
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ESUHSD Marking Period __2__: September 27th to October 5th
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... Use the fluid mosaic model to illustrate and explain the structure and function of the cell membrane. ...
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... Within multi-cellular organisms there is Division of labor. Division of labor - the work (labor) of keeping the organism alive is divided (division) among the different parts of the body. Each part has a job to do and as each part does its special job, it works in harmony with all the other parts. ...
Final Exam Review
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... Mary Stangler Center for Academic Success This review is meant to highlight basic concepts from the units covered in this course. It does not cover all concepts presented by your instructor. Refer back to your notes, unit objectives, labs, handouts, etc. to further prepare for your exam. ...
Final Exam Review
Final Exam Review

... Mary Stangler Center for Academic Success This review is meant to highlight basic concepts from the units covered in this course. It does not cover all concepts presented by your instructor. Refer back to your notes, unit objectives, labs, handouts, etc. to further prepare for your exam. ...
Responsible for the continuation of the plant species by sexual or
Responsible for the continuation of the plant species by sexual or

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Click here for printer-friendly sample test questions
Click here for printer-friendly sample test questions

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Introduction to the Animal Kingdom

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Chemical Composition of Living Cells
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Chapter 1 - The Science of Biology - holyoke
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... Occasionally you may have trouble with working your microscope. Here are some common problems and solutions. 1. Image is too dark! Adjust the diaphragm, make sure your light is on. 2. There's a spot in my viewing field, even when I move the slide the spot stays in the same place! Your lens is dirty. ...
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... Mitochondrial dysfunction, often characterized by massive fission and other morphological abnormalities, is a well-known risk factor for Alzheimer’s disease (AD). One causative mechanism underlying AD-associated mitochondrial dysfunction is thought to be amyloid beta (Aβ), yet the pathways between A ...
Biology Unit 2 - John Madejski Academy
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... Cancers (malignant tumours) result from uncontrolled cell division. Cells may invade neighbouring tissues, or break off and spread in blood forming secondary tumours. Benign tumours - growths of abnormal cells, contained in one area, usually within a membrane (do not spread). ...
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... division resumes, the cells that are produced are not all identical – they have differentiated and the mass of cells is referred to as an embryo. Initially, the embryo has three distinct layers: the ectoderm (outermost layer, which becomes nervous tissue and the outer epithelial tissue); the mesoder ...
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... the reaction happen faster- called catalysts • If you didn’t have enzymes, reactions would happen too slowly and you might die waiting for the rxn to occur. • Enzymes are used to break down food in your body and to build new molecules & organelles. • Enzymes are used over & over but are very SPECIFI ...
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... neuron before it B = Cell body – contains nucleus & cytoplasm C = Nucleus – genetic information D = Axon – transmits the message/impulse away from cell body E = Myelin sheath – protective covering that insulates the axon F = Node – gaps in the myelin sheath where the axon is exposed G = Schwann cell ...
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Unit 1 Cell Biology Topic 3: Producing new cells

... the new cells. Genes are the basic unit of inheritance, and are responsible for the characteristics of an organism (e.g. what it looks like, its behaviour and all its chemical reactions). Genes are located on chromosomes, which are threadlike structures found in the nucleus of most cells (remember r ...
NOTES- Inv. 2 Supporting Cells.notebook
NOTES- Inv. 2 Supporting Cells.notebook

... ­The human body is made of systems, which are made of organs, which are made of  tissues, which are made of cells ­All the human organ systems interact in order for a human to live and carry out life  functions.  The most important function is servicing cells. ­In a human, the circulatory system pum ...
Slide 1
Slide 1

... Active transport This is the movement of substances against a concentration gradient (from an area of low concentration to an area of high concentration. This process requires energy. This is provided by aerobic respiration which is carried out in mitochondria. Active transport often occurs across c ...
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Cell theory



In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction. With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1838. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. Cell theory has become the foundation of biology and is the most widely accepted explanation of the function of cells.The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the most basic unit of life. All cells arise from pre-existing, living cells, by biogenesis.
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