The brain of an average human being contains 100 billion nerve cells or neurons. Billions more are found in other parts of the nervous system. Neurons come in all different sizes and shapes‚ but they all seem to be specialized to receive and transmit information. Neurons are made of neurons which contains chromosomes and genes‚ a cytoplasm which keeps the cells alive and a cell membrane that encloses the whole cell. Neurons are different from other cells because they have small fibers that branch
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Republic of the Philippines Mindanao State University General Santos City Bio 108: Cell Biology Laboratory Report August 28‚ 2013 DNA Extraction on Onion (Allium cepa) and Human Cheek Cell Arriza‚ Rolland Merch Buscato‚ Carl G. Butil‚ Conrad G. Leonida‚ Renee Theresa ABSTRACT This activity observes the DNA present in onion (Allium cepa) and human cheek cells by extracting it with the addition of lysis buffer and chilled ethanol. The lysis buffer is prepared from squeezed onion mixed
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Chapter 3: Cell Structure Notes The cell is the basic unit of biologic organization of the human body Protoplasm: an aqueous colloidal solution of carbohydrates‚ proteins‚ lipids‚ nucleic acids‚ and inorganic salts surrounded by a limiting cell membrane Cells in our respiratory tract produce mucus to trap dust and microorganisms that get past the hairs in our nose then move the material to our throat to be swallowed and passed out through the digestive system The most prominent structure in the
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[pic] Cells and Their Organelles The cell is the basic unit of life. The following is a glossary of animal cell terms. All cells are surrounded by a cell membrane. The cell membrane is semipermeable‚ allowing some substances to pass into the cell and blocking others. It is composed of a double layer of phospholipids and embedded proteins. Color and label the cell membrane tan. Plant cells have an additional layer surrounding them called the cell wall. The cell wall is made of nonliving
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1. You are looking at a Euglena using the x10 objective lens. You rotate the nosepiece around to x40 but the specimen is not visible. Describe what you should do next? Start by using the fine adjustment to attempt to focus on the Euglena. However‚ if it is still not visible‚ return to the x10 objective lens and use the fine adjustment to ensure the Euglena is as sharply focused as possible. Then‚ use the stage control to re-position the slide so the Euglena is directly in the centre of the lens.
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that performs a particular function‚ whereas an organ consists of groups of tissues that work together. Chapter Vocabulary Review 1. c 2. i 3. f 4. h 5. j 6. e 7. a 8. d 9. b 10. g 11. a 12. c 13. d 14. b 15. c 16. ribosome 17. rough endoplasmic reticulum 18. Golgi apparatus 19. Mitochondrion 20. chromosomes 21. diffusion 22. selective permeability 23. osmosis 24. facili-tated diffusion 25. active transport Enrichment 1. Morphogenesis
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proteins and DNA (Deoxyribose Nucleic Acid) o Chromosomes Condensed and highly coiled chromatin threads during cell division o Nucleoli A spherical structure that plays a part in the build up of proteins • Endoplasmic reticulum o A series of flattened sheets o Smooth endoplasmic reticulum Sites of synthesis and transport of steroids and lipids o Rough
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In the following essay I will be looking at both sides of the debate of whether neuroscience replaced psychology in explaining behavior. To begin with we must firstly understand what exactly neuroscience is and what it entails. It is generally defined as the study of how the nervous system develops‚ its structure and the functions it carries out. Neuroscientists study the brain and how it impacts on human beings behavior and cognitive functions. The study also looks at what occurs when things don’t
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CELLULAR FUNCTIONS Learning Outcomes: (a) Describe and interpret drawings and photographs of typical animal and plant cells as seen under the electron microscope‚ recognising the following membrane systems and organelles: rough and smooth endoplasmic reticulum‚ Golgi body‚ mitochondria‚ ribosomes‚ lysosomes‚ chloroplasts‚ cell surface membrane‚ nuclear envelope‚ centrioles‚ nucleus and nucleolus. (b) Outline the functions of the membrane systems and organelles listed in (a). (c) Describe the formation
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Despite the ability of cancer cells to rapidly divide in the absence of trophic factors‚ they still require some source of energy. It has been well established that cancer cells‚ like non-cancer cells‚ utilize glucose as a primary energy source. Not only do cancer cells utilize glucose‚ but they take up the molecule in large quantities. This was explained decades ago by Otto Warburg‚ resulting in what is now referred to as the Warburg Effect1. The Warburg Effect explains how cancer cells alter
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