Cells, Exchange and Transport Cells (a) state the resolution and magnification that can be achieved by a light microscope, a transmission electron microscope and a scanning electron microscope; Resolution Magnification Light microscope 200nm x1,500 Transmission Electron Microscope 0.1nm x500,000 Scanning Electron Microscope 0.1nm X100,000 (b) explain the difference between magnification and resolution; Magnification is the degree to which the size of an image is larger than the image
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Bacteria are one of two types of Prokaryotic cells; the other being Archaea. The term “Prokaryotic” is Greek for “before nucleus”; therefore, bacteria are types of cells with no official nucleus. Cells with a nucleus came later on as life progressed, those being the Eukaryotes. Archaea and Bacteria are often confused together as they have very similar physical characteristics. They both have the same shape, size, and appearance, along with no membrane-bound organelles, but they have different ancestral
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should focus mainly on the lecture notes and the textbook as reference. 1. Define endocrine, paracrine and autocrine. 2. What are the two types of hormones? Which of the two are faster? Describe the mechanisms of how they work toward its target cell to produce a response. 3. What is ADH and oxytocin? Where is it produced? Where it is stored? What is considered the master gland of the body which controls various other glands/parts of the body with the hormones produced from this structure?
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Chapter 1 1. Cell is basic unit of life 2. Hierarchy of life figure 3. 3 Energy categories and examples of each Producer-plants and some microbes Consumer-humans and other animals Decomposer-fungi and other animals 4. Energy transfers are not 100% efficient – why? Cant capture all of the energy supplied by one source a. Where does all energy for biology come from? sun 5. Homeostasis- state of internal consistency or equilibrium 6. 2 types of reproduction asexual and sexual
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Human Cell Components Necleolus: The round granular structure within the nucleus of a cell, and composed of protein and RNA. Nucleolus is involved with ribosomal RNA synthesis and formation of ribosomes in cells. Nucleoplasm The nucleoplasm is a highly viscous liquid that surrounds the chromosomes and nucleoli. Many substances such as nucleotides (necessary for purposes such as the replication of DNA) and enzymes (which direct activities that take place in the nucleus) are dissolved in the
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the cell that contains the nucleic acids, protecting them by separating the genetic code from the cytoplasm, and keeps the cytoplasmic activity from interfering with any genetic material. Inside of the nucleus, proteins work together to copy parts of the deoxyribonucleic acids to the ribonucleic acids. This process of adding some of the DNA to the RNA is called transcription (Inside a Cell). The job of the nucleus is to coordinate all the activity of the cell, including growth, reproduction, protein
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process when a cell divides into 2 daughter cells that genetically identical to each other and to the parent cell. All cells come from preexisting cells by mitosis. Cell division involves a karyokinesis (division of the nucleus) and a cytokinesis (division of the cytoplasm). Mitosis produces the same number of chromosomes in each daughter cell as in the original nucleus which are inherited form a generation to another. It also causes a growth in the organism by increasing the number of cells. Not all
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The structure and functions of Cell The purpose of this report is to explain the structure and functions of Cell. Cell is the basic unit of life and it contains other membrane-bound organelles structures that carry out specific functions necessary for normal cellular operation. Organelles have a wide range of roles and functions that include everything from producing hormones and enzymes to providing energy for Cells. Organelles Location Structure Functions Nucleus Centre - Nucleus is spherical
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living tissue reproduction, bio-hybrid organ devices and microfluidics platforms have evolved from a concept of fantasy to a revolutionized reality. Available technology has migrated into the medical world, allowing scientists to develop several human organs utilizing microfluidics platform technology. Harvard University has developed a highly refined lung on-a-chip that embodies numerous forms of tissues. “We started with the simplest embodiment of human airway and capillary cells, and then introduced
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the molecular (smallest components of life) to the global (Earth) scale. Biology encompasses a large variety of life on earth. Uses of Biology in every day life: Molecular Biology – (Biology that deals with the smallest components of life such as cells, DNA, RNA) is used to solve crimes and reveal ancestry. Ecology- The scientific study of interactions among organisms and their environment is used to address environmental issues. Neuroscience- Field in biology that deals with brains; and Evolutionary
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