Cell Biology Lab - Homework # Due the week of Feb 3rd This is NOT a lab group project. Do the work individually. You may use any source other than your fellow students. Show your work‚ use your own words and cite all references. 1. (14 points) The HeLa S3 cancer cell line is considered to be “continuous” due to acquired mutations that enable the cells to evade senescence. This property is one of several hallmark characteristics of cancer cell lines. Describe three hallmark characteristics
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Cell Membrane The Cell Membrane- The cell membrane is a semi-permeable membrane that surrounds the cytoplasm of a cell; the cell membrane is made up of phospholipids‚ proteins and carbohydrates. Its function is to protect the integrity of the interior of the cell allowing certain substances into the cell‚ while keeping other substances out. The phospholipids form a thin‚ flexible sheet while the proteins float in the phospholipid sheet like an ice berg‚ and the carbohydrates extend out from the
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#2) Both Winner and Joy explore the issue of technology and control. How would you compare their two views of current technological development? Focus the comparison on a specific technology‚ such as genetically modified organisms. Technology is always in need of control. You cannot have a world that technology is in control such as the movie Terminator‚ where technology takes over. Just like human beings there is always a need for control. Both Winner and Joy explore this topic; Joy believes
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What are stem cells and what is gene therapy respectively? These are cells that have the potential to form many different types of cells found in the body. When stem cells divide‚ can form more stem cells or other cells that perform specialized functions. Embryonic stem cells have the potential to form a complete individual‚ while adult stem cells can only form certain types of specialized cells. Stem cells to continue to divide throughout the lifetime of a person. The use of recombinant DNA
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Animal Abuse 1. In some circuses‚ wild and exotic animals are trained through the use of intimidation and physical abuse. Former circus employees have reported seeing animals beaten‚ whipped‚ poked with sharp objects and even burned to force them to learn their routines! 2. Elephants who perform in circuses are often kept in chains for as long as 23 hours a day from the time they are babies. 3. More than 25 million vertebrate animals are used in testing in the United States each year. When invertebrate
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Animal experimentation Countless monkeys‚ dogs‚ rats and other animals are burned‚ blinded‚ cut open‚ poisoned‚ starved and drugged behind closed laboratory doors every year for convenience and economic reasons and because of old habits. Not only are animal tests extremely cruel‚ they are also completely inaccurate because of the vast physiological variations between species. Throughout the years of medical research‚ scientists have immorally exploited animals in the sense that they cannot decide
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EPIDERMAL CELLS INRODUCTION A living plant cell will shrinks or swells depending on the solute concentration of the cell in relation to the solute concentration of the fluid surrounding the cell (1). It follows that water will move from a region of high water concentration to a region of low water concentration therefore‚ if a cell is placed in a hypertonic solution water will move from the cell into the solution until the cell shrinks(1). Further water loss causes can cause the cells protoplasm
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CHAPTER 4 ANIMAL KINGDOM Animal Kingdom is characterized by multicellular‚ eukaryotic organisms. The cells lack cell walls. They ingest and digest food (holozoic)‚ hence they are heterotrophic. Higher forms show elaborate sensory and neuromotor systems. Majority of them are motile. Reproduction is mostly sexual and embryological development is present in them. About 1.2 million species of animals are described till now. The classification helps to assign a systematic position to newly described
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Right now‚ millions of mice‚ rabbits‚ primates‚ cats‚ dogs‚ and other animals are locked inside cages across the country waiting for the next painful and terrifying experiment to be performed on them. Before we conduct another experiment‚ we need to consider our treatment of others‚ both humans and non-humans. Animal testing is a form of animal cruelty that is no longer necessary or acceptable. There are many alternatives to animal testing that still ensure that the product is safe for humans. In addition
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Why is it okay to harm a defenseless‚ innocent‚ voiceless little animal? Because in a way it benefits us? When did that ever become okay? It’s not‚ and it never will be. Animal Testing is proof that humans will do anything to ensure their safety even though it means they have to hurt another. Poor defenseless animals fight for their lives every day to test out products they have no use for. These poor sweet creatures have been taken away their right to live to be caged and mistreated and they can’t
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