Plant cells are eukaryotic cells that differ in several key aspects from the cells of other eukaryotic organisms. Their distinctive features include: A large central vacuole‚ a water-filled volume enclosed by a membrane known as the tonoplast maintains the cell’s turgor‚ controls movement of molecules between the cytosol and sap‚ stores useful material and digests waste proteins and organelles. A cell wall composed of cellulose and hemicellulose‚ pectin and in many cases lignin‚ is secreted by
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A concussion‚ also known as a mild traumatic brain injury‚ results from a blow to the head (“NFL Head Injuries”). The concussion epidemic‚ an ever rising problem in sports today‚ has become very prominent‚ especially in the NFL. With the new research that has surfaced in the last couple years‚ the NFL has received grief for not doing enough about concussions and their risks after the fact. The NFL has not done enough on the topic of concussions considering the fact that the league still continues
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Phil Malvar Mr. Pires PAF30M 24 April 2014 Sport ’s Injuries: The Ankle Sprain Figure 1 Figure 2 Figure 3 Ankle sprain injuries are frequently caused by athletic activities that involve a rapid shifting movement when your foot is planted (figure 2). So what exactly is the ankle sprain? An ankle sprain happens when there is a stretching and tearing in an abnormal way of the ligaments surrounding the ankle joint. The
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mechanism of an ACL injury is that the loads applied to the ligament are greater than its ability to sustain the load. Increasing knee flexion has been found to reduce this load experienced by the ligament however‚ there is no single muscle crossing the knee that is capable of simultaneously supporting the knee from externally applied flexion‚ valgus‚ and internal rotation knee movements (Donnelly et al.‚ 2012). These movements‚ which are the main movements that result in an injury to the ACL‚ can be
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Chapter 6: A Tour of the Cell Cell fractionation – cells are taken apart using a centrifuge (differential centrifugation) and separated into their sub cellular structures Point of Difference | Eukaryotic | Prokaryotic | Shape/Size | Larger | Smaller | Complexity | Membrane bounded organelles | No membrane bound organelles | Nucleus | Bounded membrane with DNA | DNA in a region (nucleoid) | Kingdom | Plants‚ animals‚ fungi‚ protists | Bacteria and archaea | Reproduction | Sexual reproduction
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their function. In photosynthesis and aerobic cellular respiration energy is being produced to cycle carbon between the functions. There is the function of maintaining life‚ helping aid chemical reactions‚ using the cell to help aid reation. All of these recycling processes help creates energy that is then in return used to aid their specific function. The life processes of nutrition and respiration are related to photosynthesis and Aerobic Cellular Respiration. All organisms use material from the
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Anterior Cruciate Ligament Injury HPE 101 February 22‚ 2010 The anterior cruciate ligament‚ or ACL‚ is one of four major knee ligaments. The ACL is critical to knee stability‚ and people who injure their ACL often complain of symptoms of their knee giving-out from under them. Therefore‚ many patients who sustain an ACL tear opt to have surgical treatment of this injury. An ACL tear is most often a sports-related injury. ACL tears can also occur during rough play‚ mover vehicle collisions‚
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Animal Cell Cells are the beginning of everything. Every living thing is composed and made from cells. Cells are the smallest unit of organization that we know of. There are two major categories of cellular organization in eukaryotic cells. Those parts which are “membrane bound”‚ called organelles and those which are not “membrane bound”. Every aspect of the cell is important because each part or organelle’s structure is unique to its function. Non membrane bound organelles‚ are those which provide
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Cell Phones and Driving One of the most popular innovations in automotive travel in the past decade has nothing to do with the automobile itself‚ the people who drive them‚ or the roads over which they operate. Rather‚ it is the ability to carry on telephone conversations while driving. A major concern for the National Highway Transportation Safety Administration (NHTSA) is that drivers are being distracted by cell phone usage and about 85 percent of the nation ’s cell phone subscribers
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One of the worst things that can happen to a person as an athlete is getting an injury. This can destroy the motivation and emotions of the person that has poured there whole life into the sport just to have it stolen away from them in a brief instant. This mental and physical damage is what many athletes who get critical injuries feel once the damage has occurred. Even with strides in the medical field making injuries less permanent‚ the fact that we cannot perfectly heal the athletes causes a lot
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