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The Transport of Substances Across the Plasma Membrane Essay
Structure and function of plasma membrane in cells, Sample of Essays
An infection is the invasion of an organism's body tissues by disease-causing agents , their multiplication, and the reaction of host tissues to the infectious agents and the toxins they produce. Infections can be caused by a wide range of pathogens, most prominently bacteria and viruses. Mammalian hosts react to infections with an innate response, often involving inflammation , followed by an adaptive response. Specific medications used to treat infections include antibiotics , antivirals , antifungals , antiprotozoals , and antihelminthics. Infectious diseases resulted in 9. Infections are caused by infectious agents pathogens including:. Symptomatic infections are apparent and clinical , whereas an infection that is active but does not produce noticeable symptoms may be called inapparent, silent, subclinical , or occult.
Structure and function of plasma membrane in cells
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration , can later be released to fuel the organism's metabolic activities. Most plants , algae , and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth. Although photosynthesis is performed differently by different species, the process always begins when energy from light is absorbed by proteins called reaction centers that contain green chlorophyll pigments. In plants, these proteins are held inside organelles called chloroplasts , which are most abundant in leaf cells, while in bacteria they are embedded in the plasma membrane.
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