There are many ways in which substances can move across the cell membrane and in which then helps in the function of the body (cells‚ tissues and organs) overall. There are 3 processes that a substance can move across the membrane‚ theses are diffusion (simple and facilitated)‚ osmosis and active transport. Both diffusion and osmosis are passive processes‚ which mean they do not need energy to occur‚ whereas active transport does require energy. All three processes are involved in many functions
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build up complex molecules from simple molecules‚ these two processes are catabolic reaction and anabolic reaction respectively. Enzymes are needed in these two processes to catalyse releasing and taking up ATP molecules. Different sequence of amino acid produces different structure of protein‚ which determines the property of protein‚ thus each kind of enzymes has its unique active site‚ which only fits to complementary – shaped substrate to form product. Because of the feature of active site
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The Senses The sensory system involves hearing‚ touching‚ tasting‚ smelling‚ and seeing‚ which provide data for perception. The eye is a sensory organ held by an orbit that allows vision (a detection of light in a way that provides mental images of objects) and holds photoreceptors. Photoreceptors are used to absorb light energy‚ which are bent by a transparent unit called the lens. Some photoreceptors in the eye are the rod cell and cone cell. Rod cells are used in dim light for coarse images and
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Nervous System The nervous system is the part of an animal’s body that coordinates the voluntary and involuntary actions of the animal and transmits signals between different parts of its body. In most types of animals it consists of two main parts‚ the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord. The PNS consists mainly of nerves‚ which are long fibers that connect the CNS to every other part of the body. The PNS includes motor
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Title: Introduction to cell‚ tissues and organ Objectives: 1. To study the different type‚ function‚ structure and histology of cell‚ tissue‚ and organs in human body. 2. To learn how to identify different cell and tissue based on their structure and shape. 3. To learn how to use the microscope properly to observe the slide of different cell and tissue. Introduction: Cell is the basic structural and functional units of an organism that are composed of chemicals. Cell is the smallest living unit
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Cells and Movement of Substances All living things are formed by cells‚ the structure of these cells varying depending on their function. Animal and plant cells have common features such as a nucleus‚ cytoplasm and cell membrane. Dissolved substances pass into and out of cells by diffusion Diffusion Diffusion definition: Diffusion is the movement of molecules from a high concentration to a low concentration. Dissolved
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Earthworms are part of Phylum Annelida‚ Class Oligochaeta. They are classified in this phylum because their bodies are segmented and separated by an internal wall called septa. Each segment may or may not be different from the other depending on its function. Earthworms also classify with this phylum because it has a true coelom lined with a mesoderm and contain complex organ systems (Miller and Levine 694). Earthworms survive by feeding‚ circulating‚ respirating‚ excreting‚ reacting‚ moving‚ and
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believed. However‚ instead of letting our healthy organs be eaten by insects and decomposing it we can try to save a person in need. Based on donate life America‚ an organizational team who support and encourage people to sign up to be an organ donor and according to their information and research there are more than 117‚294 people of all ages and gender currently on the wait list for an organ transplant in United states concurrently. “The process of organ donation can save as many as eight lives through
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1.Organ donation takes healthy organs and tissues from one person for transplantation into another. Organs you can donate include: kidneys‚ heart‚ liver‚ pancreas‚ intestines‚ lungs‚ skin‚ bone‚ bone marrow‚ and cornea (the front part of the eye). [source: medlineplus.com] 2.Organ donations usually occur for patients with kidney failure‚ heart disease‚ lung disease‚ and cirrhosis of the liver. For patients who need a kidney or a liver‚ a living donor’s organs can be utilized‚ since we are already
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What is an Organ Broker? A poor man is desperate to make money to feed his family in an undeveloped country. A rich man is sick and needs a kidney transplant in order to survive. He is willing to pay whatever it takes to save his life. A greedy man acts as a middleman‚ or broker‚ between the two men and goes home with a profit of thousands of dollars. Organ brokers are most common for organizing kidney transplants and other non-essential organs. However‚ occasionally organ brokers will bribe
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