ROD CELLS Rod cells‚ or rods‚ are photoreceptor cells in the retina of the eye that can function in less intense light than the other type of visual photoreceptor‚ cone cells. Rods are concentrated at the outer edges of the retina and are used in peripheral vision. On average‚ there are approximately 125 million rod cells in the human retina.[1] More sensitive than cone cells‚ rod cells are almost entirely responsible for night vision. STRUCTURE AND FUNCTION Rods are a little longer and leaner
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Chris Berntsen Types of Power After watching the tutorials on power‚ I have found that there are more types of power then I thought of previously. Some of these seem to be effective‚ while others seem to be less effective. The ones that I find to be the most effective are Referent and Expert. There is much benefit in a hard working approach to power‚ such as with the referent form of power. You ensure that thing get done in an easy and fair manner. Also with the expert form of power‚ you ensure
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THE TYPES OF WARS Introduction 1. War has numerous forms‚ faces‚ and shades. In today’s political environment‚ it is difficult to say‚ precisely‚ where peace ends and war begins. Classification of wars is discussed in the following paragraphs. Classification of Wars 2. Coercion. It is the Active use of force in a measured way or threat of force to persuade an adversary to adopt a certain pattern of behaviour against his wishes. US air attack on Col Qaddafi’s residence in 1986 and American
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Types of Friends Friends. They are the quintessential need for a human being. We do not live in this world on our own. Sometimes we feel lonely‚ helpless‚ abandoned‚ and even suicidal in some cases. In these kind of moments‚ friends come along as a balm‚ to help us out‚ to get us back up on the track because that is what friends are for. In life‚ we come across many people and that is one of the processes of making friends. However‚ friend is just a general term. There are different types of friends
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Melanoma What is Melanoma? Melanoma is the most dangerous type of skin cancer. This cancerous growth begins its development when unrepaired DNA skin cells. Unrepaired cells are damaged by ultraviolet radiation from sunshine or tanning beds which triggers defects that lead the skin cells to multiply rapidly and form malignant tumors. Tumors originate in the pigment-producing melanocytes in the basal layer of the epidermis. Melanomas often resemble moles which are black or brown‚ but they can also
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instrument‚ and it can play most popular types of music from classical to jazz‚ pop‚ or blues. People play the piano as a leisure activity. It is not too much to say that more and more people want to learn to play the piano than any other instrument. There have been many types of pianos throughout their history of development. However‚ pianos can be classified into three main types‚ grand pianos‚ upright pianos‚ and digital pianos; we can distinguish the types of the pianos through their designs and
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Classification Final Draft Types of Friends When I was a child‚ my parents raised me and my siblings to appreciate various kinds of friends. There are three types of friends I know of in this lifetime. I classify them according to how well they know me. We make friends or encounter them as we go every day. My first type of friends are called “pest friend”. They are my acquaintance‚ or in other words I only know them by their name. I may not remember what they might look like if I go away
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Types of Tissues Stacy Sisler HS 120‚ Section 03 Unit 2 Seminar Kaplan University Jan. 17‚ 2011 Types of Tissue A tissue is a group of cells that have a similar shape and function. Different type of tissues can be found in different organs. In humans‚ there re four basic types of tissue: epithelial tissue‚ connective tissue‚ muscular tissue‚ and nervous tissue. There may be various sub-tissues within each of the primary tissues. Epithelial tissue covers the body
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the knee and elbow. Hinge joint can only perform two types of movement – flexion and extension. When analysing a jump shot we need to get into a set position where our elbow and knees are flexed it is a hinge joint that allows us to do this. When we shoot we go from flexion into an extended position. Again‚ it is the hinge joint in the knee and elbows that allows us to do this movement Synovial joint 2 A ball and socket joint is another type of synovial joint. They can be found in the shoulder
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TYPES OF PACEMAKERS The classification of pacemakers into different types is based on the mode of application of the stimulating pulses to the heart. EXTERNAL PACEMAKERS: These are used when the heart block presents itself as an emergency and when it is expected to be present for a short time i.e during critical post operative periods and in patients during cardiac surgery‚ involving the valves or septum. * The pacemaker is placed outside the body. It may be in the form of wrist watch or in
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