Definitions of Analog multiplier on the Web: * In electronics‚ an analog multiplier is a device which takes two analog signals and produces an output which is their product. Such circuits can be used to implement related functions such as squares (apply same signal to both inputs)‚ and square roots. Definitions of Frequency doubling on the Web: * Second harmonic generation (SHG; also called frequency doubling) is a nonlinear optical process‚ in which photons interacting with a nonlinear
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CHEMICAL SIGNALS MAINTAIN HOMEOSTASIS Endocrine System: a system of glands that secrete hormones to regulate body function Hormones: chemical messengers or regulators • they are released by cells in one part of the body and affect cells in other parts of the body to speed up or slow down processes. Endocrine Hormones – are produced in glands and secreted directly into the blood and distributed by the circulatory system. Makes hormones and regulates the pituitary gland Pineal gland (makes serotonin
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biochemistry to disease etiology‚ diagnosis and treatment. Biochemistry II starts with a review of two areas crucial to normal‚ healthy cellular functioning. The structure and function of biological membranes‚ in particular the variety of cell signal transduction paradigms and the biochemistry of hormones. The structure‚ function and replication of the cell’s genetic material. This information is reviewed in a series of lectures on DNA‚ the genetic code‚ protein synthesis and aspects of molecular
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Psychology Sensation and Perception As we began the experiment‚ there was a tranquil and quiet environment. But as time passed disturbances and laughs were affecting how well I was able to distinguish the food and even the smells. According to the signal detection theory‚ the environment‚ our moods and attitudes play a great role in determining what we can or cannot distinguish. Although I was not able to detect some of the food and smells‚ I was able to distinguish most of them. I believe that being
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respond to changes via the excretion of specific chemicals known as hormones. The endocrine system is one of the body’s two major communication systems‚ the nervous system being the other. Communication within the nervous system is rapid‚ while the signals sent by the endocrine system may have much longer delays and last for much greater lengths of time. The endocrine system consists of all those glands termed endocrine glands‚ which secrete hormones. Hormones are chemical messengers that enter the
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and Medicine College of Physicians and Surgeons Columbia University New York‚ NY 10032 Cytokines and STAT Signaling 1. Introduction First discovered as the major signal transducer in interferon-mediated gene activation‚ STATs (signal transducers and activators of transcription) are now known to play a significant role in signal transduction for most cytokines. STATs represent a family of conserved proteins‚ seven of which have been identified in mammals (i.e.‚ Statl‚ 2‚ 3 ‚ 4 ‚ Say5b‚ and 6;
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or in the target cell’s nucleus Once a hormone is recognized by its target tissue or tissues‚ it can exert its biologic action by a process known as signal transduction PRINCIPLES OF ENDOCRINE FUNCTIION Chemical signalling can occur through endocrine‚ paracrine or autocrine pathways In classic endocrine signalling‚ a hormone carries a signal from a secretory gland across a large distance to a target tissue Hormones secreted into the extracellular space can also resulate nearby cells without
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00 Comparing The Red Room And The Signal Man I am going to write my essay on two very good short stories. The Red Room by H.G Wells and the Signal man by Charles Dickens. I am going to explain how the author progressively builds tension and suspense. The authors use different techniques such as the use of light‚ darkness and colour. The techniques that they use create moods and feelings towards the characters and rooms. The Signalman‚ is written in the first person‚ set in an old cutting
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Animal Physiology Friday January 13‚ 2012 What are Animals? Invertebrates No spinal column Vertebrates Spinal column Major Animal Phyla Porifera Cnidaria Platyhel-minths Mollusca Annileda Nematoda Arthro-poda Echino-dermata Chordata What is Animal Physiology? What is Physiology? “The study of how animals work” (function) Knut Schmidt-Nielsen (1915–2007) – came up with the whole scheme of animal physiology from cell to whole organism temperature
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MDIS Foundation Certificate in Biomedical Sciences Name : Student ID/NRIC/FIN: Batch : Lab Group : Date : 27th July 2012 |Total Marks Scored | | ‘Father of Chemotherapy’ Chemotherapy is the use of chemical matters to cure diseases (1). The origins of chemotherapy is attributed to Paul Erhlich‚ a Nobel Laureate in Medicine (1814-1915)‚ who is recognized as the ‘Father
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