Physiology Linder Unit 1 Possible Essay Questions Chapter 1 1. Describe the concept of homeostasis. Explain how negative feedback and positive feedback loops effect the homeostatic condition. Use examples to explain your answer. Homeostasis can be described as maintaining a relatively internal environment even though the external environment is variable. Negative feedback loops effect the homeostatic condition by controlling it by bringing you back to your set point
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Introduction - Basic Flip-Flop Circuit A flip-flop circuit can be constructed from two NAND gates or two NOR gates. These flip-flops are shown in Figure 2 and Figure 3. Each flip-flop has two outputs‚ Q and Q’‚ and two inputs‚ set and reset. This type of flip-flop is referred to as an SR flip-flop or SR latch. The flip-flop in Figure 2 has two useful states. When Q=1 and Q’=0‚ it is in the set state (or 1-state). When Q=0 and Q’=1‚ it is in the clear state (or 0-state). The outputs Q and Q’ are
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A Fast CRC Implementation on FPGA Using a Pipelined Architecture for the Polynomial Division Fabrice MONTEIRO‚ Abbas DANDACHE‚ Amine M’SIR‚Bernard LEPLEY LICM‚ University of Metz‚ SUPELEC‚ Rue Edouard Belin‚ 57078 Metz Cedex phone: +33(0)3875473 11‚ fax: +33(0)387547301‚ email: fabrice.monteiro@ieee.org ABSTRACT The CRC error detection is a very common function on telecommunication applications. The evolution towards increasing data rates requires more and more sofisticated implementations.
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endocrine functions Pancreas‚ gonads‚ placenta Other tissues and organs that produce hormones Adipose cells‚ thymus‚ and cells in walls of small intestine‚ stomach‚ kidneys‚ and heart Chemical Messengers Hormones: long-distance chemical signals; travel in blood or lymph Autocrines: chemicals that exert effects on same cells that secrete them Paracrines: locally acting chemicals that affect cells other than those that secrete them Autocrines and paracrines are local chemical messengers;
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2009 3rd International Conference on Power Electronics Systems and Applications PLC and Configuration Software Based Supervisory and Control System for Oil Tanks Area Xi CHEN1 Yanbo CHE1 K.W.E CHENG2 1 School of Electrical Engineering & Automation‚ Tianjin University‚ Tianjin China. E-mail: ybche@tju.edu.cn 2 Department of Electrical Engineering‚ The Hong Kong Polytechnic University‚ Hong Kong‚ E-mail: eeecheng@polyu.edu.hk Abstract - A supervisory and control system for oil tanks
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AP Biology Mid-Term Study Guide 2015 Monitha Patel Chemical Bonding Compounds Sharing of a pair of valence electrons by two or more different atoms Molecule Two or more atoms held together by covalent bonds Ionic Electron attraction between two atoms Cations (+1) and Anions (-1) attract Covalent Sharing of valance electrons between atoms Nonpolar Electrons are shared equally O2 Polar Covalent Unequal sharing of electrons between atoms Two hydrogen atoms are bonded to a single oxygen
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Study Guide for Quiz 1 What is gastrulation? What layers are formed during this process? The process in which a gastrula develops from a blastula by the inward migration of cells. Goes from one layer to three. Endoderm Mesoderm Ectoderm What is a chimera? a single organism that is composed of two or more different populations of genetically distinct cells that originate from different zygotes involved in sexual reproduction Understand the types of injuries/assaults an early embryo can
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is mainly of protein origin‚ although there is also a varied range of steroidal hormones. (ENDOCRINE SIGNALLING: Image from University of Kent https://moodle.kent.ac.uk/external/mod/book/view.php?id=2396&chapterid=78) Pick a representative signal molecule from the pathway you have chosen and indicate its function‚ the type of cell in which it is made and the specific manner in which it acts as a signalling molecule‚ including the receptor
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and therefore performs a key function in switching a cell from a resting state to a state of proliferation2. Mutations in Ras genes generate a hyperactive Ras protein that persists abnormally in its active state thereby transmitting an inappropriate signal for cell proliferation. The behavior of a proto-oncogene mutated into an oncogene can be studied in vitro by means of transfection. In such a transfection essay an oncogene introduced into a suitable tester cell line will drive the transfected cells
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We also see the effects of stress and depression on the ventral striatum‚ including the nucleus accumbens‚ the later playing a central role in the mechanisms of natural reward. Deep brain stimulation treatment of the nucleus accumbens seemed to be successful. Pittenger and Duman (2008) do note that study of plasticity in this pathway under conditions of stress and depression‚ while sparse‚ represents an important component of any comprehensive view of the relationship between stress‚ depression and
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