The structures labeled d are synaptic knobs. When an action potential reaches the knobs‚ they release neurotransmitters that carry the signal across the synapse. These neurotransmitters usually work by binding to receptor proteins in the membrane of the receiving neuron. This binding opens gates that allow sodium ions to enter the cell. 3. Name two ways in which the structure of a neuron is well adapted to perform the functions of the nervous system. A neuron’s structure is well adapted
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Scientific name (Momordica charantia) Ampalaya‚ also called bitter melon‚ is best known for its traditional use in treating diabetes. This plant also is used to treat psoriasis‚ intestinal worms‚ infections and other conditions. That’s because‚ in addition to its blood-sugar lowering action the plant has antibacterial properties‚ says "Ampalaya‚" author Frank Murray. Always check with a doctor before trying a new supplement for any purpose. FUNCTION Ampalaya is traditionally used in parts of
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the movement of osmosis through a selectively permeable membrane‚ in this case potato. Introduction: Osmosis is the movement of water through a semi permeable membrane‚ separating solutions of different concentrations. The water passes from a region of high concentration to a region of low concentration‚ until the two concentrations are equal in concentrations of water. Many cell membranes behave as semi permeable membranes‚ and osmosis is a vital mechanism in the transport of fluids
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Chapter 9: Muscular System: Histology and Physiology Multiple Choice 1. The capacity of a muscle cell to shorten forcefully is known as A) contractility. B) excitability. C) extensibility. D) elasticity. E) flexibility. Answer: a Level: 1 2. Muscles exhibit the property of excitability. This means that the muscle A) shortens its length. B) recoils to its original resting length. C) stretches beyond its normal length. D) responds to stimulation by the nervous system. E)
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jipmerJIPMER 2001 1)Vocalis Muscle is a part of a)Thyroarytenoid b)Cricoarytenoid c)Transverse arytenoid d)Posterior cricoarytenoid 2)Sumatriptan is contraindicated in a)Asthma b)DM c)Coronary artery disease d)peripheral vascular disease 3)Non granular fungal disease is a)Cryptococcus b)Blastomycosis c)Candida d) 4)All following are true of seminiferous tubules except a)Sertoli cells b)Leydig cells c)spermatid d)Spermatogonia 5)Sub-poena is a a)Legal b)medicolegal c)Medical
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Exercise 1: Cell Transport Mechanisms and Permeability: Activity 2: Simulated Facilitated Diffusion Lab Report Pre-lab Quiz Results You scored 75% by answering 3 out of 4 questions correctly. 1. Molecules need a carrier protein to help them move across a membrane because Your answer : c. they are too large. Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? You correctly answered: c. Movement is passive and down a concentration
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called the __(7)__‚ is the outermost layer of the heart wall‚ called the __(9)__‚ is composed of __(10)__; it forms the bulk of the heart. Connective tissue fibers that ramify throughout this layer construct the so-called __ (11)__ of the heart. The membrane that lines the heart and also forms the valve flaps is the __(12)__. This layer is continuous with the __ (13)__ linings of the blood vessels that enter and leave the heart. The heart has __ (14)__ chambers. Relative to the roles of these chambers
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(C-reactive Protein) * Primitive Pattern Recognition Receptors Antigen Ligand PAMPS** IgG (Fc) C3b CRP ** Pathogen Associated Molecular Patterns Armamentarium o Lysosomal Enzymes Lactoferrin – binds iron Defensins – permeabalize membranes Lysozyme – destroys bacterial wall Myeloperoxidase – catalyses reaction to form hypochlorite o Reactive Oxygen Intermediates (ROI’s) Hydroxyl Radical Hydroxyl Ion Superoxide anion Hydrogen peroxide (NADPH oxidase activation) o
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by firstly‚ defining the purpose of neurons in the body along with a description of the components within a neuron and how they enable information to be passed through the cell membrane and on to other neurons. Secondly‚ the resting potential of a neuron will be explored with relation to the concept of selective permeability and the purpose of the Sodium - Potassium pump. Thirdly‚ the molecular basis of the Action Potential will be explained including a description of hyper polarisation‚ depolarisation
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________________________ A C T I V I T Y 1 1 Cell Transport Mechanisms and Permeability Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. ______________________________________________________ __________________________________________________________________________________________________ 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? ______________
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