circulation of blood in the bodily tissues or to pump out the venous blood returned to it by the veins (Merriam-Webster). The heart is split into two distinct pumping structures‚ the right side of the heart and the left side of the heart. Appropriate cardiac performance involves each ventricle to extract even quantities of blood over intervals. If the volume of blood reimbursed to the heart develops more than both ventricles can manage‚ the heart can no longer be an efficient pump. Circumstances that
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not change in cardiac muscle cells (as with any other cells)‚ which is determined by the X amount of voltage needed for calcium channels to open. After this point‚ no additional voltage can cause the channels to open more‚ or again‚ prior to depolarization. 3. Why is it only possible to induce an extrasystole during relaxation. a. 3. cardiac is able to depolarize only after repolarization 4. explain why wave summation and tetanus are not possible in the cardiac muscle tissue
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Devices (Cardiac Monitoring‚ Diabetes Management Devices)‚ Health Apps (Exercise‚ Weight Loss‚ Women’s Health‚ Sleep and Meditation)‚ Medical Apps (Medical Reference) – Global Trends & Forecast to 2018 " analyzes and studies the major market drivers‚ restraints‚ and opportunities in North America‚ Europe‚ Asia‚ and Rest of the World. Browse 101 market data tables with 84 figures spread through 277 pages and in-depth TOC on "Mobile Health Apps & Solutions Market by Connected Devices (Cardiac Monitoring
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M34_MARI0000_00_SE_CH34.qxd 34 3/29/11 4:47 PM R E V I E W Page 218 S H E E T NAME ____________________________________ EXERCISE LAB TIME/DATE _______________________ Frog Cardiovascular Physiology Special Electrical Properties of Cardiac Muscle: Automaticity and Rhythmicity 1. Define the following terms. automaticity: Ability to depolarize spontaneously in the absence of external stimulation. rhythmicity: Depolarization/repolarization events occur in a regular and continuous manner. 2.
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Disposable Medical Devices Sensors Market - by Type (Biosensor‚ Image sensor‚ Accelerometer)‚ Monitoring (Smart Pill‚ Pulse Oximeter)‚ Diagnostic (Capsule Endoscope‚ Blood Glucose Strip)‚ Therapeutic (Insulin pump‚ Dialysis) - Global Forecast to 2018 Released On 7 th July 2014 The disposable medical devices sensors market showcases a lucrative growth potential with an estimated CAGR of 10.1% from 2013 to 2018. A number of factors such as the rising incidence of hospital acquired infections
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the heart wall. • Endocardium – inside layer of the heart wall‚ sheet of endothelium‚ lines the heart chambers and covers the fibrous skeleton of the valves • Myocadium – middle layer of heart wall‚ composed mainly of cardiac muscle‚ the layer that pumps • Epicardium – Viseral layer of the Serous Pericardium that lines the external heart surface 4. Describe the structure and functions of the four heart chambers. Name each chamber and provide the
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Chapter 14: Cardiovascular Physiology Cardiovascular Physiology Chapter 14 " Heart anatomy " Cardiac muscle cells " Autorhythmic cells " Cardiac cycle " Cardiac output " 1 Functions of Circulatory System " Transportation" – Respiration" Transport 02 and C02." – Nutrition" Absorbed digestion products delivered to liver and tissues" – Excretion" Carry metabolic wastes to kidneys" – Hormonal: " Carry hormones to target tissues" 2 The cardiovascular
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tissue in the human body. Endothelial cells form the endocardium which is the interior lining of blood vessels and cardiac valves. Over 50 percent of the cells the heart contains are cardiac fibroblasts. There are also pacemaker cells and Purkinje fibers that are specialized cardiomyocytes that generate and conduct electrical impulses. The sinoatrial node is composed of some of these pacemaker cells and rests in the right atrium generating impulses to initiate contraction of the heart. Between the atria
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the serous pericardium 1. Often infiltrated with fat‚ especially older people. 2. Myocardium (“muscle heart”) 2. Spiral bundles of cardiac muscle cells that form the bulk of the heart 3. Layer that contracts 4. Fibrous skeleton of the heart: crisscrossing‚ interlacing layer of connective tissue 1. Anchors cardiac muscle fibers 2. Supports great vessels and valves 1. Without support they might eventually become stretched because of the
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CARDIOVASCULAR Dsyrhythmias * Etiology * Disturbances in automaticity – initiation of impulse is altered * Disturbances in conduction – alteration in the speed the impulse travels * Reentry of impulses – cardiac tissue is depolarized multiple times by the same impulse * Speed‚ distance and location can be changed or affected (blockages cause change in heart rhythm) * Risk factors * Cardiovascular disease‚ MI * MI – death of tissue – no electricity
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