When the heart is relaxed‚ it is also known as dystole. An ECG (electrocardiogram) is used to measure the rate and regularity of heartbeats‚ as well as the size and position of the chambers‚ the presence of any damage to the heart‚ and the effects of drugs or devices used to regulate the heart‚ such as a pacemaker. The first two ‘bumps’ in the ECG below show first the contraction of the atrium (P) (atrial systole) and secondly the contraction of the ventricles (QRS) (ventricular systole).
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Full Body Scanners in Airports A full body scanner that is a device that is able to detect objects hidden under clothing by constructing a full 3-D image of a person‚ complete with detailed body contours. There are presently two types of scanning technology that are used in full body scanners: millimeter wave scanners and backscatter scanners. A millimeter wave scanner is able to use radio waves that are of tremendously high frequencies‚ which are decoded in order to produce a 3-D image. A backscatter
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Study guide for Lecture Exam II Bio 202 (Heart‚ BV’s and Respiratory system) 1. The pulmonary circuit is supplied by which ‘side” of the heart? The systemic circuit? The right atrium 2. What is the functional difference between desmosomes and gap junctions? Desmosomes prevent adjacent cells from separating during contraction and gap junctions allow ions to pass from cell to cell transmitting current across the entire heart 3. What are the different effects of the PNS and SNS on heart rate?
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correct. 2. Which of the following is not an effect of sympathetic stimulation of the heart?(2.0 Score ) A.It increases the amount of calcium ion entering cardiac cells. B.It decreases the duration of systole. C.It decreases the slope of the pacemaker potential. D.It increases heart rate. E.It increases the rate of cross-bridge cycling in ventricular cells. 3. Which of the following statements concerning the capillaries is false?(2.0 Score ) A.Velocity of blood flow is slower in the capillaries
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Cardiomyopathy: Causes‚ Treatments‚ & Prognosis General Biology BIOL1114R122S-2101 Benson‚ Gifty “Above all else‚ guard your heart‚ for it is the wellspring of life” (Proverbs 4:23‚ NIV). Although this is a proverb from the Bible and most likely not meant in a literal biological term‚ it is still fitting for everyday life. The heart is an absolute necessary part of human existence. The human heart is really quite simple when compared to other organs in the body. It is essentially
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Aquatic Adaptation Aquatic plants - also called hydrophytic plants orhydrophytes - are plants that have adapted to living in aquatic environments. -One of the main problems facing submerged aquatic plants is their inability to obtain oxygen. Unlike terrestrial plants‚ these plants cannot obtain the vital gas through their stomata because they are submerged in water. -Therefore‚ the stems‚ roots‚ and leaves of submerged aquatic plants posses aerenchyma cells‚ which supply oxygen to the rest of
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NUR 317 - Cardiac Exam Study Guide Define the following terms. Describe patient symptoms and conditions that could cause alterations in: Cardiac Output Volume of blood flowing through systemic or pulmonary circuit expressed in liters per min Normal= 5 L/min (resting adult) HRXSV= CO Factors: preload‚ afterload‚ myocardial contractility‚ heart rate As heart rate increases‚ this allows less time for diastole and the heart often cannot fill adequately. Therefore‚ a very rapid heart will often have
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Susan Summers‚ a 40-year-old casual worker‚ admitted to the hospital for laparoscopic right adrenalectomy. Mother of three children and she drink a bottle of wine every night. Susan is obese at 90 kg; her BMI is 36 kg/m2. She has a medical history of type 2 diabetes and she has a benign tumour on her right adrenal gland which caused by her Cushing’s syndrome. Firstly‚ according to a clinical study‚ Cushing’s syndrome is a chronic excessive exposure of glucocorticoids of the body’s tissues of the
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beats (heart rate). If you have heart block‚ the signals that regulate your heart rate are slowed or interrupted. The heart has two upper chambers (atria) and two lower chambers (ventricles). They work together to pump blood to the body. The heartbeat starts in an upper area of the right atrium (sinoatrial node‚ or SA node). This is the heart’s pacemaker. The SA node sends electrical signals that pass through another node (atrioventricular node‚ or AV node) until they branch out to supply both
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MegaCode Case Study Chamberlain College of Nursing Professor Amber Essman Critical Care (NR 340) July 11‚ 2013 MegaCode Case Study 1. Describe the preoperative and postoperative care of a client having PTCA/cardiac cath. What complications can occur post cardiac cath? The goal of PCI (percutaneous Transluminal intervention) is to open the blockage in the coronary artery. By opening the area that is blocked‚ it will help to reperfuse the myocardium. The faster this is done will help
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