discrepancies. Heart rhythms are measured in waves‚ complexes (spikes) and intervals (time lapses)‚ which are assigned the letters P-T. P is a wave representing atrial depolarization‚ which causes the atria to contract‚ in response to electrical impulses sent from the SA node. The PR interval shows the time from the start of atrial depolarization to the start of the ventricular depolarization which follows it‚ which comes after a slight delay in receiving the impulses through the AV node
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K+ ions rush out of the cell‚ and the net result is rapid repolarization that restores the resting potential. ATRIAL DIASTOLE/ VENTRICULAR SYSTOLE. During atrial repolarization‚ the ventricles are depolarizing (seen as the QRS on the EKG) because the impulse has passed the AV node‚ travelled along the septum within the bundle of His‚ down the bundle branches and Purkinje fibers. The
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Using the grouped sets of terms to the right of the diagram‚ correctly identify each trace‚ valve closings and openings‚ and each time period of the cardiac cycle. a c 1 2 b g 3 4 5 d 120 i f h Pressure (mm Hg) i 1. aortic pressure k 2. atrial pressure n 3. ECG o 4. first heart sound p 5. second heart sound g 6. ventricular pressure m 7. ventricular volume h 8. aortic semilunar valve closes f 9. aortic semilunar valve opens e 80 40 l j 0 k b‚ d 10. AV and semilunar
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Eddie Kaplan The use of tasers by the law enforcement agencies in general‚ and by police officers. This has become one of the most controversial issues in the area of criminal justice policy. This is because the issues are really straightforward and the issues at hand are serious. The use of taser should be permitted to extend that such use is necessary to police officers should have some understanding of the effects that using weapon is likely to have upon a suspect before using the weapon
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(a) Give generalized conclusions (in point form) according to your observation in (a). 1. systolic pressure increases when the degree of exercise increases Systolic pressure increases gradually from 115 mmHg at rest to 150 mmHg during severe exercise. When thr degree of exercise increases‚ the skeleton muscle needs more energy(ATP) for rapid contraction by carrying out aerobic respiration. The skeleton muscle required faster uptake of oxygen and removal of carbon dioxide. At the same time‚ skeleton
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Chapter 69: Nursing Management: Emergency‚ Terrorism‚ and Disaster Nursing Test Bank MULTIPLE CHOICE 1. During the primary assessment of a victim of a motor vehicle collision‚ the nurse determines that the patient is breathing and has an unobstructed airway. Which action should the nurse take next? a. Palpate extremities for bilateral pulses. b. Observe the patient’s respiratory effort. c. Check the patient’s level of consciousness. d. Examine the patient for any external bleeding. ANS: B Even
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Effect of Exercise on Heart Rate. Aim: The aim of this experiment is to find out how different intensities of exercise effect the heart rate I will measure it in beats per minute using a polar heart rate monitor. Hypothesis: I predict that as I increase the intensity of the exercise I do‚ that my heart rate will increase. This is because as I exercise more intensely I will need more blood to my muscles to supply oxygen and take away carbon dioxide; therefore my heart is going to have to beat
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pressure then returns to normal. Blood pressure can be lowered by the actions of artrial natriutretic peptide (ANP) hormone. Atrial natrriuretic hormones are a protein and a vasodilator‚ which is released by heart muscle cells. The hormone is involved in maintaining the homeostatic control of water and sodium a constant. Cells in the atrial chamber of the heart release Atrial natriuretic when the body senses high blood pressure. The hormone acts to lower blood pressure by reducing the water and sodium
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Print Form E X E R C I S E 6 Frog Cardiovascular Physiology O B J E C T I V E S 1. To list the properties of cardiac muscle as automaticity and rhythmicity‚ and to define each. 2. To explain the statement‚ “Cardiac muscle has an intrinsic ability to beat.” 3. To compare the relative length of the refractory period of cardiac muscle with that of skeletal muscle‚ and to explain why it is not possible to tetanize cardiac muscle. 4. To define extrasystole‚ and to explain
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The research report is divided into two different tasks interlinked with the Cardiovascular System. The first part is based on the conduction pathway of heart and its different stages. Whereas‚ the other task is based on a case study in regards of blood vessels‚ baroreceptors‚ kidneys‚ adrenal glands and heart rate that has affect the pulse and blood pressure of the patient. Task 1 Conduction Pathway of Heart and its stages Likewise central heating system with pipes‚ radiators‚ pumps and others
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