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- I need the answer as soon as possibleSelect the correct answer for each question. Explain why you chose that answer as opposed to the others. In other words, explain why the other choices are incorrect. Select the correct statement about the function of myocardial cells. Cardiac muscle cells are innervated by sympathetic, parasympathetic, and somatic nerve fibers so that the nervous system can increase heart rate. The refractory period in skeletal muscle is much longer than that in cardiac muscle. The influx of potassium ions from extracellular sources is the initiating event in cardiac muscle contraction. The entire heart contracts as a unit or it does not contract at all.I need help with a respiratory question, thank you, I really appreciate it Stroke volume can be calculated using which formula? Group of answer choices End-diastolic volume – end-systolic volume Ejection fraction × heart rate Ejection fraction × end-systolic volume Cardiac output ÷ end-diastolic volume
- Match the following shunts with their location and function. Question 5 options: 123 this shunt carries oxygenated blood from the placenta away from the semifunctional liver towards the heart 123 this shunt connects the pulmonary artery with the aorta, further shunting blood away from the lungs 123 this shunt allows oxygenated blood in the right atrium to reach the left atrium, bypassing the lungs 1. ductus venosus 2. foramen ovale 3. ductus arteriosusA nurse caring for several patients in the cardiac unit is told that one is scheduled for implantation of an automatic internal cardioverter-defibrillator. Which of the following patients is most likely to have this procedure? A. A patient admitted for myocardial infarction without cardiac muscle damage. B. A postoperative coronary bypass patient, recovering on schedule. C. A patient with a history of ventricular tachycardia and syncopal episodes. D. A patient with a history of atrial tachycardia and fatigue.Postural tachycardia syndrome (POTS) is a form of orthostatic intolerance, the development of symptoms that come on when standing up from a reclining position, and that may be relieved by sitting or lying back down. The primary symptom of an orthostatic intolerance is lightheadedness, fainting and an uncomfortable, rapid increase in heartbeat (tachycardia), a common response to a rapid drop in blood pressure as mediated by baroreceptors in the carotid bulb and aortic arch. There are several inconstant secondary symptoms. A syndrome is simply a constellation of symptoms, not all of which may be present in all cases, and as is the case in POTS, a syndrome may also have a wide variety of underlying causes. A subset of POTS patients suffer from a low blood volume. Would you predict that this particular subset of patients has elevated or suppressed plasma levels of renin and aldosterone? Explain your answer. The nuance of dysregulation of the RAA axis is complex in these patients,…
- In what ways did the Framingham Heart Study contribute to the development of the US public health infrastructure? (Please be thorough in your response, no less than 160 words)Select the correct answer for each question. Explain why you chose that answer as opposed to the others. In other words, explain why the other choices are incorrect. If the vagal nerves to the heart were cut, the result would be that _____. The heart rate would increase by about 25 beats per minute. Parasympathetic stimulation would increase, causing a decrease in heart rate. The heart would stop, since the vagal nerves trigger the heart to contract. Pacemaker cells would cease to spontaneously depolarize.Riley has been a licensed taxi driver in TX for 21 years. When his physician Dr. Rob gave Riley his annual exam, Rob noted that Riley's heart was beating irregularly and there was a possibility of ventricular damage. This could lead to a heart attack. In Rob's opinion, the irregularities did not appear that serious, although they could worsen. Rob shared his concern with Riley. Riley, wanting to stay with his taxi company to receive the generous pension upon retirement, pleaded with Rob not to reveal this information to anyone. If you were Dr. Rob, what would you do? What are conflicting values and how should they be resolved? How is this similar or different from the Tarasoff case? Support your answer.
- Please answer fast a) Xena chases Callisto, the temperature inside her leg muscles starts to rise. Describe the effect of increased temperature on local autoregulatory control of blood flow in the affected leg muscles. b) Consider the venous return in Xena’s body and explain how it changes during exercise. Provide your rationale. c) Explain how the change of venous return you described in response to the previous question affects Xena’s cardiac output. Discuss your answer. d) Xena is a fit, young person. Compare the change of Xena’s heart rate during physical exercise to that of an unfit and older individual and justify your observation.Edema is caused by: Group of answer choices overproduction of cerebrospinal fluid infrequent urination which overfills the bladder increased protein concentration in blood capillaries drinking more water than can be absorbed more production of interstitial fluid than can be carried awayQUESTION 3 The atrioventricular valves are open when ventricular, arterial arterial, ventricular ventricular, atrial atrial, ventricular QUESTION 4 The semilunar (V-a) valves are closed when atrial, ventricular ventricular, atrial ventricular, arterial O arterial, ventricular pressure > pressure > pressure. pressure
