Changes in heart muscle
[DOC File]Unit Three Human Physiology
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Changes in heart rate and stroke volume during exercise are, in part, regulated by the autonomic nervous system. Parasympathetic activity to the heart decreases and sympathetic activity increases. In addition, circulating catecholamines such as epinephrine increase contractility of the myocardium and heart …
[DOC File]Cardiovascular System - Gavilan College
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Feed back mechanisms have evolved that maintain homeostasis. Examples in the human body include the changes in heart rate or respiratory rate in response to increased activity in muscle cells, and the maintenance of blood sugar levels by insulin from the pancreas. 8 …
[DOC File]Physiology
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When the heart muscle is weaker than normal, the body produces chemicals to help the heart pump more strongly. Over time, these chemicals can damage the heart muscle and cause it to get weaker. A beta blocker protects the heart muscle from harmful chemicals and may increase heart muscle …
Patient assessment - American Heart Association
Title: Heart: Pressure Changes & Exercise Answers Author: Jo Gilbert Last modified by: Jo Gilbert Created Date: 11/29/2003 10:42:00 PM Other titles
[DOC File]Heart: Pressure Changes & Exercise Answers
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Elasticity – muscle tissue can recoil to its original shape when the force stretching it is removed. There are 3 types of Muscle Tissue: Skeletal Muscle – attached to skeletal system (bones). Cardiac Muscle – found in the heart. Smooth Muscle – in walls of internal organs (e.g. stomach, small intestine) and in blood vessels. Table 1.
[DOC File]Summary of the Biochemical Events of Muscle Contraction:
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1. Heart sounds are due to vibrations in heart tissues as blood rapidly changes velocity within the heart. 2. Heart sounds can be described as a "lubb-dupp" sound. 3. The first sound (lubb) occurs as ventricles contract and A-V valves are closing. 4. The second sound (dupp) occurs as ventricles relax and aortic and pulmonary valves are closing.
[DOC File]THE HEART - Pennsylvania State University
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decrease in oxygen in heart stimulates local release of vasodilator from smooth muscle or endothelium. adenosine hypothesis. adenosine is a potent vasodilator and product of ATP hydrolysis. as ATP is broken down during muscle contraction in heart, adenosine diffuses across membrane and causes vasodilation. other possibilities. pO2. intracellular pH
[DOC File]Chapter 18 - Cardiovascular System: The Heart
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This is the series of changes that take place within the muscular pump of the heart as it fills with blood and empties. Marked by two heart sounds that follow each other in quick succession and are separated from the next doublet by a longer interval. During this interval the ventricles are contracted.
Hypertrophic Cardiomyopathy | Cleveland Clinic
2. systole – heart muscle contracting. diastole – heart muscle relaxing. 3. normal BP: 120 . 80 -range of normal: 110-140 . 75-80. 4. hypertension – high blood pressure – chronic: 140 and up . 90 and up 5. hypotension - low blood pressure: below 100 . below 60
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