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Cardiac output....

Cardiac output.

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The amount of blood thrown out of the ventricles during one minute is called cardiac output. The amount of blood the heart pumps through the circulatory system in a minute
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Go through the following statements, (i) The stroke volume multiplied by heart rate gives the cardiac output. (ii) The second heart sound is associated with the closure of semilunar valves (iii) Heart failure is the same as cardiac arrest or a heart attack. Which of these are correct ?

P.Normal activities of the heart are regulated extrinsically i. e auto regulated by specialized muscles. Q. A special neural center in the medulla oblongata can moderate the cardiac function through the autonomic nervous function ( ANS) . R. Parasympathetic mental signals decrease the rate of heartbeat. S. Adrenal medullary hormones increase cardiac output. How many of the given statements are incorrect about the regulation of cardiac activities ?

Read the following statement (I - IV) I. The machine that is used to obtain ECG of a patient is called an electrocardiograph . II. The volume of blood pumped out by each ventricle per cardiac cycle is called the cardiac output . III. The second heart sound is associated with the opening of both semilunar values . IV. Hypertension is denoted by the ratio of systolic and diastolic pressure in mm of mercury pressure. How many statement (s) is/ are correct from the above ?

How many among the given statements are incorrect? a. All of the nodal tissue in human heart is capable of generating 70-75 action protentials in a minute. b. Lymph is devoid of all formed elements of blood. c. Cardiac output is defined as the volume of blood pumped by each ventricle in a cardiac cycle. d. Wall of left ventricle is thickest among all four chambers of human heart.

Read the following statements (A – D ) (A) QRS complex in ECG indicates ventricular depolarization. (B) The electrocardiograph machine is used to obtain Electrocardiogram a (ECG ) on graph paper . (C) During a cardiac cycle , the left ventricular pumps out about 70 ml is of Oxygenated blood which is called the cardiac output . (D) The second heart sound is associated with the closure of the semilunar valves . How many statements from the above is /are incorrect ?

How many values are correctly given from following? i. Normal heartbeet rate = 72 beats/min. ii. Period of cardiac cycle = 0.8 sec. iii. Stroke volume = 70 ml iv. Normal cardiac output = 5000 ml v. Normal blood pressure = 120/80 mm Hg

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