Which of the following will produce an increase in left ventricular contractility? a. An 8 in...
Which of the following will produce an increase in left ventricular contractility?
a. An 8 in left ventricular filling during diastole.
b. A increase in aortic blood pressure
c. A decrease in end-diastolic cell lengths
d. An increase in sympathetic nervous system activity
e. A decrease in extracellular Ca++ concentration
Homework Answers
Correct answer:- (b) A increase in aortic blood pressure.
Explanation :- blood from left ventricle is pumped in aorta, if
pressure in aorta will increase then there will be work load on
left ventricles.
Add Answer to:
Which of the following will produce an increase in left
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Which of the following will produce a decrease in left ventricular stroke volume if other factors remain unchanged (i.e. assume that compensatory mechanisms are not operative)? a. increased filling of the left ventricle during diastole b. increased aortic blood pressure c. Intravenous infusion of blood d. Injection of norepinephrine into the bloodstream e. increased right ventricular stroke volume
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The attached graph shows the time course of changes in left atrial pressure (LAP), left ventricular...
The attached graph shows the time course of changes in left atrial pressure (LAP), left ventricular pressure (LVP), and aortic pressure (AP) during the cardiac contraction cycle in a normal heart. The vertical dashed lines define four time periods, A through D. During which one of these time periods is blood ejected from the left ventricle into the aorta? A. time period A B. time period B time period D.time period D E. None of the above.
The attached graph shows the time course of changes in left atrial pressure (LAP), left ventricular...
The attached graph shows the time course of changes in left atrial pressure (LAP), left ventricular pressure (LVP), and aortic pressure (AP) during the cardiac contraction cycle in a normal heart. The vertical dashed lines define four time periods, A through D. During which one of these time periods is blood ejected from the left ventricle into the aorta? A. time period A B. time period B time period D.time period D E. None of the above.
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Which one of the following statements is true? A. All veins in the body contain partly...
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Aorta Pressure in left heart (mm Hg) Left ventricle Left atrium Left ventricular volume (ml) Ce 1000 euro in pushing Person o n Cummings .(2 a) Indicate on the graph where ventricular systole and diastole begin and end. (2) b) Indicate EDV and ESV on figure. Stroke Volume = c) Indicate on the graph where the left AV valve shuts and the aortic semilunar valve opens. (2) d) How would this figure differ if it depicted the right atrium and...
The attached graph shows the time course of changes in left atrial pressure (LAP), left ventricular pressure (LVP), and aortic pressure (AP) during the cardiac contraction cycle in a normal heart. The vertical dashed lines define four time periods, A through D. During which one of these time periods is blood ejected from the left ventricle into the aorta? A. time period A B. time period B time period D.time period D E. None of the above.
The attached graph shows the time course of changes in left atrial pressure (LAP), left ventricular pressure (LVP), and aortic pressure (AP) during the cardiac contraction cycle in a normal heart. The vertical dashed lines define four time periods, A through D. During which one of these time periods is blood ejected from the left ventricle into the aorta? A. time period A B. time period B time period D.time period D E. None of the above.
B. SHORT QUESTIONS Answer in the booklet provided. Ensure the correct numbering. A 2-lead electrocardiogram (ECG) trace below shows a progressive prolongation of PR interval (more than 0.2 sec) which result in a dropped QRS complex. PR PR PR PR 1. Which pathophysiological condition does the ECG trace above represent? 2. Br-adrenegic receptor blocker reduces blood pressure by inhibiting both the chronotrophic (affecting the heart rate) and inotropic (affecting contractility) effects on the heart however also decrease the release of...
Which one of the following statements is true? A. All veins in the body contain partly deoxygenated blood. B. Atrial systole and ventricular systole occur simultaneously. C. All types of blood vessels contain at least some smooth muscle in their walls. D. During ventricular diastole, blood pressure in the aorta is lower than blood pressure in the left ventricle. E. None of the above statements is true.
Which one of the following statements is true? A. All veins in the body contain partly deoxygenated blood. OB. Atrial systole and ventricular systole occur simultaneously. OC. All types of blood vessels contain at least some smooth muscle in their walls. OD. During ventricular diastole, blood pressure in the aorta is lower than blood pressure in the left ventricle. E. None of the above statements is true.
efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central Figure 2 nervous system. 19 form the Blood Brain Barrier 20._ are responsible for neurotransmitter release. 21 have ligand gated ion channels that are activated by neurotransmitters 22. Functionally, which cellular location is the neuron's "decision- making site" as to whether or not an action potential will be initiated? A axonal membrane B. axon hillock C. dendritic membrane D. presynaptic membrane 23. Calcium and...
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