206 Quiz #3 Circle the correct answer (3pts each) 1. Which of the following is i

Question

206 Quiz #3 Circle the correct answer (3pts each) 1. Which of the following is incorrect about the functional properties of the heart? a. AV valves open when ventricular pressures are lower than atrial pressures b. It receives deoxygenated and oxygenated blood from veins entering the heart c. It distributes oxygenated blood to the systemic tissues via branches of aorta d. Its intercalated disk allows it to function as an effective pump e. The right side of the heart has less blood because it only distributes blood to the lung capillaries f. Both A and E 2. Which of the following formulas can be used to calculate SV? a. SV-EDV+ESV b. SV-EDV/ESV d. SV- EDV-ESV e. SV COHR f. Both C and D g. Both D and E 4. Which of the following pairs is mismatched? a. AV node-located at the base of the SVC b. P wave depolarization of SA node and contraction of the atria c. SA node pacemaker d. T wave = repolarization of ventricles e. Semilunar valves-prevents back flow into the ventricles 4. The corresponding mechanical events of P wave and the QRS complex areandrespectively? a. contractions of the atria; contractions of the ventricles and relaxation of atria b. depolarization of the atria and ventricles and repolarization of the ventricles c. contraction of the ventricles; polarization of the SA Node and repolarization of atria d. contraction of the AV node; relaxation of the SA node; polarization of the atria and ventricles e. depolarization of the ventricles; repolarization of the atria; repolarization of ventricles 5. All of the following are true about ECG, EXCEPT: 1. it represents the electrical events of the conduction system it provides information about the events of the cardiac cycle 3. 2. it measures amplitude and duration 4, the QRS complex represents ventricular contractions and relaxation a. 2 and 4 b. 4 only c. 1 and 3 d. 3 only e. 1 and 3 f. 2 only

Explanation / Answer

Ans 1:

The incorrect statement is :

(E) The right side of the heart has lesser volume of blood because it distributes blood only to lung capillaries.

This is incorrect because the volume of blood is same on both sides of heart.

Other statements are correct.

Ans 2:

SV=EDV-ESV

SV=CO/HR

(g) both D& E are correct.

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