Please answer these questions with brief explanation Thank you in advance. Q1. W

Question

Please answer these questions with brief explanation

Thank you in advance.

Q1. Where on the graph (use the graph paper portion, not the images of the hearts) the P wave occurs?

Q2: Where on the graph (use the graph paper portion, not the images of the hearts) the first heart sound occurs?

Q3: Are there any increases in pressure (even small) in aortic pressure during isovolumetric ventricular relaxation? (Yes or No)

Q4: The purpose of early (isovolumetric) ventricular systole is to….

a. Allow the ventricles to fill with blood

b. Eject blood from the ventricles

c. Close the AV values

d. Open the SL valves

Left atrium Right atrium ight tricle Let ventricle (a) Passive filling during ventricular and atrial diastol (()Isovolumetric (d) Ventriculare)Isovolumetric (b) Atrial contraction ventricular contraction ejection ventricular relaxation

Explanation / Answer

Ans1. The P wave occurs during atrial depolarization and during upward deflection marking the begining of atrial contraction hence the correct option is option B

Ans 2. The first sound of the heart occurs in ventricular contraction hence the correct option is option C.

Ans 3. No there wont be an increase in pressure as the isovolumentric ventricular relaxation is characterised by the closure of the aorta.

Ans 4. The purpose of early (isovolumetric) ventricular systole is to C. Close the AV valves as the pressure in ventricles exceeds pressure of atria. Electrically it is the interval between QRS complex and T wave.

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