Can anyone help me with these answers? Thank you. 1. An increase in Stroke volum

Question

Can anyone help me with these answers? Thank you.

1. An increase in Stroke volume is due to an increase in end diastolic volume and a decrease in end systolic volume.

True

False

2. Which set of chambers pump first?

a. Atria

b. Ventricles

3. Which wave is associated with the depolarization of the SA node and initiation of the atrial contraction?

P

QRS

T

4. Which component of the ECG coincides with the depolarization of the ventricles?

P-wave

QRS-Wave

T-Wave

T-P interval

5. Compare the at rest vs. after exercise intervals. Which time intervals are approximately constant? (check all that apply)

P-R

R-T

T-P

R-R

6. In the normal mammalian the pacemaker is located in the:

Brain

Atria

Atrioventricular (AV) node

Sinoatrial (SV) node

7. Which component of the ECG is most consistently associated with the lub sound?

P-Wave

QRS-Wave

T-Wave

8. In your best data which wave of the ECG is most consistently associated with the dup sound?

P-Wave

QRS-Wave

T-Wave

9. Would the efficiency of heart action be the same, less, or greater in a person whose heart made additional rumbles or hissess?

less

greater

same

True

False

Explanation / Answer

1. True

2. Atrium

3. P- wave

4. QRS wave

5.

6. Sinoatrial (SV) node,

7. QRS wave

8. T wave

9. Less

Because these noises are formed when contractions in heart increases.

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