Question

In: Anatomy and Physiology

1.) The blood volume in left ventricle is the highest during end diastolic phase. True or...

1.) The blood volume in left ventricle is the highest during end diastolic phase.

True or False

2.) Arterial blood pressure is regulated by autonomic nervous system and kidneys.

True or False

3.) During diastole, intraventricular pressure rises as ventricles contract.

True or False

4.) T-wave of the electrocardiogram reflects ventricular repolarization.

True or False

Solutions

Expert Solution

1) True

Explanation :-

The blood volume in the left ventricle is highest at the end of diastole when blood from lungs is accumulated into the left ventricle.

2) True

Explanation :- Arterial blood pressure is under the control of sympathetic system and renin angiotensin system.

3) False

Correction :During diastole, intraventricular pressure decreases so that blood enters the ventricles.

4) True

Explanation :- ECG

Following waves are seen :

- P Wave : It is the small positive wave indicating atrial depolarizaton. It lead to atrial systole.

-QRS Complex : consists of three waves. Q wave which is small negative wave indicating septal depolarizaton. Large positive R wave indicating ventricular depolarizaton. And s wave.

This lead to ventricular contraction (systole).

- T Wave : It indicates ventricular Repolarization. This represents ventricular relaxation.

- PR interval: measure form start of P Wave to start of QRS complex.

It represents the time for the conduction of impulse from atria to ventricle.

- QT interval : measure from start of QRS to end T wave

-St segment : end of s wave to start of T Wave.

Sydney Mullin answered 6 months ago
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