Question

At the end of the QRS complex, the lowest pressure in the cardiovascular system is in the

Select one:

a. Right Ventricle

b. Left ventricle

c. Right atrium

d. Left atrium

e. Superior and inferior vena cava

Imagine that a cell in the right ventricle became leaky so that sodium continually leaked into the cell. The cell reached threshold 115 times a minute. In this case,

Select one:

a. The heart would beat normally since the SA node and most cardiac tissue was not affected.

b. The heart would beat 115 times per minute. ECG and stroke volume would be normal.

c. The heart would beat 115 times per minute. The ECG would be normal, but stroke volume would drop.

d. The heart would beat 115 times per minute. The ECG would be abnormal, but stroke volume would be normal.

e. The heart would beat 115 times per minute with abnormal ECG and stroke volume.

Answer 1

Question no 1

Answer is option c

Yes at the end of qrs complex the ventricular depolarisation leads to the contraction of base of heart which increse the pressure on ventricle and reduce the pressure in atrium. When comparing atruns the right atrium is the one with less pressure.

Option a is wrong as right ventricle is having more pressure that right atrium at end of qrs complex

Option b is wrong as it has more Pressure than right atrium

Option d is wrong as it has more pressure than right atrium

Option e is wrong as it has more Pressure that right atrium

The most negative pressure will be in right atrium as diastole has started there at end of qrs complex