Cardiac Cycle

Q. Blood pressure in the mammalian aorta is maximum during

1. systole of the left ventricle
2. diastole of the right ventricle
3. diastole of the right atrium
4. systole of the left atrium

Q.

Define a cardiac cycle and the cardiac output.

Q. Which of the following events does not take place during a ventricular systole
i. Due to the ventricular systole, ventricular pressure decreases.
ii. During the end of ventricular systole the semilunar valves open up.
iii. During the start of the ventricular systole the bicuspid and tricuspid valves close
iv. Due to the closure of the atrio-ventricular valves, dup sound is produced.

1. Event 1, 2 does not take place
2. All events take place
3. Event 2, 3 does not take place
4. Event 1, 4 does not take place

Q. Which of the following represents a correct sequence of events in a cardiac cycle?

1. Ventricular systole $\to$ atrial diastole $\to$joint diastole $\to$ ventricular diastole
2. Ventricular systole $\to$ atrial systole $\to$joint diastole $\to$ ventricular diastole
3. Joint diastole $\to$ ventricular systole $\to$ atrial systole $\to$ ventricular diastole
4. Joint diastole $\to$ atrial systole $\to$ ventricular systole $\to$ventricular diastole $\to$ joint diastole

Q.

Difference between cardiac output and stroke volume?

Q.

• Why gastero oesophageal sphincter is also known as cardic sphincter even though it has to do nothing with heart?

Q. Arrange the following events in the correct order.

I. Atrial systole
II. Ventricular diastole
III. Joint diastole
IV. Ventricular systole
V. Atrial diastole

1. II, III, I, IV, V
2. III, I, IV, V, II
3. I, II, III, IV, V
4. III, IV, I, V, II

Q. The vitamin whose content increases following the conversion of milk into curd by lactic acid bacteria is:

1. Vitamin-C
2. Vitamin-D
3. Vitamin-$B_{12}$
4. Vitamin-E

Q.

Which is the largest tissue in the human body?

Q. In the first phase of the cardiac cycle when both the atria are filled with blood, an action potential is generated by the SA node and then the atria contract. This is called as ________________.

1. atrial systole
2. atrial diastole
3. ventricular systole
4. ventricular diastole

Q.

In a healthy adult man, the normal diastolic pressure is __________mm Hg:

1. 80

2. 120

3. 90

4. 100

Q.

The pH of the human blood is 7.4. This implies

1. There are no ${\mathrm{H}}^{+}$ions in blood.

2. The concentration of ${\mathrm{H}}^{+}$ions in blood is more than the concentration of ${\mathrm{OH}}^{-}$ions.

3. The concentration of ${\mathrm{OH}}^{-}$ions in blood is slightly more than the concentration of ${\mathrm{H}}^{+}$ ions.

4. The concentration of ${\mathrm{OH}}^{-}$ions in blood is significantly more than the concentration of ${\mathrm{H}}^{+}$ ions.

Q.

The sequence of events which take place during one complete heart beat is known as

1. blood cycle

2. oxygen cycle

3. cardiac cycle

4. carbon cycle

Q. Explain cardiac cycle stepwise?

Q. During ventricular systole:

1. Oxygenated blood is pumped into the pulmonary artery and deoxygenated blood is pumped into the artery
2. Oxygenated blood is pumped into the aorta and deoxygenated blood is pumped into the pulmonary vein
3. Oxygenated blood is pumped into the pulmonary vein and deoxygenated blood is pumped into the pulmonary artery
4. Oxygenated blood is pumped into the aorta and deoxygenated blood is pumped into the pulmonary artery

Q.

Draw a diagram of smooth muscle fiber and label any three parts.

Q. The sympathetic nerves give _______ neural signals to heart and increases the _______.

Q.

Skeletal muscles contain dark bands which are anisotropic, and are called

1. A band

2. Z band

3. M line

4. I band

Q. If a person is losing blood continuously due to injury then what will be the effect on his pulse and BP initially?

1. Pulse will fall and BP will rise
2. Pulse and BP both will fall
3. Pulse will rise and BP will fall
4. Both pulse and BP will rise

Q.

In humans, blood passes from the ventricles to pulmonary artery and aorta due to

1. Increase in atrial pressure

2. Increase in ventricular pressure

3. Decrease in ventricular pressure

4. Suction pull

Q. (i) During a cardiac cycle each ventricle pumps out approximately $70$mL of blood which is called the stroke volume.
(ii) The cardiac output of an athlete will be much higher than that of an ordinary man.
(iii) The body has no the ability to alter the stroke volume and the cardiac output.
(iv) The cardiac output can be defined as the volume of blood pumped out by each ventricle per minute.
(v) Volume of blood pumped by left ventricle is higher than blood pumped by right ventricle.
How many statements are correct?

1. Three
2. Four
3. Five
4. Two

Q. Explain cardiac cycle with the help of diagrams.

Q.

The difference between systolic and diastolic pressure in humans is:

1. 40 mm Hg

2. 80 mm Hg

3. 120 mm Hg

4. 200 mm Hg

Q.

The cardiac cycle is the sequence of events that occurs when the heart beats. In the (i)______, the heart ventricles (ii)______ and fill the heart with blood. In the (iii)_______ the ventricles (iv)________and pump the blood to the body through the arteries.

1. (i) diastole phase, (ii) relax, (iii) systole phase, (iv) contract

2. (i) systole phase, (ii) contract, (iii) diastole phase, (iv) relax

3. (i) diastole phase, (ii) contract, (iii) systole phase, (iv) relax

4. (i) systole phase, (ii) relax, (iii) diastole phase, (iv) contract

Q.

Define a cardiac cycle and the cardiac output.

Q. In a standard ECG, QRS complex represents:

1. Depolarisation of ventricles
2. Repolarisation of ventricles
3. End of ventricular systole
4. Depolarisation of auricles

Q.

Identify the blood vessel 'D' in this diagram.

1. Superior vena cava

2. Pulmonary Trunk

3. Inferior vena cava

4. Aorta

Q.

Mitral Valve connects

1. Right atrium and right ventricle

2. Left atrium and left ventricle

3. Right atrium and left ventricle

4. Left atrium and right ventricle

Q. Find out the odd one.​

Cardiac muscle, smooth muscle, nerve cell, striated muscle. ​

Q. Short / Long answer type questions.
List the differences between a striated, smooth, and cardiac muscle fibre.