ECG Curve

Q.

Pulmonary semilunar valves are closed during __________ systole.

1. atrial

2. discontinuous

3. ventricular

4. continuous

Q.

Heart beats faster in small organisms compared to the larger ones.

1. False

2. Heart rate is independent of the size of the organisms.

3. Heart rate is independent of the surface area of the organisms.

4. True

Q.

Excuse me sir / madam do the superior vena cava have valves ?

Q.

Valves present at the aperture between the left auricle and left ventricle are called

1. tricuspid valve

2. bicuspid valve

3. mitral valve

4. semilunar valves

Q.

Which one, of the following blood vessels, has no muscles?

1. Artery

2. Capillary

3. Arterioles

4. Vein

Q.

Choose the correct statement.

1. The T-wave in an ECG represents excitation of ventricles.

2. The sum of P and T-waves in a given time period can determine the heartbeat of an individual.

3. The end of the P wave marks the end of systole.

4. The enlarged Q and R waves indicate myocardial infarction.

Q.

Bradycardia is

1. Fast heart rate

2. Slow heart rate

3. No heart rate

4. Normal heart rate

Q. Which chamber relaxes and pumps during the atrial systole, ventricular systole, atrial diastole and ventricular diastole? Explain in brief.

Q. Which of the following has the highest pulse rate?

1. Elephant
2. Whale
3. Coaltit
4. Human

Q.

Give the exact location of the following:

(i) Mitral valve

Q.

Which of these defects is not usually detected by ECG?

1. Arrhythmia

2. Myocardial infarction

3. Heart block

4. Valvular defects

Q. Make a list of the action words from this story.

Q.

In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

1. R – repolarization of ventricles

2. P – depolarization of the atria

3. T – end of diastole

4. S – start of systole

Q.

Pulmonary semilunar valves are closed during __________ systole.

1. atrial

2. discontinuous

3. ventricular

4. continuous

Q. The QRS complex in ECG represents

1. Depolarisation of ventricles
2. Depolarisation of atria
3. Repolarisation
4. Both a and b

Q.

Read the assertion and reason carefully to mark the correct option in question.

Assertion: $\text{ECG}$ is a graphical representation of the electrical activity of the heart during a cardiac cycle.

Reason: Each peak in the $\text{ECG}$ is identified with the letter from $P$ to $Q$

that indicates electrical activity of the heart.

1. If both assertion and reason are false.

2. If both assertion and reason are true but the reason is not the correct explanation of the assertion.

3. If assertion is true but the reason is false.

4. If both assertion and reason are true and the reason is the correct explanation of the assertion.

Q. what is the function of semilunar valve

Q. Blood vessels can

1. Expand
2. Contract
3. Both contract and expand
4. None of these

Q. Draw a diagram of the front view of human heart and label any six parts (including at least two) that are concerned with arterial blood supply to the heart muscles.