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Q. No.Two heart sounds are normally produced during a cardiac cycle. The first of these is produced due to the:
1.
simultaneous opening of atrio-ventricular valves
2.
simultaneous opening of semilunar valves
3.
simultaneous closure of semilunar valves
4.
simultaneous closure of atrio-ventricular valves
Subtopic: Human Heart: Cardiac Cycle |
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From NCERT
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| COLUMN I | COLUMN II | ||
| A | Heart failure | P | The heart stops beating |
| B. | Cardiac arrest | Q | Heart not pumping blood, effectively enough, to meet the needs of the body |
| C. | Heart attack | R | Heart beats more slowly or with an abnormal rhythm |
| D. | Heart block | S | Heart muscle is suddenly damaged by an inadequate blood supply |
Codes:
| A | B | C | D | |
| 1. | Q | P | S | R |
| 2. | P | Q | S | R |
| 3. | P | Q | R | S |
| 4. | S | R | P | Q |
Subtopic: Atherosclerosis, Hypertension & Ventricular Fibrillation |
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During the coagulation of blood:
| 1. | Fibrinogen is activated by the enzyme plasmin |
| 2. | Prothrombin is activated by the enzyme fibrinolysin |
| 3. | The basophils release certain factors which activate the mechanism of coagulation |
| 4. | Calcium ions play a very important role |
Subtopic: Blood: Blood Clotting |
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From NCERT
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | The coagulum is formed of network of threads called thrombins. |
| Statement II: | Spleen is the graveyard of erythrocytes. |
In the light of the above statements, choose the most appropriate answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: Blood: Blood Clotting | Blood: General Description & RBC |
66%
From NCERT
NEET - 2022
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Which one of the following statements is correct?
| 1. | Increased ventricular pressure causes closing of the semilunar valves. |
| 2. | The atrio-ventricular node (AVN) generates an action potential to stimulate atrial contraction. |
| 3. | The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria. |
| 4. | Blood moves freely from atrium to the ventricle during joint diastole. |
Subtopic: Human Heart: Cardiac Cycle |
From NCERT
NEET - 2022
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Inadequate supply of oxygen to heart muscles leads to a symptom of acute chest pain. This disorder of the circulatory system is identified as:
1. Angina pectoris
2. Cardiac arrest
3. Heart failure
4. Coronary Heart Disease
Subtopic: DISORDERS OF CIRCULATORY SYSTEM |
85%
From NCERT
NEET - 2022
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Mark the correct match in the given graph of ECG.
1. P wave ® Completion of atrial systole
2. QRS wave ® completion of ventricular systole
3. QT – interval ® Completion of first heart sound
4. T wave ® End of atrial repolarisation
Subtopic: ECG & Coronary Artery Disease |
From NCERT
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A:
There is a slight time difference between atrial filling and the ejection of blood
from ventricle.
R: First of all SA node generate impulse for atria filling and after that impulse travel to purkinje fibers for ventricular contraction.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
R: First of all SA node generate impulse for atria filling and after that impulse travel to purkinje fibers for ventricular contraction.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Human Heart: Double Circulation |
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Which of the following would occur if an impulse from the SA node were blocked before it reaches the AV node?
1. The heart would not contract
2. Only the atria would contract
3. Only the ventricle would contract
4. Blood would travel only to the pulmonary system
1. The heart would not contract
2. Only the atria would contract
3. Only the ventricle would contract
4. Blood would travel only to the pulmonary system
Subtopic: Rhythmic Excitation of Human Heart: Part 1 | Rhythmic Excitation of Human Heart: Part 2 |
62%
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In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: In ECG by counting the number of QRS complexes, that occur in a given time period, one can determine the heart beat rate of an individual.
R: The QRS complex represents the depolarization of the ventricles which initiate the ventricular contraction.
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: In ECG by counting the number of QRS complexes, that occur in a given time period, one can determine the heart beat rate of an individual.
R: The QRS complex represents the depolarization of the ventricles which initiate the ventricular contraction.
Subtopic: ECG & Coronary Artery Disease |
66%
From NCERT
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