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Q. No.A cardiovascular centre that can moderate the cardiac function through the autonomic neural system is located in the:
1.
Pons varoli
2.
Medulla oblongata
3.
Hypothalamus
4.
Cerebrum
Subtopic: Regulation of Cardiac Activity |
88%
From NCERT
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The cell shown in the given diagram:
| 1. | is a bone marrow stem cells committed to produce RBCs |
| 2. | is the megakaryocyte |
| 3. | is the commonest WBC and is phagocytic |
| 4. | is responsible for acquired immunity in humans |
Subtopic: Blood: White Blood Cells |
82%
From NCERT
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Consider the given two statements:
| I: | SA node is the natural pacemaker of the human heart. |
| II: | SA node is the only part of that nodal musculature that is auto-excitable. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Human Heart: Gross Anatomy |
56%
From NCERT
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An increase in the ventricular pressure during ventricular systole leads first to:
1. closure of tricuspid and bicuspid valves
2. opening of aortic and pulmonic semilunar valves
3. opening of tricuspid and bicuspid valves
4. Closure of aortic and pulmonic semilunar valves
1. closure of tricuspid and bicuspid valves
2. opening of aortic and pulmonic semilunar valves
3. opening of tricuspid and bicuspid valves
4. Closure of aortic and pulmonic semilunar valves
Subtopic: Human Heart: Cardiac Cycle |
73%
From NCERT
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Consider the given two statements:
| I: | The type of antigen present on the RBCs of a person with blood group type A is A |
| II: | The type of antibodies present in the plasma of a person with blood group type A is anti-A |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Blood: Blood Group (A,B,O) |
77%
From NCERT
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Cardiac output can be increased by:
| I: | Neural signals through sympathetic nerves |
| II: | Neural signals through parasympathetic nerves |
| III: | Adrenal medullary hormones |
| 1. | Only I and II |
| 2. | Only I and III |
| 3. | Only II and III |
| 4. | I, II and III |
Subtopic: Regulation of Cardiac Activity |
83%
From NCERT
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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 |
80%
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 |
79%
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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 |
88%
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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