Sympathetic nervous system induces:

1. heartbeat

2. secretion of digestive juice

3. secretion of saliva

4. All of the above

Subtopic:  Regulation of Cardiac Activity |
 55%
From NCERT
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The blood group with antibody-a and antibody-b is:

1. B

2. A

3. O

4. AB

Subtopic:  Blood: Blood Group (A,B,O) |
 82%
From NCERT
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Rate of heartbeat is determined by:

1. Purkinje fibres

2. papillary muscles

3. SA-node

4. AV-node

Subtopic:  Human Heart: Cardiac Cycle |
 88%
From NCERT
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Match the Column I and Column II:

Column I Column II
(a) P-waves (i) Depolarisation of ventricles
(b) QRS complex (ii) Repolarisation of ventricles
(c) T-wave (iii) Coronary ischemia
(d) Reduction in the size of T-wave (iv) Depolarisation of atria
(v) Repolarisation of atria
Select the correct option:
Options: (a) (b) (c) (d)
1. (ii) (iii) (v) (iv)
2. (iv) (i) (ii) (iii)
3. (iv) (i) (ii) (v)
4. (ii) (i) (v) (iii)
Subtopic:  ECG & Coronary Artery Disease |
 76%
From NCERT
NEET - 2019
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What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

1. 125 beats per minute

2. 50 beats per minute

3. 75 beats per minute

4. 100 beats per minute

Subtopic:  Human Heart: Cardiac Cycle |
 60%
From NCERT
NEET - 2019
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Assertion: Right atrium and right ventricle of heart are known as pulmonary heart.

Reason: Both right atrium and ventricle pump the deoxygenated blood.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Human Heart: Double Circulation |
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Aging RBCs are phagocytized by macrophages in the mononuclear phagocyte system [sleen or liver] and their components are recycled, EXCEPT for the

1. iron atom from the heme group, which is excreted in bile

2. globin peptide chains, which are sent to the kidneys for excretion

3. globin peptide chains, which are converted into bilirubin

4. heme group (minus the iron atom), which is converted into a green pigment called biliverdin

Subtopic:  Blood: General Description & RBC: Part 1 | Blood: General Description & RBC |
 51%
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The normal pacemaker of the human heart, sinoatrial node, is derived from the more primitive:
1. ventricle

2. bundle of His

3. conus arteriosus

4. sinus venosus

Subtopic:  Human Heart: Gross Anatomy |
 56%
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Amongst the following, a molecule that would lead to coagulation of the blood would be:
1. prostacyclin
2. tissue factor or thromboplastin
3. plasmin
4. tissue plasminogen activator

Subtopic:  Blood: Blood Clotting |
 88%
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During a cardiac cycle:
1. About 70 ml of blood is pumped by the two ventricles
2. The left atrium and the left ventricle contract simultaneously
3. More blood is pumped into the systemic than in pulmonary circulation
4. The atria contract prior to the ventricles

Subtopic:  Human Heart: Cardiac Cycle |
 58%
From NCERT
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