How do parasympathetic neural signals affect the working of the heart?

1. Reduce both heart rate and cardiac output

2. heart rate is increased without affecting the cardiac output

3. Both heart rate and cardiac output increase

4. Heart rate decreases but cardiac output increases

Subtopic:  Regulation of Cardiac Activity |
 79%
From NCERT
NEET - 2014
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The diagram given here is the standard ECG of a normal person. the P-wave represents

the

 

1. contraction of both the atria

2. initiation of the ventricular contraction

3. beginning of the systole

4. end of systole

Subtopic:  ECG & Coronary Artery Disease |
 81%
From NCERT
NEET - 2013
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Arteries are best defined as the vessels which 

1. carry blood away from the heart to different organs

2. break up into capillaries which reunite to form a vein

3. carry blood from one visceral organ to another visceral organ

4. supply oxygenated blood to the different organs

Subtopic:  Human Heart: Double Circulation |
 71%
NEET - 2011
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Which one of the following statements is correct regarding blood pressure?

1. 100/55 mmHg is considered an ideal blood pressure

2. 105/50 mmHg makes one very active

3. 190/110 mmHg may harm vital organs like brain and kidney

4. 130/90 mmHg is considered high and requires treatment

Subtopic:  Atherosclerosis, Hypertension & Ventricular Fibrillation |
 72%
From NCERT
NEET - 2011
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A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid cetificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?

(1) Type AB

(2) Type O

(3) Type A

(4) Type B

Subtopic:  Blood: Blood Group (A,B,O) |
 95%
From NCERT
NEET - 2011
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'Bundle of His' is a part of which one of the following organs in humans?

1. Heart

2. Kidney

3. Pancreas

4. Brain

Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
 96%
From NCERT
NEET - 2011
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Examination of blood of a person suspected of having anaemia, shows large, immature,

nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the

following, is likely to alleviate his symptoms?

1. Thiamine

2. Folic acid and cobalamine

3. Riboflavin

4. Iron compounds

 50%
NEET - 2006
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Which one of the following has an open circulatory system?

1. Pheretima

2. Periplaneta

3. Hirudinaria

4. Octopus

Subtopic:  Human Heart: Double Circulation |
 54%
NEET - 2006
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In the foetus, the ductus arteriosus connects the

1. pulmonary vein with pulmonary artery

2. pulmonary artery with aorta

3. pulmonary vein with aorta

4. pulmonary artery with vena cava

Subtopic:  Human Heart: Gross Anatomy |
 54%
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Which of the following is known as Christmas factor?

1. factor VIII               

2. factor XII

3. factor IV                 

4. factor IX

Subtopic:  Blood: Blood Clotting |
 54%
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