Q. No.Which of the following is associated with a decrease in cardiac output?
1. Sympathetic nerves
2. Parasympathetic neural signals
3. Pneumotaxic center
4. Adrenal medullary hormones
Given below are four statements (a-d) regarding human blood circulatory system:
| (a) | Arteries are thick-walled and have narrow lumen as compared to veins |
| (b) | Angina is acute chest pain when the blood circulation to the brain is reduced |
| (c) | Persons with blood group AB can donate blood to any person with any blood group under ABO system |
| (d) | Calcium ions play a very important role in blood clotting |
Which two of the above statements are correct?
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (d)
Given below is the ECG of a normal human. Which one of its components is correctly interpreted below?
| 1. | Peak P-Initiation of left atrial contraction only |
| 2. | Complex QRS-One complete pulse |
| 3. | Peak T-Initiation of total cardiac contraction |
| 4. | Peak P and Peak R together-systolic and diastolic blood pressures |
Arterial blood pressure in human beings is:
1. 120 and 80 mm Hg
2. 150 and 100 mm Hg
3. 50 and 100 mm Hg
4. None of the above
Ventricular contraction is in command of :
1. S.A. Node
2. A.V. Node
3. Purkinje fibers
4. Papillary muscles
At which point, the pulmonary artery is different from the pulmonary vein:
1. Its lumen is broad
2. Its wall is thick
3. It has valves
4. It does not possess endothelium
Erythroblastosis foetalis occurs when a factor from mother passes into the foetus through the placenta. The factor is
1. Rh antigen
2. Rh antibodies
3. Agglutinins
4. ABO antibodies
Oxygen carrier in human blood is
1. Carbonic anhydrase
2. Haemoglobin
3. Haemocyanin
4. Both (1) & (3)
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