Body Fluids and Circulation · Question 43

Given below is the ECG of a normal human. Which one of its components is correctly interpreted below? [figure]

1. Complex QRS - one complete pulse
2. Peak T - initiation of total cardiac contraction
3. Peak P and peak R together - systolic and diastolic blood pressures
4. Peak P - initiation of left atrial contraction only

'Bundle of His' is a part of which one of the following organs in humans?

1. Brain
2. Heart
3. Kidney
4. Pancreas

Which one of the following plasma proteins is involved in the coagulation of blood?

1. Albumin
2. Serum amylase
3. Globulin
4. Fibrinogen

Arteries are best defined as the vessels which

1. supply oxygenated blood to the different organs
2. carry blood away from the heart to different organs
3. break up into capillaries which reunite to form a vein
4. carry blood from one visceral organ to another visceral organ.

Which one of the following statements is correct regarding blood pressure?

1. 130/90 mm Hg is considered high and requires treatment.
2. 100/55 mm Hg is considered an ideal blood pressure.
3. 105/50 mm Hg makes one very active.
4. 190/110 mm Hg may harm vital organs like brain and kidney.

A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His friend who has valid certificate 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 B
2. Type AB
3. Type O
4. Type A

Fastest distribution of some injectable material/medicine and with no risk of any kind can be achieved by injecting it into the

1. muscles
2. arteries
3. veins
4. lymph vessels

Given below are four statements (i – iv) regarding human blood circulatory system. (i) Arteries are thick-walled and have narrow lumen as compared to veins. (ii) Angina is acute chest pain when the blood circulation to the brain is reduced. (iii) Persons with blood group AB can donate blood to any person with any blood group under ABO system. (iv) Calcium ions play a very important role in blood clotting. Which two of the above statements are correct?

1. (i) and (iv)
2. (i) and (ii)
3. (ii) and (iii)
4. (iii) and (iv)

The haemoglobin content per 100 mL of blood of a normal healthy human adult is

1. 5–11 g
2. 25–30 g
3. 17–20 g
4. 12–16 g

If due to some injury the chordae tendineae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

1. The flow of blood into the aorta will be slowed down
2. The 'pacemaker' will stop working
3. The blood will tend to flow back into the left atrium
4. The flow of blood into the pulmonary artery will be reduced