Body Fluids and Circulation · Question 30

Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when

1. AV node receives signal from SA node
2. AV valves open up
3. Ventricular walls vibrate due to gushing in of blood from atria
4. Semilunar valves close down after the blood flows into vessels from ventricles.

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence ?

1. Fibrinogen in plasma
2. Haemocytes
3. Serum albumins
4. Serum globulins

Erythropoiesis starts in

1. spleen
2. red bone marrow
3. kidney
4. liver

Which one of the following is correct?

1. Lymph = Plasma + RBC + WBC
2. Blood = plasma + RBC + WBC + Platelets
3. Plasma = Blood - Lymphocytes
4. Serum = Blood + Fibrinogen

Blood pressure in the mammalian aorta is maximum during

1. systole of the left ventricle
2. diastole of the right atrium
3. systole of the left atrium
4. diastole of the right ventricle.

Person with blood group AB is considered as universal recipient because he has

1. both A and B antigens on RBC but no antibodies in the plasma
2. both A and B antibodies in the plasma
3. no antigen on RBC and no antibody in the plasma
4. both A and B antigens in the plasma but no antibodies.

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.

The diagram given here is the standard ECG of a normal person. The P-wave represents the [figure]

1. beginning of the systole
2. end of systole
3. contraction of both the atria
4. initiation of the ventricular contraction.

The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the label and give its functions? [figure]

1. A - Pulmonary vein - takes impure blood from body parts, pO2 = 60 mm Hg
2. B - Pulmonary artery - takes blood from heart to lungs, pO2 = 90 mm Hg
3. C - Vena cava - takes blood from body parts to right auricle, pCO2 = 45 mm Hg
4. D - Dorsal aorta - takes blood from heart to body parts, pO2 = 95 mm Hg

The figure shows blood circulation in humans with labels A to D. Select the option which gives correct identification of label and functions of the part. [Figure]

1. A - Artery-Thick walled and blood flows evenly
2. C - Vein-Thin walled and blood flows in jerks/spurts
3. D - Pulmonary vein-Takes oxygenated blood to heart, pO2 = 95 mmHg
4. B - Capillary-Thin without muscle layer and wall two cell layers thick