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Circulatory System - 3

The Circulatory system III

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following antibodies is/are present in the person having 'O' blood group?

  1. Only a
  2. Only b
  3. Both a and b
  4. Either a or b
Question 2 Multiple Choice (Single Answer)

Which of the following gamma globulin proteins is present in the blood plasma and is called the 'plasma factor'?

  1. Agglutinogen
  2. Antigen
  3. Agglutinin
  4. Fibrin
Question 3 Multiple Choice (Single Answer)

If a person with blood group 'A' is transfused with blood group B, which of the following phenomenon will occur?

  1. Agglutination
  2. Erythroblastosis
  3. Polymerisation
  4. Thrombogenesis
Question 4 Multiple Choice (Single Answer)

Which of the following statements is incorrect about the mechanism of blood clotting?

  1. Blood platelets burst when they come in contact with environment.
  2. Thromboplastin forms prothrombinase, which activates heparin.
  3. Thrombin acts as a proteolytic enzyme and converts fibrinogen into fibrin monomers.
  4. The fibrin monomers polymerise to form long threads.
  5. The clot seals the wound and the platelets entrapped in the clot release more thromboplastin.
Question 5 Multiple Choice (Single Answer)

Which of the following blood groups possesses corpuscle factor 'B' and plasma factor 'a'?

  1. A
  2. B
  3. AB
  4. O
Question 6 Multiple Choice (Single Answer)

Which of the following is true about arteries?

  1. They carry deoxygenated blood from different body parts to the heart.
  2. They carry oxygenated blood from heart to different body parts.
  3. In arteries, blood flows with low speed and under low pressure.
  4. They possess valves.
  5. Their lumens are thin and less elastic.
Question 7 Multiple Choice (Single Answer)

Which of the following disorders is caused due to the incompatibility of Rh factor between a pregnant woman and her foetus?

  1. Erythropoisis
  2. Erythroblastosis
  3. Leukemia
  4. Erythrocytopenia
  5. Both (2) and (3)
Question 8 Multiple Choice (Single Answer)

Which of the following statements is not true about lymph?

  1. It is a colourless fluid and lacks erythrocytes.
  2. It contains many plasma proteins and high concentration of calcium and phosphorus.
  3. It consists of a fluid matrix in which white blood corpuscles are present.
  4. It mainly conveys materials from tissue cells into the blood.
  5. Its flow is very slow in the body.
Question 9 Multiple Choice (Single Answer)

Which of the following statements about heart is incorrect?

  1. Heart possesses upper small sized auricles or atrium and lower large sized ventricles.
  2. The auricles are demarcated externally from ventricles by the coronary sulcus.
  3. Auricles are the thin walled chambers and are called the receiving chambers.
  4. The wall of left ventricle is thicker than that of light ventricle.
  5. The walls of atria are thinner than that of ventricles.
Question 10 Multiple Choice (Single Answer)

Which of the following is the function of vagus nerve?

  1. To initiate the heart beat
  2. To reduce the heart beat
  3. To accelerate the heart beat
  4. To maintain constant heart beat
  5. To prevent the heart from shocks
Question 11 Multiple Choice (Single Answer)

______________ consist of a layer of single celled thickness.

  1. Blood capillaries
  2. Veins
  3. Arteries
  4. Arterioles
  5. Platelets
Question 12 Multiple Choice (Single Answer)

Which of the following events is the most probable cause of a heart attack?

  1. Vasomotion
  2. Arteriosclerosis
  3. Systolic pressure of 120 mm of hg
  4. High level of HDL
  5. Vasodilation
Question 13 Multiple Choice (Single Answer)

Which of the following functions is performed by the pericardial fluid?

  1. To reduce the friction between the heart wall and surrounding tissues
  2. To protect the heart from mechanical injury
  3. To allow the diffusion of oxygen into intracellular space
  4. To prevent the entry of deoxygenated blood in the pericardial cavity
  5. To provide the elasticity to the walls
Question 14 Multiple Choice (Single Answer)

Why are semilunar valves present in the veins?

  1. To allow the movement of leucocytes through them
  2. To allow the diffusion of oxygen into the intercellular fluids
  3. To prevent the loss of nutrients form the blood
  4. To prevent the backward flow of blood
  5. To prevent the entry of pathogens into the veins
Question 15 Multiple Choice (Single Answer)

Which of the following is not phagocytic in nature?

  1. Lymphocytes
  2. Neutrophils
  3. Monocytes
  4. Mast cells
  5. Basophils
Question 16 Multiple Choice (Single Answer)

Which of the following types of white bloods are concerned with the release of histamine and natural anticoagulant heparin?

  1. Eosinophils
  2. Monocytes
  3. Neutrophils
  4. Basophils
  5. Leucocytes
Question 17 Multiple Choice (Single Answer)

Which of the following organs is called the graveyard of RBCs?

  1. Thymus
  2. Liver
  3. Spleen
  4. Kidney
  5. Heart
Question 18 Multiple Choice (Single Answer)

Which of the following are present in an antiserum?

  1. Antigens
  2. Antibodies
  3. Leucocytes
  4. RBCs
  5. WBCs
Question 19 Multiple Choice (Single Answer)

What will happen to the heart if the nerve of heart is cut?

  1. It will stop.
  2. It will shrink.
  3. It will beat rhythmically.
  4. It will beat arythmically.
  5. It will burst.
Question 20 Multiple Choice (Single Answer)

Consider the following statements:
(a) Portal veins carry blood directly to the heart and forms a network of capillaries.
(b) In human beings, two main portal systems; hepatic and the hypophyseal portal systems are present.
(c) A pair of hepatic veins carries blood from liver to the inferior vena cava.
(d) The blood from intestine, pancreas and spleen is drained into liver via. the hepatic portal vein.

Which of the above statements is/are incorrect about portal system of a man?

  1. Only (a)
  2. Both (a) and (b)
  3. Only (d)
  4. Only (c)
  5. Both (b) and (d)
Question 21 Multiple Choice (Single Answer)

Which of the following veins carries blood from hypothalamus of brain to the anterior lobe of pituitary gland?

  1. Hepatic portal vein
  2. Hepatic vein
  3. Hypophyseal portal vein
  4. Juglar vein
  5. Iliac vein
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