• Circulatory System - 3
Back
0

Circulatory System - 3

Description: The Circulatory system III
Number of Questions: 21
Created by:
Tags: The Circulatory system III Blood Coagulation Rh Factor Structure of Vein, Artery and Capillary Functions of Blood
Start the Quiz
Attempted 0/21 Correct 0 Score 0
‹
›

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

Show answer
Correct Option: C
Explanation:

Person having 'O' blood group has both the antibodies a and b but he does not have any antigen. So, it can donate blood to all the persons but can receive only 'O' blood group.

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

Show answer
Correct Option: C
Explanation:

Agglutinin or antibody is a gamma globulin protein in the blood plasma.

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

Show answer
Correct Option: A
Explanation:

The antigens of the donor's blood can react with antibodies of the recipient's blood and cause clumping of RBCs. This phenomenon is called agglutination.

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.

Show answer
Correct Option: B
Explanation:

Thromobplastin forms an enzyme prothrombinase that inactivates heparin andconverts inactive plasma protein; prothrombin into thrombin, which converts fibrinogen into fibrin monomers that polymerise to form long threads to clot the blood.

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

  1. A

  2. B

  3. AB

  4. O

Show answer
Correct Option: B
Explanation:

Group B possesses corpuscle factor (antigen) B and plasma factor (antibody) 'a'.

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.

Show answer
Correct Option: B
Explanation:

Arteries carry oxygenated blood from heart to various parts of the body.

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)

Show answer
Correct Option: B
Explanation:

Erythroblastosis foetalis is caused due to the incompatibility of Rh factor between a pregnant woman and her second foetus.

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.

Show answer
Correct Option: B
Explanation:

Lymph contains fewer plasma proteins and a low concentration of calcium and phosphorus.

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.

Show answer
Correct Option: B
Explanation:

The auricles are demarcated externally from the ventricles by an irregular groove called coronary sulcus.

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

Show answer
Correct Option: D
Explanation:

Vagus nerve maintains a constant heart beat.

______________ consist of a layer of single celled thickness.

  1. Blood capillaries

  2. Veins

  3. Arteries

  4. Arterioles

  5. Platelets

Show answer
Correct Option: A
Explanation:

Blood capillaries consist of thick layers.

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

Show answer
Correct Option: B
Explanation:

Arteriosclerosis can cause heart attack.

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

Show answer
Correct Option: A
Explanation:

Pericardial fluid reduces friction between the heart wall and surrounding tissues when the heart beats.

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

Show answer
Correct Option: D
Explanation:

Veins are provided with semilunar valves, which prevent the backward flow of blood.

Which of the following is not phagocytic in nature?

  1. Lymphocytes

  2. Neutrophils

  3. Monocytes

  4. Mast cells

  5. Basophils

Show answer
Correct Option: A
Explanation:

Lymphocytes only produce antibodies. So, they are not phagocytic.

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

Show answer
Correct Option: D
Explanation:

Basophils release histamine and heparin in blood.

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

  1. Thymus

  2. Liver

  3. Spleen

  4. Kidney

  5. Heart

Show answer
Correct Option: C
Explanation:

Spleen is called the graveyard of RBCs as it filters the blood and removes the damaged or dead cells from the blood.

Which of the following are present in an antiserum?

  1. Antigens

  2. Antibodies

  3. Leucocytes

  4. RBCs

  5. WBCs

Show answer
Correct Option: B
Explanation:

Antiserum contains antibodies to provide immunity to the body.

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.

Show answer
Correct Option: C
Explanation:

If the heart nerve is cut, the heart will beat rhythmically.

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)

Show answer
Correct Option: A
Explanation:

Portal vein does not carry blood directly to the heart but forms a network of capillaries on another organ before reaching the heart.

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

Show answer
Correct Option: C
Explanation:

Hypophyseal portal vein carries blood from the hypothalamus of the brain to the anterior lobe of pituitary gland.

- Hide questions
ADVERTISEMENT

Find more quizzes from top tags

general knowledge
3615 Quizzes
119858 Questions
 technology
307 Quizzes
36705 Questions
 sports
963 Quizzes
19148 Questions
 history
1187 Quizzes
13475 Questions
 physics
598 Quizzes
13441 Questions
 biology
1160 Quizzes
12174 Questions
 science & technology
551 Quizzes
11015 Questions
 chemistry
490 Quizzes
9892 Questions
 maths
518 Quizzes
9324 Questions
 softskills
0 Quizzes
7131 Questions