Body Fluids and Circulation

Body Fluids and Circulation

Moderate Questions
Difficult Questions

Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. A vein possesses a large lumen because








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    Veins have larger lumen because the wall of blood vessels is made up of tunica externa, tunica media & tunica interna is thin in veins.

    Correct Option: D

    Veins have larger lumen because the wall of blood vessels is made up of tunica externa, tunica media & tunica interna is thin in veins.

  1. Vitamin K is required for








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    Synthesis of prothrombin helps in coagulation of blood. Vitamin K is required for the synthesis of prothrombin and blood clotting factors I, VII, IX and X.

    Correct Option: D

    Synthesis of prothrombin helps in coagulation of blood. Vitamin K is required for the synthesis of prothrombin and blood clotting factors I, VII, IX and X.

  1. Pacemaker of heart is








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    Sino-Auricular node (S.A node) present in the walls of right auricle has a myogenic initiation of heartbeat in a regular fashion and controls the pace of heartbeat.

    Correct Option: C

    Sino-Auricular node (S.A node) present in the walls of right auricle has a myogenic initiation of heartbeat in a regular fashion and controls the pace of heartbeat.

  1. Sickle cell anaemia is characterised by








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    In sickle cell anaemia, normal haemoglobin (HbA) gets changed in denatured form of haemoglobin (HbS) in which the haemoglobin molecule’s configuration changes and it changes its shape, in low O2 concentration unable to transport O2 transportation and RBCs become sickle shaped. It is a genetic disease caused by the denaturation of haemoglobin, that is why it is known as hemolytic anaemia.

    Correct Option: D

    In sickle cell anaemia, normal haemoglobin (HbA) gets changed in denatured form of haemoglobin (HbS) in which the haemoglobin molecule’s configuration changes and it changes its shape, in low O2 concentration unable to transport O2 transportation and RBCs become sickle shaped. It is a genetic disease caused by the denaturation of haemoglobin, that is why it is known as hemolytic anaemia.

  1. Bundle of His is a network of








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    The atrioventricular bundle (AV bundle), on entering the ventricles splits into right and left branches. These branches then enter the heart muscles. They branch extensively and are called Purkinje fibres. They conduct the cardiac impulse to the ventricular wall.

    Correct Option: C

    The atrioventricular bundle (AV bundle), on entering the ventricles splits into right and left branches. These branches then enter the heart muscles. They branch extensively and are called Purkinje fibres. They conduct the cardiac impulse to the ventricular wall.