This set of Human Physiology Questions and Answers for Entrance exams focuses on “Composition and Function of Human Blood”.
1. Which of the following component cause coagulation if introduced to the blood stream?
Explanation: Thromboplastin is a plasma protein aiding blood coagulation. It catalyzes the conversion of prothrombin to thrombin.
2. Process of formation of blood corpuscles is called ____________
Explanation: Haemopoeisis is the production of blood cells and platelets. It occurs in bone marrow.
3. The normal blood pressure of an adult is __________
a) 100/80 mm Hg
b) 100/60 mm Hg
c) 120/80 mm Hg
d) 80/120 mm Hg
Explanation: Blood pressure is the pressure of circulating blood on the walls of blood vessels. The normal blood pressure of an adult is 120/80 mm Hg.
4. What is Pernicious anemia?
a) Low RBC count
b) Destruction of RBC maturation
c) Death of WBC
d) Low WBC count
Explanation: Pernicious anemia is decreased in red blood cells when body can’t absorb enough vitamin B12. There are more than 1 million cases in India.
5. Graveyard of RBC is ____________
Explanation: Spleen is known as Graveyard of RBC. For every 120 days new RBCs are formed. Old blood cells are recycled in spleen.
6. Which leucocytes release heparin and histamine into the blood?
Explanation: Basophils contain heparin. This is the naturally occurring blood thinning substance. It is seen in WBCs.
7. Which among the following is true regarding leucocytes?
a) They are enucleated
b) Produced in thymus
c) Sudden fall in number indicate cancer
d) They can squeeze through capillary walls
Explanation: Leucocytes are involved in protecting body against infectious disease. They are produced in bone marrow. Leucocytes can squeeze through capillary walls and this is called as diapedesis.
8. Largest sized RBC is seen in _______
Explanation: Largest RBC is seen in amphiuma. RBCs are an important part of blood. They help in the transportation of oxygen throughout the body.
9. Irregular nuclei are seen in ______________
Explanation: Neutrophil is a type of immune cell. They fight infection by ingesting microorganisms and releasing the enzymes that kill the microorganisms.
10. Hemoglobin is a ___________
a) respiratory pigment
b) reproductive pigment
Explanation: Hemoglobin is the iron containing oxygen transport metalloprotein in RBCs. It is abbreviated as Hb.
11. Hemophilia is due to absence of __________
a) factor VI
b) factor VII
c) factor VIII
d) factor X
Explanation: Hemophilia is a disorder in which blot doesn’t clot normally. There are different types of Hemophilia. It is due to the absence of Factor VIII.
12. Which of the following is not the cellular element of blood?
a) T cells
b) B cells
Explanation: Plasma is not the cellular elements of blood. Blood plasma is yellowish colored liquid. It makes up 55% of the body’s total blood volume. It contains water and dissolved proteins.
13. Red cell count is carried out using _____________
Explanation: Haemocytometer is a specialized slide that has counting chamber with a known volume of liquid. It is used to count RBC.
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