This set of Human Physiology Multiple Choice Questions & Answers (MCQs) focuses on “Body Fluid and Circulation – Blood Clotting & Coagulation”.
1. Tissue plasmin activator _______________
a) helps in wound healing
b) allergy response
c) immunity
d) dissolves clot in blood vessels
View Answer
Explanation: Plasmin is an important enzyme present in blood that degrades fibrin clot. Plasmin protein is encoded by the PLG gene.
2. Which of the following will not coagulate when placed separately on four slides?
a) Blood serum
b) Blood plasma
c) Blood from pulmonary vein
d) Blood from lymphatic tissue
View Answer
Explanation: Blood serum is a component that is neither a blood cell nor a clotting factor. It is the blood plasma not including the fibrinogens.
3. The vitamin essential for blood clotting is _______
a) vitamin A
b) vitamin B
c) vitamin C
d) vitamin K
View Answer
Explanation: Vitamin K is an essential nutrient necessary for responding to injuries. It regulates normal blood clotting. It also helps for bone health.
4. What prevents clotting of blood in blood vessels?
a) Serotonin
b) Fibrinogen
c) Heparin
d) Fibrin
View Answer
Explanation: Heparin is used as an anticoagulant. It inhibits reactions that lead to the clotting of blood and the formation of fibrin clots both in vitro and in vivo.
5. Clumping of cells is known as _______
a) clotting
b) mutation
c) agglutination
d) glutathione
View Answer
Explanation: Agglutination is a process that occurs if an antigen is mixed with its corresponding antibody called isoagglutinin. This is used during blood grouping.
6. Which of the following is correct?
a) Lymph = Plasma + WBC’s + RBC’s
b) Plasma = Blood – Lymphocytes
c) Neuron = Cyton + Dendron + Axon + Synapse
d) Blood = Plasma + RBC’s + WBC’s + Platelets
View Answer
Explanation: Blood is essential for life. Blood consists of plasma, rbcs, wbcs, and platelets.
7. Antibiotics are useful against __________
a) virus
b) bacteria
c) autoimmune disease
d) fungi
View Answer
Explanation: Antibiotics are strong medicines that treat bacterial infections. Antibiotics won’t treat viral infections because they can’t kill viruses.
8. Antigen presenting cells are _______
a) T cells
b) B cells
c) Macrophages
d) Mast cells
View Answer
Explanation: T cells are a type of lymphocyte that lays central role in cell mediated immunity. It has the presence of receptor on the cell surface.
9. Which of the following plasma protein is involved in coagulation of blood?
a) Albumin
b) Globulin
c) Fibrinogen
d) Amylase
View Answer
Explanation: Fibrinogen is a glycoprotein, during tissue injury it is converted by thrombin to fibrin and subsequently to a fibrin based blood clot.
10. In the clotting mechanism pathway, thrombin activates factors ___________
a) XI VIII V
b) XI IX X
c) VIII X V
d) IX VIII X
View Answer
Explanation: Thrombin is encoded by F2 gene. There are 12 clotting factors. Thrombin activates XI, VIII and V factors.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
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