CBSE Questions for Class 11 Medical Biology Body Fluids And Circulation Quiz 7 - MCQExams.com

What happens when a clot occurs in an undamaged blood vessel?
  • The person would bleed to death.
  • A scab will form on the skin surface.
  • Platelets stick to the edges of the cut and to one another, forming a plug.
  • The flow of blood to tissues beyond the clot may be cut off.
Read the statements given below and choose the correct sequence of events leading the formation of a blood clot.
(i) Calcium activates an enzyme.
(ii) Fibrin binds platelets to form a 'plug'.
(iii) Thrombin converts fibrinogen to fibrin.
(iv) Platelets and damaged cells release an activator.
  • (i), (ii), (iii), (iv)
  • (ii), (i), (iii), (iv)
  • (iii), (iv), (i), (ii)
  • (iv), (i), (iii), (ii)
The English physician, William Harvey ........ discovered the circulation of blood.
  • A.D. 1578 -1656
  • A.D. 1578 -1658
  • A.D. 1578 -1657
  • A.D. 1578 -1660
Red blood cells are ........ white blood cells in size.
  • Smaller than
  • Larger than
  • Equal to
  • None of the above
In human, the prothrombin required for blood clotting is produced inside the
  • Liver
  • Blood
  • Bone
  • Spleen
In a closed circulatory system, blood is completely enclosed within the:
  • Skeleton
  • Sinuses
  • Vessels
  • Heart
What is interstitial fluid?
  • Fluid which removes waste
  • Fluid which dissolves nutrients
  • Fluid which occupies spaces between the cells
  • All of the above
Which enzyme induces lysis of fibrinogen to fibrin during fibrinolysis?
  • Plasmin
  • Thrombin
  • Fibrin
  • Trypsin
Which of the following is correctly matched?
  • Human- Renal portal system
  • Earthworm- Closed circulatory system
  • Cockroach- Nephridia
  • None of the above
How lymph acts as middle man in the body ? 
  • It transports food materials, oxygen, hormones etc. to the body cells and brings carbon dioxide and other metabolic wastes from the body cells to blood and then finally pours the same into venous system.
  • It transports metabolic wastes, carbon dioxide, hormones etc. to the body cells and brings oxygen and other food materials from the body cells to blood and then finally pours the same into venous system.
  • It transports metabolic wastes, carbon dioxide, hormones etc. to the body cells and brings oxygen and other food materials from the body cells to blood and then finally pours the same into arterial and capillary system.
  • All of the above
Platelets are
  • Source of growth factors
  • Involved in hemostasis
  • Lead to blood clots
  • All of the above
The oxygenated blood is carried from lungs to left auricle by
  • Vena cava
  • Pulmonary vein
  • Pulmonary artery
  • Aorta
Systole is comprised of 
  • Isovolumetric ventricular contraction
  • Ventricular ejection
  • Both A and B
  • Isovolumetric ventricular relaxation
Which of the following cells has a lifespan of 5-9 days?
  • WBC
  • Platelets
  • RBC
  • None of the above
Lymph is transported through the
  • Lymph nodes
  • Lymphocytes
  • Lymph nerves
  • Lymph vessels
Lymph lacks
  • WBC
  • RBC
  • Tissue fluid
  • All of the above
The lymph is ....... in nature.
  • Solid
  • Liquid
  • Semi-solid
  • Gas
Which of the following are circulating fluids of the body?

a) Blood         b) Hormones       c) Lymph
  • a, b
  • b, c
  • a, c
  • All of the above

Blood vessels entering the liver are known as

  • Hepatic artery
  • Hepatic vein
  • Renal artery
  • All of the above
Lymph does not contain:
  • Red blood cells
  • Digested fats
  • Haemoglobin
  • Both A and C
Lymph helps is the absorption of
  • Carbohydrate
  • Proteins
  • Fats
  • All of the above
Which of the following is not a function of lymph?
  • Transport of oxygen, hormones and nutrients to different parts of the body .
  • Prevention of infections due to microbes. 
  • Absorption of vitamins and minerals.
  • Conduction of nerve impulses. 
A human digestive enzyme breaks down its substrate at a fast rate at $$35^{\circ}C$$. What would occur if the enzyme and substrate were kept at $$75^{\circ}C$$?
  • The enzyme would stop working and be denatured.
  • The reaction would continue at the same rate.
  • The reaction would take place more quickly.
  • The reaction would take place more slowly.
Which of the following is an example of portal vein?
  • Renal portal vein
  • Hepatic portal vein
  • Both A and B
  • None of the above

The veins starting from the stomach and intestines do not directly convert the blood to the posterior vena cava. Instead, they first enter the ........... as a combined hepatic portal vein.
  • Kidney
  • Pancreas
  • Spleen
  • Liver
The vein which is formed from the capillaries of an organ and terminates into capillaries in some other organ before entering the heart is called as
  • Pulmonary vein
  • Coronary vein
  • Portal vein
  • Systemic vein
Red color of blood is due to the presence of  __________.
  • Lymphocytes
  • Thrombocytes
  • Erythrocytes
  • Leucocytes
The photograph shows some blood as seen under the microscope.
What is the function of the cell labelled X? 
457302.PNG
  • Blood clotting
  • Carrying oxygen
  • Defending against disease
  • Transporting hormones
The immune system helps to protect you against viruses and bacteria that can cause sickness. Which cells are part of the immune system?
  • White blood cells
  • Red blood cells
  • Nerve cells
  • None of the above
Which of the following has the similarities with the lymph?
  • Red blood cells
  • Blood plasma
  • White blood cells
  • Nutrients
Identify the set of collecting and distributing blood vessels in Pheretima.
  • Latero oesophageal blood vessel and subneural blood vessel
  • Dorsal blood vessel and commisural blood vessel
  • Dorsal blood vessel and ventral blood vessel
  • Ring vessels and anterior loops
_______ involves circulation of blood to all parts of the body except lungs.
  • Cardiovascular circulation
  • Pulmonary circulation
  • Systemic circulation
  • All of the above
Which is not the function of lymph?
  • Transports RBCs
  • Drains excess tissue fluid
  • Transports lymphocytes and antibodies
  • Carries digested and absorbed fats from intestine
Which of the following describes homeostasis?
  • An animal maintaining a home range.
  • A population maintaining a constant population size.
  • Females remaining in their parents territory.
  • Plants ceasing to grow at a maximum height.
  • Maintaining internal environment in a steady state 
Identify the correct pathway of blood circulation.
497034.jpg
  • 1 to 2 to 3 to 4 to 1
  • 1 to 3 to 2 to 4 to 1
  • 1 to 4 to 2 to 3 to 1
  • 2 to 3 to 4 to 1 to 2
  • 2 to 4 to 3 to 1 to 2
Deoxygenated blood is carried by
I. Pulmonary veins
II. Anterior vena cava
III. Pulmonary arteries
  • I only
  • II only
  • III only
  • I and II
  • II and III
Normal pathway of blood flow is
  • Right ventricle to aorta
  • Pulmonary veins to left atrium
  • Inferior vena cava to left atrium
  • Pulmonary veins to left ventricle
  • Left ventricle to pulmonary artery
Which of the following conditions will occur if the RBCs are placed in a hypotonic solution?
  • Shrink due to osmotic water loss
  • Rupture due to the influx of water
  • Maintain their shape due to the cell wall
  • Swell but avoid rupturing due to the cell wall
  • Pump out excess water with the contractile vacuole
Which of the following is true for RBCs?
  • They have no nucleus.
  • They are replaced in the liver.
  • They are outnumbered by white blood cells in the circulatory system.
  • They are made in the spleen.
  • They are the sites of rapid protein synthesis.
The correct order of the flow of blood through the heart, entering from vena cava is
  • Left atrium $$\rightarrow $$ left ventricle $$\rightarrow $$ right ventricle $$\rightarrow $$ right atrium
  • Left ventricle $$\rightarrow $$ left atrium $$\rightarrow $$ right atrium $$\rightarrow $$ right ventricle
  • Right atrium $$\rightarrow $$ right ventricle $$\rightarrow $$ left atrium $$\rightarrow $$ left ventricle
  • Right ventricle $$\rightarrow $$ right atrium $$\rightarrow $$ left atrium$$\rightarrow $$ left ventricle
  • Right ventricle $$\rightarrow $$ right atrium $$\rightarrow $$ left ventricle $$\rightarrow $$ left atrium
Iron (Fe) atoms are present in the molecule of
  • Histone
  • Catalase
  • Chlorophyll
  • Haemoglobin
  • RNA polymerase
Which of the following carries carbon dioxide during exhalation?
I. Plasma
II. Erythrocytes
III. Haemoglobin molecules
  • I only
  • II only
  • III only
  • I and II
  • I, II and III
The correct pathway of blood circulation in the human body is
  • Heart $$\rightarrow$$ Pulmonary vein $$\rightarrow$$ Capillary $$\rightarrow$$ Pulmonary artery $$\rightarrow$$ Heart
  • Heart $$\rightarrow$$ Pulmonary artery $$\rightarrow$$ Lungs $$\rightarrow$$ Pulmonary vein $$\rightarrow$$ Body systems $$\rightarrow$$ Heart
  • Heart $$\rightarrow$$ Pulmonary artery $$\rightarrow$$ Lungs $$\rightarrow$$ Pulmonary vein $$\rightarrow$$ Heart $$\rightarrow$$ Body systems
  • Body systems $$\rightarrow$$ Lungs $$\rightarrow$$ Heart $$\rightarrow$$ Vein $$\rightarrow$$ Capillary $$\rightarrow$$ Artery.
  • Heart $$\rightarrow$$ Pulmonary artery $$\rightarrow$$ Lungs $$\rightarrow$$ Body systems $$\rightarrow$$ Vein $$\rightarrow$$ Heart.
Human RBC has 
  • None of the above
  • A nucleus
  • No nucleus
  • More than one nucleus
Which of the following statements about red blood cells in human is/are true?
  • Are released from the bone marrow as mature red blood cells
  • Do no contain mitochondria
  • Have a life span of 120 days in the circulation
  • All of the above
On which side of the human heart is low in oxygen?
  • Left ventricle
  • Right ventricle
  • Left atrium
  • Right atrium
Which of the following statements is true about red blood cells?
  • Protect the body from diseases
  • Carry oxygen to every part of the body
  • Biconcave in shape and have no nucleus
  • Both B and C
Which of the following removes debris from cells?
  • Blood 
  • Lymph 
  • Interstitial fluid 
  • All of the above
Choose the correct path of blood from the heart.
  • Vena cava, right atrium, right ventricle, aorta, lungs
  • Lungs, pulmonary vein, right atrium, right ventricle, aorta
  • Vena cava, right atrium, right ventricle, lungs, pulmonary vein
  • Vena cava, left atrium, left ventricle, lungs, pulmonary artery
  • Left ventricle, lungs, pulmonary vein, pulmonary artery, right atrium
Which of the following molecule enters into the lymph from intestine?
  • Fat molecules
  • Glycerols
  • Plasma protein
  • None of the above
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 11 Medical Biology Quiz Questions and Answers