Class 11/Question Bank
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Questions on Circulation
What percentage of blood is constituted by plasma? a) 45% b) 55% c) 65% d) 75%
Which protein is NOT found in blood plasma? a) Fibrinogen b) Albumin c) Globulin d) Myosin
The life span of RBCs is approximately: a) 90 days b) 120 days c) 150 days d) 180 days
Which cells are anucleated in mammals? a) WBCs b) Platelets c) RBCs d) All blood cells
The shape of RBCs is: a) Spherical b) Biconcave c) Oval d) Irregular
Haemoglobin contains which metal ion? a) Copper b) Zinc c) Iron d) Magnesium
Which WBC type is most abundant? a) Lymphocytes b) Monocytes c) Neutrophils d) Eosinophils
Platelets are formed from: a) Lymphoblasts b) Megakaryocytes c) Monocytes d) Neutrophils
Universal donor blood group is: a) A b) B c) AB d) O
Universal recipient blood group is: a) A b) B c) AB d) O
Blood group A has which antigen and antibody? a) Antigen A, Anti-A b) Antigen A, Anti-B c) Antigen B, Anti-A d) No antigen, Anti-B
Erythroblastosis foetalis is caused by: a) ABO incompatibility b) Rh incompatibility c) Both d) Neither
The first step in blood clotting involves: a) Fibrinogen b) Thrombin c) Platelet aggregation d) Fibrin formation
Thrombokinase converts: a) Fibrinogen to fibrin b) Prothrombin to thrombin c) Thrombin to fibrinogen d) Fibrin to fibrinogen
Lymph is formed from: a) Blood plasma b) Tissue fluid c) Both a and b d) Neither
The heart is located in: a) Abdominal cavity b) Pelvic cavity c) Thoracic cavity d) Cranial cavity
The heart is covered by: a) Pleura b) Pericardium c) Peritoneum d) Meninges
How many chambers does the human heart have? a) 2 b) 3 c) 4 d) 5
The valve between right atrium and right ventricle is: a) Bicuspid b) Tricuspid c) Semilunar d) Mitral
The bicuspid valve is also called: a) Tricuspid valve b) Mitral valve c) Aortic valve d) Pulmonary valve
The duration of one cardiac cycle is approximately: a) 0.6 seconds b) 0.8 seconds c) 1.0 seconds d) 1.2 seconds
The first heart sound "lub" is produced by: a) Opening of AV valves b) Closing of AV valves c) Opening of semilunar valves d) Closing of semilunar valves
In ECG, the P-wave represents: a) Atrial depolarization b) Ventricular depolarization c) Atrial repolarization d) Ventricular repolarization
The largest wave in ECG is: a) P-wave b) Q-wave c) QRS complex d) T-wave
Normal systolic blood pressure is approximately: a) 80 mmHg b) 120 mmHg c) 140 mmHg d) 160 mmHg
Hypertension is diagnosed when blood pressure exceeds: a) 120/80 mmHg b) 130/85 mmHg c) 140/90 mmHg d) 150/95 mmHg
Which circulation carries blood to the lungs? a) Systemic b) Pulmonary c) Portal d) Coronary
Atherosclerosis is the deposition of: a) Only cholesterol b) Only calcium c) Calcium, fat, cholesterol and fibrous tissue d) Only fibrous tissue
Angina pectoris is characterized by: a) Chest pain b) Difficulty breathing c) Rapid heartbeat d) All of these
Water constitutes what percentage of plasma? a) 80-85% b) 85-88% c) 90-92% d) 95-98%
Serum is: a) Plasma with clotting factors b) Plasma without clotting factors c) Blood without RBCs d) Blood without WBCs
Which ion is essential for blood clotting? a) Na⁺ b) K⁺ c) Ca²⁺ d) Mg²⁺
Basophils secrete: a) Only histamine b) Only heparin c) Histamine, serotonin and heparin d) Only serotonin
B and T lymphocytes are responsible for: a) Blood clotting b) Oxygen transport c) Immune responses d) Nutrient transport
The formation of RBCs occurs in: a) Liver b) Spleen c) Red bone marrow d) Yellow bone marrow
Eosinophils are associated with: a) Bacterial infections b) Viral infections c) Allergic reactions and parasitic infections d) Fungal infections
Monocytes are: a) Phagocytic b) Non-phagocytic c) Only involved in immunity d) Only involved in clotting
Which blood group has no antibodies? a) A b) B c) AB d) O
An Rh⁻ mother with Rh⁺ fetus may lead to: a) ABO incompatibility b) Erythroblastosis foetalis c) Thalassemia d) Sickle cell anemia
Fibrinogen is converted to fibrin by: a) Thrombokinase b) Thrombin c) Prothrombin d) Calcium
Lymph differs from blood in: a) Lack of RBCs b) Presence of specialized lymphocytes c) Colorless appearance d) All of these
The left ventricle pumps blood into: a) Pulmonary artery b) Aorta c) Vena cava d) Pulmonary vein
Semilunar valves are present at the opening of: a) Atria into ventricles b) Ventricles into arteries c) Veins into atria d) Arteries into veins
Joint diastole means: a) All chambers contract b) All chambers relax c) Only atria relax d) Only ventricles relax
Ventricular systole causes: a) First heart sound b) Second heart sound c) Both sounds d) No sound
T-wave in ECG represents: a) Atrial depolarization b) Atrial repolarization c) Ventricular depolarization d) Ventricular repolarization
Diastolic pressure is the pressure during: a) Atrial contraction b) Ventricular contraction c) Ventricular relaxation d) Complete cardiac rest
Blood returns to the right atrium through: a) Aorta b) Pulmonary artery c) Vena cava d) Pulmonary vein
CAD stands for: a) Cardiac Arrhythmia Disease b) Coronary Artery Disease c) Chronic Arterial Disease d) Congenital Atrial Defect
Heart failure means: a) Heart stops beating b) Heart beats irregularly c) Heart doesn't pump effectively d) Heart beats too fast
Granulocytes include: a) Lymphocytes and monocytes b) Neutrophils, eosinophils, and basophils c) Only neutrophils d) All WBCs
The biconcave shape of RBCs helps in: a) Increased surface area b) Easy passage through capillaries c) Better oxygen transport d) All of these
Plasma proteins are mainly synthesized in: a) Bone marrow b) Spleen c) Liver d) Kidneys
Which blood group can receive blood from all groups? a) A b) B c) AB d) O
The clotting cascade requires: a) Only platelets b) Only calcium c) Platelets, calcium, and clotting factors d) Only clotting factors
Lymph nodes are important for: a) Blood formation b) Immunity c) Digestion d) Respiration
The pericardial fluid: a) Nourishes heart muscle b) Reduces friction c) Conducts electrical impulses d) Stores energy
Atrial systole occurs: a) Before ventricular systole b) After ventricular systole c) Simultaneously with ventricular systole d) During ventricular diastole
The QRS complex indicates: a) Atrial activity b) Ventricular contraction c) Heart rate d) Blood pressure
Systemic circulation begins from: a) Right ventricle b) Left ventricle c) Right atrium d) Left atrium
Pulmonary veins carry: a) Deoxygenated blood b) Oxygenated blood c) Mixed blood d) No blood
Hypertension can lead to: a) Stroke b) Heart disease c) Kidney damage d) All of these
Atherosclerosis primarily affects: a) Veins b) Arteries c) Capillaries d) Lymph vessels
The term "double circulation" means: a) Blood circulates twice in the body b) Blood passes through heart twice c) Heart beats twice d) Blood has two components
Neutrophils are primarily involved in: a) Allergic reactions b) Immune responses c) Phagocytosis of bacteria d) Blood clotting
The average human has approximately how many RBCs per microliter? a) 3-4 million b) 4-5 million c) 5-6 million d) 6-7 million
Hemoglobin's primary function is: a) Blood clotting b) Immunity c) Oxygen transport d) Nutrient transport
Which chamber of the heart has the thickest muscular wall? a) Right atrium b) Left atrium c) Right ventricle d) Left ventricle
The SA node is known as: a) Pacemaker b) Bundle of His c) Purkinje fibers d) AV node
Blood pressure is measured using: a) ECG b) Stethoscope c) Sphygmomanometer d) Thermometer
Edema is caused by: a) Excess lymph formation b) Reduced lymph drainage c) Increased capillary permeability d) All of these
The hepatic portal system connects: a) Heart to liver b) Digestive organs to liver c) Liver to kidneys d) Liver to lungs
Vasoconstriction: a) Increases blood pressure b) Decreases blood pressure c) Has no effect d) Only affects heart rate
The term "cardiac output" refers to: a) Heart rate b) Stroke volume c) Amount of blood pumped per minute d) Blood pressure
Artificial pacemakers are used to treat: a) High blood pressure b) Heart rhythm disorders c) Heart attacks d) Angina
Myocardial infarction is: a) Heart attack b) Heart failure c) Irregular heartbeat d) High blood pressure
Anticoagulants prevent: a) Infection b) Blood clotting c) High blood pressure d) Heart attacks
The right side of the heart pumps: a) Oxygenated blood b) Deoxygenated blood c) Mixed blood d) Plasma only
Capillaries are: a) Smallest blood vessels b) Sites of exchange c) One cell thick d) All of these
Venous return is aided by: a) Muscle contractions b) Valve action c) Breathing movements d) All of these
The spleen is involved in: a) RBC destruction b) Blood storage c) Immunity d) All of these
Tachycardia means: a) Slow heart rate b) Fast heart rate c) Irregular heart rate d) No heart rate
Bradycardia means: a) Slow heart rate b) Fast heart rate c) Irregular heart rate d) High blood pressure
The coronary circulation supplies: a) Brain b) Heart muscle c) Lungs d) Kidneys
Stroke volume is: a) Blood pumped per beat b) Blood pumped per minute c) Heart rate d) Blood pressure
The aortic valve is a: a) AV valve b) Semilunar valve c) Tricuspid valve d) Bicuspid valve
Blood type testing involves: a) Antigen detection b) Antibody detection c) Both d) Neither
Rh factor is: a) An antigen b) An antibody c) A protein d) A hormone
Hemolysis is: a) Blood clotting b) RBC destruction c) WBC formation d) Platelet aggregation
The lymphatic system: a) Returns excess fluid b) Absorbs fats c) Provides immunity d) All of these
Cardiac muscle is: a) Voluntary b) Involuntary c) Smooth d) Skeletal
The Bundle of His: a) Generates impulses b) Conducts impulses c) Contracts d) Relaxes
Pulse rate is normally: a) 60-100 bpm b) 50-90 bpm c) 70-120 bpm d) 80-140 bpm
Arteries carry blood: a) To the heart b) Away from the heart c) In both directions d) Only to lungs
Veins have: a) Thick walls b) Valves c) High pressure d) All of these
The cardiac cycle is controlled by: a) Nervous system only b) Endocrine system only c) Both nervous and endocrine d) Neither
Blood pH is normally: a) 6.4 b) 7.4 c) 8.4 d) 9.4
Leukemia is: a) Cancer of WBCs b) Low RBC count c) High platelet count d) Blood clotting disorder
Anemia is characterized by: a) Low RBC count b) Low hemoglobin c) Reduced oxygen carrying capacity d) All of these
The Frank-Starling mechanism relates to: a) Heart rate b) Stroke volume c) Blood pressure d) Cardiac output
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