NEET Biology Body Fluids and Circulation MCQs Set H

Question: Vagus nerve slows down heart beat due to secretion of ..

• a) Adrenaline
• b) Acetylcholine
• c) Norepinephrine
• d) Dopamine

Answer: Acetylcholine

Question: A blood group with no antibodies but with both antigens is

• a) O
• b) A
• c) B
• d) AB

Answer: AB

Question: AB blood group person has ..

• a) A and B antigens
• b) a and b antibody
• c) A antigen and antibody
• d) B antigen and a antibody

Answer: A and B antigens

Question: Q305) What is correct?

• a) Rabbit has renal portal system only
• b) Frog has renal portal system only
• c) Rabbit has both renal and hepatic systems
• d) Frog has both renal and hepatic portal systems

Answer: Frog has both renal and hepatic portal systems

Question: If blood pressure reads 140 systole and 90 diastole, the condition is called

• a) Hypertension
• b) Normal
• c) Hypotension
• d) Ischemia

Answer: Hypertension

Question: What is correct regarding blood pressure ...

• a) 105/50 mm Hg makes one very active
• b) 100/55 mmHg is considered an ideal blood pressure
• c) 190/110 mm Hg may harm vital organs like brain and kidneys
• d) 130/90 mmHg is considered as high and requires treatment.

Answer: 190/110 mm Hg may harm vital organs like brain and kidneys

Question: In a healthy adult man, the diastolic pressure is .

• a) 80 mmHg
• b) 90 mmHg
• c) 100 mmHg
• d) 120 mmHg

Answer: 80 mmHg

Question: Amount of blood pumped by heart into body per minute is ..

• a) Atrial output
• b) Ventricular output
• c) Cardiac output
• d) Stroke volume

Answer: Cardiac output

Question: In case of emergency ( e.g. serious accident with great blood loss) which blood group could be safely transfused .

• a) AB Rh^- 
• b) O Rh⁺
• c) AB Rh⁺ 
• d) O Rh^-

Answer: O Rh^-

Question: Systolic pressure is 120 mmHg. Diastolic pressure is 80 mmHg. Pulse pressure is .

• a) 120 ×80 = 9600 mmHg
• b) 120 + 80 = 200 mmHg
• c) 120 - 80 = 40 mmHg
• d) 120/80 = 1.5 mmHg

Answer: 120 - 80 = 40 mmHg

Question: Which one takes part in blood clotting ..

• a) RBC
• b) WBC
• c) Thrombocytes
• d) Lymphocytes

Answer: Thrombocytes

Question: Given below are four statements, a - d, regarding human blood circulatory system which are true statement (a) Arteries are thick-walled and have narrow lumen as compared to veins (b) Angina is acute chest pain when the blood circulation to brain is reduced. (c) Persons with blood group AB can donate blood to any person with any blood group under ABO system (d) Calcium ions play a very important role in blood clotting

• a) a and b
• b) a and d
• c) b and c
• d) c and d

Answer: a and d

Question: Collecting of WBCs at the site of injury occurs due to ..

• a) Phagocytosis
• b) Hemolysis
• c) Diapedesis
• d) All the above

Answer: Diapedesis

Question: Hepatic portal system starts from ..

• a) Digestive system to liver
• b) Kidney to liver
• c) Liver to heart
• d) Liver to kidney

Answer: Digestive system to liver

Question: Function of vertebral arteries is to supply ..

• a) Deoxygenated blood to kidneys
• b) Deoxygenated blood to liver
• c) Oxygenated blood to limbs
• d) Oxygenated blood to cerebellum

Answer: Oxygenated blood to cerebellum

Question: Lymph consists of .

• a) RBCs, WBCs and plasma
• b) RBCs, proteins and platelets
• c) All components of blood except RBCs and some proteins
• d) WBCs and serum

Answer: WBCs and serum

Question: In ECG, P-wave refers to ..

• a) End of atrial contraction
• b) Beginning of atrial contraction/depolarisation
• c) Beginning of ventricular contraction
• d) None of the above

Answer: Beginning of atrial contraction/depolarisation

Question: Blood capillaries are made of .

• a) Endothelium, connective tissue and muscle fibres
• b) Endothelium and muscle fibres
• c) Endothelium and connective tissue
• d) Endothelium only

Answer: Endothelium only

Question: Plasma proteins perform .

• a) Nutritive function
• b) Physicochemical function
• c) Transport function
• d) All the above

Answer: All the above

More Questions....................................

Question: Closed blood vascular system occurs in

• a) Earthworm
• b) Housefly
• c) Cockroach
• d) Euglena

Answer: Earthworm

Question: Second heart sound is associated with the

• a) Lub - closure of semilunar valves
• b) Lub - closure of tricuspid and bicuspid valves
• c) Dupp - closure of tricuspid and bicuspid valves
• d) Dupp - closure of tricuspid and bicuspid valves

Answer: Dupp - closure of tricuspid and bicuspid valves

Question: value of cardiac output is .

• a) Auricular volume × ventricular volume
• b) Stroke volume × Rate of heart beat
• c) Blood pumped in one minute
• d) Both B and C

Answer: Both B and C

Question: The value of diastolic blood pressure is .

• a) 120 mmHg
• b) 80 mmHg
• c) 120/80 mmHg
• d) 40 mmHg

Answer: 80 mmHg

Question: Impulse originating from SA node is transmitted to

• a) Pacemaker
• b) AV node
• c) Bundle of HIS
• d) Purkinje system

Answer: AV node

Question: Sympathetic nervous system

• a) Decreases heart beat
• b) Increases heart beat
• c) Not related to heart beat
• d) Controls heart beat

Answer: Increases heart beat

Question: High carboxyhaemoglobin content indicates that the patient has inhaled excessive

• a) Carbon disulfide
• b) Chloroform
• c) Carbon dioxide
• d) Carbon monoxide

Answer: Carbon monoxide

Question: Which one produces antibodies?

• a) Macrophages
• b) Plasma cells / Lymphocytes
• c) Mast cells
• d) Fibroblasts

Answer: Plasma cells / Lymphocytes

Question: Increase in count of RBC is .

• a) Polycythemia
• b) Leucocytopenia
• c) Anaemia
• d) Leucopenia

Answer: Polycythemia

Question: In leucopenia .

• a) Leucocytes increase above 6000
• b) Leucocytes decrease below 5000
• c) Bone marrow is destroyed
• d) Total number of lymphocytes decrease from 2% to 0.5%

Answer: Leucocytes decrease below 5000

Question: Which is used to prevent bleeding?

• a) Vitamin A
• b) Vitamin C
• c) Vitamin B₁₂ 
• d) Vitamin K

Answer: Vitamin K

Question: Human / mammalian/elephant heart is .

• a) Myogenic
• b) Neurogenic
• c) Cardiogenic
• d) Digenic

Answer: Myogenic

Question: Which one is odd combination ..

• a) Peyer's patches - Lymphatic gland
• b) Leydig cells - Testis
• c) HCl - Oxyntic cells
• d) Blood capillary wall - Connective tissue

Answer: Blood capillary wall - Connective tissue

Question: Bundle of His passes stimulus of concentration to .

• a) AV node
• b) SA node
• c) Purkinje fibres
• d) Atrium

Answer: Purkinje fibres

Question: What is correct about ECG? .

• a) P-depolarisation of atria
• b) R-repolarisation of ventricles
• c) T-start of systole
• d) T-end of diastole

Answer: P-depolarisation of atria

Question: Circulatory system is absent in

• a) Annelids
• b) Arthropods
• c) Flatworms
• d) Cephalopods

Answer: Flatworms

Question: Circulatory system does not help in

• a) Transport of gases
• b) Transport of nutrients
• c) Transport of hormones
• d) Passage of impulses

Answer: Passage of impulses

Question: A mismatch during transfer of blood causes

• a) Agglutination
• b) Erythroblastosis
• c) Haemopoiesis
• d) None of the above

Answer: Agglutination

Question: Lymph

• a) Transports O₂ to brain 
• b) Transports CO₂ to lungs 
• c) Returns interstitial fluid to blood
• d) Returns RBCs and WBCs to lymph nodes

Answer: Returns interstitial fluid to blood

Question: The disease erythroblastosis foetalis of human baby is due to ..

• a) Incompatibility of blood groups of the couple
• b) Incompatibility of blood group of embryo and mother
• c) Maladjustment of Rh factor
• d) All the above

Answer: Maladjustment of Rh factor

Question: Lymph nodes from

• a) Hormones
• b) Lymph
• c) Antigens
• d) Anti-bodies

Answer: Anti-bodies

Question: Artificial pacemaker is implanted subcutaneously for correcting .

• a) 90% blockage of coronary arteries
• b) High blood pressure
• c) Arteriosclerosis
• d) Irregularity of heart rhythm

Answer: Irregularity of heart rhythm

Question:  Although blood carries a lot of CO₂, it does not become acidic due to 

• a) CO₂ combines with water to form H₂CO₃ which nutralises by Na₂CO₃ 
• b) In CO₂ transport blood buffers play an important part 
• c) CO₂ is absorbed by leucocytes 
• d) CO₂ continuously diffuses through tissues and does not accumulate.

Answer: In CO₂ transport blood buffers play an important part 

Question: Which one indicates hypertension .

• a) 140/100
• b) 120/85
• c) 110/70
• d) 90/60

Answer: 140/100

Question: Louder sound of heart beat occurs during closure of .

• a) Tricuspid valve
• b) Auriculo-ventricular valves
• c) Mitral valve
• d) Semilunar valve

Answer: Auriculo-ventricular valves

Question: If liver is removed, the component that increases in blood

• a) Protein
• b) Urea
• c) Uric acid
• d) Ammonia

Answer: Ammonia

Question: Iron is attached to globin part of haemoglobin by .

• a) Coordinate bond
• b) Ionic bond
• c) Covalent bond
• d) Hydrogen bond

Answer: Coordinate bond

Question: Cardiac impulse that accomplishes heart beat is delayed at .

• a) Internodal tracts
• b) AV node
• c) Bundle of His
• d) Purkinje fibres

Answer: AV node

Question: The genotype of B-group father of and mother O-group child is .

• a) I^OI^O 
• b) I^BI^B
• c) I^AI^B 
• d)  I^BI^O

Answer:  I^BI^O

Question: Even during vigorous exercise, the blood supply does not increase in case of .

• a) Heart
• b) Brain
• c) Kidney
• d) Skin

Answer: Brain

Question: Mitochondria are absent in .

• a) WBC
• b) Cartilage
• c) RBC
• d) All the above

Answer: RBC

Question: Pericardial fluid is secreted by .

• a) Myocardium
• b) Parietal peritoneum
• c) Visceral peritoneum
• d) None of the above

Answer: Visceral peritoneum

Question: In circulatory system, valves occur in

• a) Heart and blood vessels of both vertebrates and invertebrates as well as vertebrate lymphatic
• b) Both vertebrate and invertebrate hearts
• c) Vertebrate heart only
• d) Both vertebrate and invertebrate hearts and their blood vessels

Answer: Heart and blood vessels of both vertebrates and invertebrates as well as vertebrate lymphatic

Question: All veins have deoxygenated blood except

• a) renal artery
• b) hepatic vein
• c) hepatic portal vein
• d) pulmonary veins

Answer: pulmonary veins

Question: Which is blood of genotypes I^BI^B and I^BI^O

• a) O
• b) A
• c) B
• d) AB

Answer: B

Question: Enteroheptic circulation is related to____

• a) Bile ducts
• b) Bile pigment
• c) Cholesterol
• d) Cholecystokinin

Answer: Cholecystokinin

Question: Purkinje fibres arise from .

• a) Apex of ventricles
• b) Middle of ventricles
• c) Anterior part of auricles
• d) Posterior part of auricles

Answer: Middle of ventricles

Question: At the time of diastole, heart is filled with____

• a) Mixed blood
• b) Venous blood
• c) Deoxygenated blood
• d) Oxygenated blood

Answer: Venous blood

Question: Choose the correct blood supply____

• a) 10% heart, 10% brain, 10% liver, 40% kidney, 15% bones, 15% other
• b) 5% heart, 20% brain, 20% liver, 15% kidney, 5% bones, 4% other
• c) 5% heart, 25% brain, 25% liver, 25% kidney, 5% bones, 15% other
• d) 20% heart, 10% brain, 10% liver, 25% kidney, 10% bones, 25% other

Answer: 5% heart, 25% brain, 25% liver, 25% kidney, 5% bones, 15% other

Question: pH of blood in arteries and veins is____

• a) Higher in arteries and lower in veins
• b) Higher in veins and lower in arteries
• c) Same
• d) Variable in both

Answer: Higher in arteries and lower in veins

Question: Splenic artery arises from_____

• a) Anterior mesenteric artery
• b) Coeliac artery
• c) Posterior mesenteric artery
• d) Intestinal artery

Answer: Coeliac artery