NEET MCQs Body Fluids and Circulation

Which of the following blood vessels in the circulatory system of frog has more deoxygenated blood?
a) Pulmonary artery b) Precaval veins
c) Pulmocutaneous artery d) Pulmocutaneous vein
Which one indicates hypertension or high blood pressure (BP)
a) 120/80 b) 110/70 c) 130/80 d) 140/90
Identify the correct statement
I. The impulse of the heart beat originates from SAN
II. Rate of the heart is determined by SAN
III. Bundle of His/AV bundle is present in the interventricular septum
IV. Atrio Ventricular Node (AVN) is situated in the lower left corner of the right auricle
Choose the correct option
a) All except II b) All except I c) All except III d) All of these
Choose the correct pathway on the transmission of impulse in the heart beat.
a) AV-node → SA-node → Bundle of His → Purkinje fibres
b) SA-node → AV-node → Bundle of His → Purkinje fibres
c) SA-node → Bundle of His → AV-node → Purkinje fibres
d) AV-node → Bundle of His → SA-node → Purkinje fibres
Water circulatory system in found in
I. 𝑆𝑝𝑜𝑛𝑔𝑒 II. 𝐻𝑦𝑑𝑟𝑎
III. Annelida IV. Starfish
V. Arthropoda
Choose the correct option
a) I, II and III b) III, IV and V c) I, II and IV d) II, IV and V
Which of the following is an example of buffer system in blood?
a) Haemoglobin and oxyhaemoglobin b) Oxygen and carbon dioxide
c) Albumin and globulin d) Sodium bicarbonate and carbonic acid
In an open circulatory system,
a) There is no distinction between the blood and the tissue fluid
b) Of tissue fluid is absent
c) No need of blood vessels
d) Open space or sinuses are absent
Primary blood cells are formed in
a) Plasma b) Bone marrow c) Liver d) Spleen
Properties of leucocytes are
I. they are nucleated
II. they are denucleated like RBC
III. they are 6000-8000 mm−3 of blood
IV. they are long lived
V. they are short lived
Choose the appropriate option with correct properties
a) I, III and V b) II, IV and V c) I, IV and V d) I, III and V
SAN can generate impulses

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a) 70 – 75 min−1 b) 50 – 55 min−1 c) 100 – 150 min−1 d) 35– 40 min−1

Haematuria means
a) RBCs in the urine b) WBCs in the urine c) Both (a) and (b) d) None of these
An oval depression called fossa ovalis, is seen on
a) Inter-atrial septum b) Inter-ventricular septum
c) Right-auriculo-ventricular septum d) Left auriculo-ventricular septum
Which of the following acts as ‘middle man of the body’?
a) Plasma b) Lymph c) RBCs d) RBCs
Coronary heart disease is due to
a) 𝑆𝑡𝑟𝑒𝑝𝑡𝑜𝑐𝑜𝑐𝑐𝑖 bacteria b) Inflammation of pericardium
c) Weakening of the heart valves d) Insufficient blood supply to the heart muscles
Pulse beat is measured from
a) Arteries b) Veins c) Capillaries d) Nerves
Which of the following is incorrect?
a) Heart is endodermal in origin
b) Human heart is situated in the between the two lungs slightly tilted to left
c) Heart is a double walled membranous bag
d) Human heart has two atria and two ventricles
Lymphatic system is an elaborated network of vessels which collect the
a) Interstitial fluid b) Intrastitial fluid c) Plasma fluid d) Protein fluid
In human heart, identify the correct statements a
I. Volume of both the atria is the greater than the volume and both ventricles
II. Volume of both the ventricle is greater than the volume of both the atria
III. Inter-ventricular septum separates the right and the left atria
IV. Atrio ventricular septum don’t separates the atrium and ventricle
Choose the correct option accordingly
a) All except I b) All except II c) All except III d) All except IV
SAN generates an action potential which stimulates both the …A… to undergo a simultaneous contraction
called …B… . This increases the flow of the blood into the ventricles by about …C… percentage
Choose the correct option for A, B and C
a) A-atria, B-asterial systole, C-30 b) A-ventricle, B-asterial systole, C-30
c) A-atria, B-ventricular diastole, C-30 d) A-atria, B-asterial diastole, C-30
The normal percentage of glucose in the blood of man is 0.1%. it is found in
a) Plasma b) RBCs c) WBCs d) Serum
Systemic heart refers to
a) Enteric heart in lower vertebrates
b) The two ventricles together in humans
c) The heart that contracts under stimulation from nervous system
d) Left auricle and left ventricle in higher vertebrates
Which of the following can be considered as the blood bank of human body?
a) Spleen b) Heart c) Liver d) Lungs
Coagulation of blood in blood vessels in living body is prevented by
a) Prothrombin b) Heparin
c) Prothrombin and calcium together d) Plasminogen and calcium together
Characteristic of open circulatory system
I. Blood flows in the open tissue space, the sinuses
II. Blood is in direct contact with the tissues cells
III. Blood flow is slow
IV. Blood pressure is high
Choose the option with characteristics

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a) All except II b) All except I c) All except III d) All except IV

In a healthy adult man the normal diastolic pressure is
a) 90 mm Hg b) 120 mm Hg c) 80 mm Hg d) 100 mm Hg
Which of the following carries glucose from digestive tract to liver?
a) Hepatic artery b) Hepatic portal vein c) Pulmonary vein d) None of these
When the balloon of nitre-aortic balloon pump inflates, more blood is carried to
a) Coronary artery b) Pulmonary trunk c) Hepatic portal d) Pulmonary arteries
Clotting disorders occur mainly due to the reduction in the number of
a) Granulocytes b) RBC c) WBC d) Platelets
Which one of the following is a matching pair of a certain body feature and its value/count in a normal
human adult?
a) Urea – 5 – 10 mg/100 mL of blood
b) Blood sugar – 70 – 100 mg/100 mL
(fasting)
c) Total blood volume – 5 – 6
d) ESR in Wintrobe – 9 – 15 mm in males and
20 – 34 mm in females
Which of the following are erythropoietic organs?
I. liver
II. lymph node
III. spleen
IV. white bone marrow
V. red bone marrow
Choose the correct option
a) All except I b) All except II c) All except I d) All except IV
Prothrombin is
a) Formed in liver b) Formed by vitamins
c) Changed to thrombin by prothrominase d) All of the above
Spiral valve is present in
a) Right auricle b) Sinus venosus c) Right ventricle d) Truncus arteriosus
Choose the correct statements regarding the human blood
I. The volume of the blood in an adult is 5 L
II. It constitutes 30-35% of the total extracellular fluid
III. Glucose concentration in the blood is 50mg/100 mL
IV. Cholesterol concentration in the blood is 30 mg/100 mL
V. Urea level in the blood is 10 mg/100 mL
The option with correct statements is
a) I, II and III b) III, IV and V c) IV and V d) I and II
A doctor suggested not to have more than one child to a couple because
a) Male is Rh+ and female is Rh− b) Male is Rh− and female is Rh+
c) Male is Rh− and female is Rh− d) Male is Rh+ and female is Rh−
Leucocytes are colourless due to
a) Lack of water b) Lack of haemoglobin
c) Presence of extra water d) Presence of haemoglobin
When two atria contract simultaneously and results in the blood pumping into ventricles, this is called
a) Arterial diastole b) Arterial systole c) Ventricular diastole d) Ventricular systole
In haemoglobin, which amino acid acts as blood buffer?
a) Histidine b) Glutamine c) Aspartic d) Lysine
Identify 𝐴 and 𝐵 in the given graph and choose the correct option accordingly

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a) A-Lungs; B-Liver b) A-Lungs; B-Tissue c) A-Tissue; B-Lungs d) A-Kidney; B-Liver

Double circulation is
a) Passage of blood twice in heart through the same way
b) Passage of blood twice in heart through the unique way
c) Passage of blood twice in heart through the separate way
d) None of the above
Atrial diastole takes place when
a) Right atrium is filled with blood b) Left atrium is filled with blood
c) Both atriums are filled with blood d) Both ventricles are filled with blood
Find out the wrong match
a) Eosinophils – Allergic response
b) Basophils – Secrete histamine and serotonin
c) Neutrophils – Phagocytic and destroy foreign organisms
d) Monocytes – Secrete heparin
Select the lymphoid organs from the given choices
I. Lymph node II. Thymus gland
III. Red bone marrow IV. liver
V. Spleen VI. Osteocytes
VII. Peyer’s patches
The correct option with correct choices is
a) I, II, III and IV b) III, IV, V and VI c) IV, V, VI and VII d) I, II, IV, V and VII
Exchange of gases, nutrient, etc., between the blood and the cells takes place through
a) RBC b) WBC c) Interstitial fluid d) Intrastitial fluid
Formed elements present in the human blood are
I. erythrocytes II. leucocytes
III. platelets IV. plasma
V. plasma
Chooses the correct option
a) I, II and III b) II, III and IV c) III, IV and V d) I, II, III, IV and V
The opening of auricles and ventricles on the right side is guarded by
a) Tricuspid valve b) Bicuspid valve c) Semilunar valve d) Eustachian tube
In humans, RBCs are formed in
a) Red bone marrow b) Heart
c) Lungs d) Yellow bone marrow
In frog’s heart, there are cardiac muscles, which consists of fibres called
a) Purkinje fibres b) Myonemes c) Telodendria d) Columnae carnae
Bicuspid valves are found in between
a) Right ventricle and right auricle b) Right ventricle and left auricle
c) Left ventricle and left auricle d) Right ventricle and left auricle
Among the following stem cells, which are found in the umbilical cord?
a) Embryonic stem cells b) Adult stem cells
c) Cord blood stem cells d) All of these
Congestion of the lungs is one of the main symptoms in

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a) Hypotension b) Coronary artery disease
c) Angina d) Heart failure

ECG is a graphical representation of the electric activity of the heart during
a) Cardiac systole b) Cardiac diastole
c) Cardiac cycle d) Ventricular and atrial diastole
Which is correct for artery?
a) Thick-walled in which blood flows at high pressure
b) Thin-walled and blood flow with low pressure
c) Thick-walled and blood flow with low pressure
d) None of the above
Human blood consists of
a) Fluid matrix b) Plasma c) Formed elements d) All of the above
Identify wheather the given statements are true or false for double circulation
I. It checks the mixing of oxygenated and deoxygenated blood
II. It carries only oxygenated blood
Choose the correct option accordingly
a) I-False, II-False b) I-True, II-True c) II-False, True d) II-True, False
I. Neutrophils II. Eosinophils
III. Basophils IV. Lymphocytes
V. Monocytes
Identify wheather the given cell types are granulocytes (A) and agranulocytes (B) and choose the correct
option accordingly
A B
a) I,II,III IV,V b) I,III,IV II,V
c) IV,V I,II,III d) II,V I,III,IV
To obtain a standard ECG, the patient is connected to the machine with three electrical leads. These three
electrical lead are connected as one each to the
a) Biceps and third one at the ankle b) Triceps and third one at the ankle
c) Thigh and third one at the ankle d) Wrist and third one at the ankle
Properties of human RBCs are
I. devoid of nucleus
II. formed in bone marrow
III. possess healing properties
IV. biconcave in shape
V. help in blood clotting
Choose the option with correct properties
a) I, II and III b) I, II and IV c) III, IV and V d) III, II and IV
Erythrocytes of adult rabbit and other mammals are formed in
a) Liver b) Spleen c) Kidney d) Red bone marrow
In given diagram which one is vena cava? a) A b) B c) C d) D
The following are the branches of dorsal aorta
I. Intercostal
II. Phrenic

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III. Coeliac
IV. Anterior mesenteric
V. Posterior mesenteric
Of these which set of arteries supply the blood to the glands of digestive system?
a) I and II b) III and IV c) IV and V d) II and III

Heart beat increases by
a) Adrenal hormones b) Sympathetic nerves
c) Both (a) and (b) d) Parasympathetic nerve
Which of the following statement (s) is/are incorrect?
I. The AV node and the bundle of His constitute, the electrical link between the atria and the ventricles
II. The bundle of His is a bundle of electrical nodes which allows the ventricles to contract
III. The bundle of His is a group of fibres that carry the electrical impulses through the centre of the heart
IV. The bundle of His is located in the artrial region
Choose the correct option
a) II, III and IV b) I, III and IV c) I, II and IV d) I, II and III
When thromboplastin is released in humans?
a) During hypertension b) By the traumatised cell at the place of injury
c) In the condition of erythroblastosis foetalis d) During anaemia
Blood pressure is controlled by
a) Adrenal b) Thyroid c) Thymus d) Corpus luteum
Atherosclerosis is called
a) Coronary artery disease b) Angina
c) Heart failure d) Hypertension
Haemoglobin is
a) An oxygen carrier in human blood b) A protein used as food supplement
c) An oxygen scavenger in root nodules d) A plant protein with high lysine content
In a healthy adult man, the normal diastolic pressure is
a) 90 mm Hg b) 120 mm Hg c) 80 mm Hg d) 100 mm Hg
You are required to draw blood from patient and to keep it in a test tube for analysis of blood corpuscles
and plasma. You are also provided with the following four types of test tubes.
Which of them will you not use for the purpose?
a) Test tube containing calcium bicarbonate b) Chilled test tube
c) Test tube containing heparin d) Test tube containing sodium oxalate
During ventricular systole
a) Oxygenated blood is pumped into the pulmonary artery and deoxygenated blood is pumped into the
artery
b) Oxygenated blood is pumped into the aorta and deoxygenated blood is pumped into the pulmonary vein
c) Oxygenated blood is pumped into the pulmonary vein and deoxygenated blood is pumped into the
pulmonary artery
d) Oxygenated blood is pumped into the aorta and deoxygenated blood is pumped into the pulmonary
artery
Pacemaker in heart is situated
a) In the wall of left atrium b) In the wall of right atrium
c) On inter-auricular septum d) On inter-ventricular septum
Duration of cardiac cycle (≅∙88 s)
I. Atrial systole → …A… sec.
II. Atrial diastole → …B… sec.
III. Ventricular systole → …C… sec.
IV. Ventricular diastole → …D… sec.
Total time = ≅ ∙ 88 sec

Choose the correct option for A, B, C and D
a) A-0.32, B-0.30, C-0.08, D-0.18
b) A-0.32, B-0.08, C-0.30, D-0.18
c) A-0.18, B-0.08, C-0.30, D-0.32
d) A-0.18, B-0.30, C-0.08, D-0.32

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