NEET Daily Practice Papers - Biology - Animal Circulatory System
215 Questions/Answers
In rabbit, the four chambered heart promotes
Answer:
Explanation:
An open circulatory system occurs in
Which of the following lack muscles
Post caval in right auricle is guarded by
Blood vessels that contain valves are called
Match the blood vessels of human heart listed under Column-I with the functions given under Column-II; Choose the answer which gives the correct combination of the alphabets of the two columns
Bundle of HIS is found in
Tricuspid valve is present in
Pace maker of the heart is
Blood returns from lungs to heart through
Covering of heart is called
Chordae tendinae are found in
The middle layer of heart is known as
Which one of the following doctors performed the first heart transplant
AV node in the heart of man is
Neurogenic heart is characteristic of
Bicuspid valve is also called as
An adult human with average health has systolic and diastolic pressures as
Chemical nature of antibody is
A four chambered heart is not found in
Myogenic heart is found in
Arteries are
Innominate is
Which one of the following is not related to the clotting of blood
If blood cells are eliminated from the blood, the liquid left is
The blood returning to the heart from lungs via pulmonary vein has more
Systemic heart refers to
The nerve like modified muscle in the right auricle is known as
The first heart sound is
If heart of a mammal was injected with 2% CaCl2 solution, then
In the heart of mammal the bicuspid valve is situated between
The auriculo-ventricular node in human heart was discovered by
The heart of a healthy man beats normally per minute
Nature of valves in the heart is
Since it is the sinu-auricular node which initiates the impulses in the heart of mammal is called
Systolic pressure is higher than diastolic pressure because
In man, blood passes from the post caval into the diastolic right atrium of the heart because of
The murmuring sound in heart takes place due to
Heart beat can be initiated by
The beating of heart of man is heared on the left side because
What is the maximum efficiency of heart?
Which of the following cardiac effects can be observed if the potassium concentration is increased two to three times the normal value?
Histology of heart superficially shows the following structure except
Rouget cells surround the walls of
The ion that always keeps the cardiac muscle unit in contracting state is
First heart sound occurs at
Apex beat of heart is synchronous with
Wenckebach phenomenon is seen in
Starling's law is related to
What is the approximate number of capillaries in human body?
All followings are vasoconstrictor agents except
Oxygen–fick method is used to measure
Which one is the correct route through which pulse making impulse travels in the heart?
Purkinje fibre is found in
Which of the following structure is absent in rabbit's heart?
Which of the following statements is false?
The pace–setter in the heart is called
Largest heart is found in
Average cardiac output is
Pacemaker is one that influences the
Valves are necessary in veins but not in arteries because
Mitral valve in mammals guards the opening between
The coronary sinus in the heart is situated along its
Tunica media of an elastic artery is made up of mainly
Putting adrenaline on the heart will cause the heart beat to
The wall of heart is made up of
Heart beats are affected by
Heart beat originates from
The thickening of walls of arteries are called
Which of the following is different from others in absence of muscular coat
The sinu-auricular valve occurs
Blood to the heart is brought by the venous system by
The post-caval is constituted by
The pre-caval vein is formed of
The post-caval vein collects blood from
The pre-caval veins collect blood from
The two branches of the iliac artery are
The unpaired systemic branch is
The shoulder and fore limb are connected to the heart by
Inter-auricular septum in the embryonic stages has a/an
Bundle of His is a network of
Which is correct about veins
How many lateral hearts are in Pheretima
What is correct about sinus venosus
In amphibia, the heart has
Atherosclerosis refers to the ailment of
In rabbit oxygenated blood flows from
Pulmonary artery drains the deoxygenated blood from
Impulse originating from sinu-atrial node are transmitted to the
Below normal heart beat is called
Heart of elephant is
Thoracic duct in humans is associated with
The heart of fish is different from the other group because
The blood vascular system of mammals is known as double vascular system because
In connection with circulatory system, valves are present
The circulation of blood was discovered by
Which of the following is the correct statement about the circulatory system of cockroach
Open vascular system is found in
Select the animals having open type of circulatory system
Mammals are said to have a "double circulatory system''. This means
The heart of a crocodile consists of
In man artificial pacemaker is implanted due to defects in
Which one of the following is a matching pair
In the evolution of animals a heart to pump the blood is found for the first time in
Purkinje's fibres of the vertebrate heart are modified
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
In which one of the following pairs the two items mean one and the same thing
The chamber of human heart, which has thickest wall
Cardiac output is determined by
Spiral valve is present in
‘Heart of Heart’ is
Human heart is enclosed in a double walled sac called
Which one of the following vein breaks up into capillaries
Serotonin in the blood
The artery can be distinguished from the vein in having
The pulse beat is measured by the
Carotid artery carries
Blood vessels carrying blood from lungs to heart
The artery which supplies blood to the diaphragm is known as
Iliac artery carries blood to the
The number of red blood corpuscles (RBC) in adult human males per mm³ of blood is approximately:
Hemoglobin imparts the red color to blood due to the presence of:
Which among the following is the largest white blood cell?
Clotting of blood in a test tube can be prevented by the addition of:
Which vitamin is essential for the synthesis of prothrombin?
Which blood group is called the universal donor?
Which blood component helps in the transport of carbon dioxide?
Normal life span of human RBC is:
The blood vessel that carries oxygenated blood from lungs to heart is:
The buffy coat observed after centrifuging blood contains:
Leucopenia refers to:
Which of the following has the highest concentration of urea?
The human heart is covered by a double-walled membrane called:
Which of the following initiates and maintains the heartbeat?
Which blood vessel has the lowest blood pressure?
Erythropoietin is mainly produced in:
A person with blood group A can receive blood from:
The yellow color of plasma is mainly due to:
Normal human blood pH is:
Antigen-antibody reactions are the basis of:
Which of the following is the correct statement about the circulatory system of cockroach?
Open vascular system is found in
Select the animals having open type of circulatory system: (i) Ascidia (ii) Cockroach (iii) Earthworm (iv) Prawn (v) Silver fish (vi) Snail (vii) Squid
Mammals are said to have a 'double circulatory system'. This means
The heart of a crocodile consists of
In man artificial pacemaker is implanted due to defects in
Which one of the following is a matching pair?
In the evolution of animals a heart to pump the blood is found for the first time in
Purkinje's fibres of the vertebrate heart are modified
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
In which one of the following pairs the two items mean one and the same thing?
The chamber of human heart, which has thickest wall
Cardiac output is determined by
Spiral valve is present in
‘Heart of Heart’ is
Human heart is enclosed in a double walled sac called
Which one of the following vein breaks up into capillaries
Serotonin in the blood
The artery can be distinguished from the vein in having
The pulse beat is measured by the
Heart beats are affected by
Heart beat originates from
The thickening of walls of arteries are called
Which of the following is different from others in absence of muscular coat
The sinu-auricular valve occurs
Blood to the heart is brought by the venous system by
The post-caval is constituted by
The pre-caval vein is formed of
The post-caval vein collects blood from
The pre-caval veins collect blood from
The two branches of the iliac artery are
The unpaired systemic branch is
The shoulder and fore limb are connected to the heart by
Inter-auricular septum in the embryonic stages has a/an
Bundle of His is a network of
Which is correct about veins
How many lateral hearts are in Pheretima
What is correct about sinus venosus
In amphibia, the heart has
Atherosclerosis refers to the ailment of
Blood is
When blood of one person is mixed with the serum of another person then in certain cases, clumping of RBCs takes place. The clumping is due to
In rabbit, function of spleen is
The process of formation of the various types of blood cells is known as
In haemoglobin iron is present in
The number of RBC's in man increases if he lives at a higher altitude; this is because
Venous system of frog differs from that of rabbit in presence of
Although much CO2 is carried in the blood, yet blood does not become acidic. This is because
To which organ does femoral artery supply blood
Valves are found in veins to check the backflow of blood flowing under
The amount of blood supplied to brain per minute is
The heart beat increases at the time of interview due to
An artificial pacemaker is implanted subcutaneously and connected to the heart in patients
Plethysomograph is used to measure
Systole refers to the contraction of
Assertion: Heart valves resemble swing doors in action. Reason: Valves are present in the heart chamber, at the opening of the heart into large arteries and veins.
Assertion: Closed circulatory system is more effective than open type. Reason: The closed circulatory system considerably enhances the speed, precision and efficiency of circulation.
Assertion: Cardiac output rises during exercise. Reason: Cardiac output helps in less oxygen consumption.
Assertion: EEG is of immense diagnostic value in the cardiac diseases. Reason: Defects in cardiac functions can be reflected in changes in the pattern of electrical potentials recorded in the EEG.
Assertion: An artificial pacemaker can replace the sinoatrial node of heart. Reason: This is because, an artificial pacemaker is capable of stimulating the heart electrically to maintain its beats.
Blood of Periplaneta does not carry oxygen because
A vein differs from the artery in having
Diameter of capillaries for RBC to pass should be
pH of blood in artery and vein is
Largest blood vessel in body is
All arteries carry oxygenated blood except
Choose the correct proportion with respect to the distribution of blood in the body of man.
Which of the following blood vessels in mammals normally carry largest amount of urea
Which artery is absent in frog
Heart beats are controlled by a nodal tissue which is composed of
Mixing up of arterial and venous blood does not take place in a heart having
When the right ventricle contracts the blood goes into
Trilobed valve present between right atrium and ventricle in mammalian heart is
Stimulation of the vagus nerve will make the heart beat
The rate of heart beat per minute is highest in case of
Publish Year
August 2025
Last Update
August 18, 2025
Language
English
Level
expert
Total Questions
215
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