Biology · General Awareness

Human Circulatory System

846 Questions

The human circulatory system explores the network of blood vessels, heart valves, and structural pathways. Test items often target blood flow sequences and specific vascular functions. Mastering these details is vital for biology preparation.

Heart valves and chambersBlood vessels and venulesArteries of the bodyBlood supply to organsCentral nervous system supply

Human Circulatory System Questions

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

Which chamber of the human heart pumps fully oxygenated blood to the aorta and hence to the body?

  1. Right auricle

  2. Left auricle

  3. Right ventricle

  4. Left ventricle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The left ventricle is the thick-walled chamber responsible for pumping oxygenated blood into the aorta, which then distributes it throughout the systemic circulation. The right side of the heart handles deoxygenated blood.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

If the radius of the blood vessel decreases, the blood pressure will ________.

  1. increase

  2. decrease

  3. remains same

  4. increases in male but decreases in female
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to the principles of fluid dynamics, as the radius of a blood vessel decreases (vasoconstriction), the resistance to blood flow increases. To maintain flow, the blood pressure must increase.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

What is the name of the vessel that delivers the nutrient rich blood from the stomach and small intestine to the liver?

  1. Left hepatic artery

  2. Hepatic vein

  3. Right hepatic artery

  4. Hepatic portal vein
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The hepatic portal vein is a unique vessel that carries nutrient-rich, deoxygenated blood from the gastrointestinal tract and spleen directly to the liver for processing before it enters the systemic circulation.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

With reference to blood in a normal person, which one of the following statements is correct?

  1. Compared to arteries, veins are less in number and hold less of the body's blood at any given time

  2. Blood cells constitute about 70% of the total volume of the blood

  3. White Blood Cells (WBC) are made by lymph nodes only

  4. Blood has more platelets than WBCs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Platelets are significantly more numerous in human blood than white blood cells. WBC counts are typically in the thousands per microliter, while platelet counts are in the hundreds of thousands.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

Consider the following statements:
1. Arteries carry pure oxygenated blood from the heart to body tissues.
2. The pulmonary artery carries deoxygenated blood.
3. Veins carry deoxygenated blood from body tissues towards the heart.
4. Pulmonary vein carries oxygenated blood.
Which of the statements given above are correct?

  1. 1 and 2

  2. 1 , 2 and 3

  3. 2 , 3 and 4

  4. 1, 2 , 3 and 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All statements are correct. Arteries generally carry oxygenated blood away from the heart, except for the pulmonary artery. Veins generally carry deoxygenated blood toward the heart, except for the pulmonary vein.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

Which of the following statement/s is/are correct?
1. Coronary artery supplies blood to heart muscles.
2. Pulmonary vein supplies blood to lungs.
3. Hepatic artery supplies blood to kidneys.
4. Renal vein supplies blood to kidneys.

  1. 1 , 2 and 3

  2. Only 1

  3. 2 and 4

  4. 1 , 3 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coronary arteries supply the heart muscle. Pulmonary veins carry oxygenated blood from the lungs to the heart. Hepatic arteries supply the liver, not the kidneys (renal arteries do that). Renal veins drain the kidneys.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

Consider the following statements: 
1. The force that blood exerts force against the wall of a vessel is called blood pressure. 
2. The pressure of blood inside the artery during contraction is called systolic pressure and pressure in an artery during relaxation is called diastolic pressure. 
3. Blood pressure is measured with an instrument called sphygmomanometer.
Which of the statements given above are correct?

  1. 1 and 2

  2. 1 and 3

  3. 2 and 3

  4. 1 , 2 and 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All statements are accurate. Blood pressure is the force against vessel walls; systolic/diastolic pressures correspond to heart contraction/relaxation; and the sphygmomanometer is the standard clinical tool for measurement.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

Which of the following disease is caused when plaque blocks the arteries which supply blood to the heart?

  1. Coronary heart disease

  2. Haemophilia

  3. Arthritis

  4. Leukemia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coronary artery disease develops when the major blood vessels that supply our heart with blood, oxygen, and nutrients become damaged or diseased. The disease is caused when plaque blocks the arteries which supply blood to the heart.

Multiple choice business studies tourism development in rajasthan tourism and transportation transportation in rajasthan tour and travel management

Blood veins of a region is ________________.

  1. Transportation

  2. Industry

  3. Agriculture

  4. Communication
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transportation is the movement of people, goods and animals from one place to another. Transport is important because it enables trade between people, which is essential for the development of civilizations. Transportation helps in improving bonds between people and to know whereabouts of other places. For the socio economic development of any region and development of basic infrastructure transportation is important. Because of all the above reasons Transportation is called the blood veins of a region.

Multiple choice biology control and coordination in living organisms hormones coordination in human beings- chemical control endocrine system in humans

Which one of the following flows directly into blood from the site of its production to act on an organ away from it?

  1. Enzyme

  2. Hormone

  3. Blood

  4. Lymph
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The hormone is a regulatory substance produced in an organism and transported in tissue fluids, such as blood or sap to stimulate specific cells or tissues into action. Usually, it is a class of signaling molecules, produced by glands in multicellular organisms, that are transported by the circulatory system to target distant organs to regulate physiology and behaviour.

Multiple choice evs science of kitchen balanced diet and malnutrition assimilation of food components and importance of food skeletal system and muscles assimilation of food and egestion busy at work - our internal organs

Which of the following are swollen veins in anus or rectum, causing severe pain?

  1. Ulcer

  2. Hemorrhoids

  3. Intestinal cysts

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Haemorrhoids which is commonly known as piles occurs due to the swelling of veins in anus or rectum. 

Its symptoms include:-
  • Painless bleeding in the stool.
  • Itching and irritation around your anal part.
  • Swelling and discomfort in that area.
So, the correct option is 'Hemorrhoids'.

Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Which of the following statements are correct?


(i) $Ca^{+2}$ is necessary for blood coagulation.
(ii)Coagulation in blood vessel is prevented during normal condition by heparin.
(iii)Clotting of blood involves changes of fibrinogen to fibrin by thrombin.
(iv)Blood clotting involves cascading process involving a number of factors present always in the active form.

  1. (i), (iii) and (iv)

  2. (ii) and (iv)

  3. (i) and (iii)

  4. (iii) and (iv)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ca${+2}$ is necessary for blood coagulation -

1. Conversion of prothrombin to thrombin, in presence of prothrombin activator and Ca${+2)$
2. Conversion of fibrinogen monomers in to fibrin fibres  
III fibrinogen is thin soluable protein that is converted to insoluable protein fibres by thrombin
So, the correct answer is 'i and iii'