Biology · General Awareness

Human Circulatory System

818 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 evolutionary changes in heart transportation - the circulatory system

Right atrium of rabbit receives

  1. Two anterior vena cava

  2. Two posterior vena cava

  3. One anterior and one posterior vena cava

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

Right atrium of the mammalian heart receives deoxygenated blood from anterior (superior) vena cava and posterior (inferior) vena cava. Thus, the right atrium has only deoxygenated blood. After systole, the deoxygenated blood from the right atrium goes to the lung for purification.

Multiple choice evolutionary changes in heart transportation - the circulatory system

Heart of fishes is

  1. Two chambered

  2. Venous heart

  3. Both of the above

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

All vertebrates possess a muscular chambered heart. Fishes have a 2-chambered heart with an atrium and a ventricle. 

In fishes, the heart pumps out deoxygenated blood, which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart (single circulation). Because the heart pumps deoxygenated blood in fishes, it is called as a venous heart.

Multiple choice evolutionary changes in heart transportation - the circulatory system

In rabbit, oxygenated blood flows from

  1. Left auricle to left ventricle during auricular systole

  2. Right auricle to right ventricle during ventricular systole

  3. Right ventricle to aorta during ventricular systole

  4. Pulmonary vein to left auricle during auricular systole
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The left part of the mammalian heart contains only oxygenated blood. During auricular diastole, the oxygenated blood from the lungs come into left auricle. During auricular systole, the oxygenated blood comes into left ventricle.

Multiple choice evolutionary changes in heart transportation - the circulatory system

Why four-chambered heart is beneficial?

  1. It increases blood pressure.

  2. It pumps blood to the lungs more often, so blood is better oxygenated.

  3. It separates oxygenated and deoxygenated blood.

  4. It lowers blood pressure and the threat of heart attacks.

  5. It supplies the brain with more blood for cognition.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the case of four-chambered heart, there are two atria and two ventricles. The type of blood circulation in such type of heart is called as double circulation, including pulmonary and systemic circulation. The blood enters twice through the heart in this cycle, which prevents the deoxygenated and the oxygenated blood from getting mixed and the circulation is maintained properly. 

Thus, the correct answer is option 'It separates oxygenated and deoxygenated blood'.

Multiple choice evolutionary changes in heart transportation - the circulatory system

The last structure to be reached by a tracer substance injected into a patient's superior vena cava before leaving heart is

  1. Right ventricle

  2. Left ventricle

  3. Pulmonary veins

  4. Left atrium

  5. Right atrium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pathway of the blood in the heart occurs in the following manner:

Vena Cava
Right Atrium
Right Ventricle
Pulmonary artery
Lungs
Pulmonary Vein
Left Atrium
Left Ventricle
Aorta
Body organs.
So, The blood actually leaves the heart after the left ventricle. If any tracers substance is injected into a patient's superior vena cava, it shall visit all the chambers and the last chamber to be visited before it finally leaves the heart will be left ventricle.
Hence, the correct answer is 'Left Ventricle'.

Multiple choice evolutionary changes in heart transportation - the circulatory system

In humans, blood vascular system has 

  1. Double circulation

  2. Venous heart

  3. Arterial heart

  4. Arteriovenous heart
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In humans, blood vascular system has Double circulation it means we have two loops in our body in which blood circulates. One is oxygenated blood and the other is deoxygenated blood. From the heart oxygenated blood is supplied to all over the body through systemic circulation and deoxygenated blood is sent to lungs for oxygenation through pulmonary veins.
So, the correct answer is 'Double circulation'.
Multiple choice evolutionary changes in heart transportation - the circulatory system

Both avian and mammalian hearts are four chambered. The anatomy and physiology of heart is described by

  1. Blood always enters into an atrium and then is pumped into a ventricle.

  2. Blood pressure alternates between systolic pressure and diastolic pressure.

  3. The atria provide one pump and the ventricles provide a second pump.

  4. The heart sends blood out through arteries and retrieves blood through veins.

  5. The heart pumps blood simultaneously through a pulmonary circuit and a systemic circuit.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Double circulation of blood is exhibited exclusively by mammals and aves as they have a four-chambered heart. it includes systemic and pulmonary circulation. Systemic circulation includes pumping of oxygenated blood to the whole body from heart and transport of deoxygenated blood from the body to heart for oxygenation. The pulmonary circuit includes pumping of deoxygenated blood from the heart to lung for oxygenation followed by its pumping to heart. This is how four chambered heart keeps oxygenated and deoxygenated blood separate via these two circulations. 

Therefore, the correct answer is option E.

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

The Pulmonary trunk and systemic aorta of Foetus, connected by?

  1. Ligamentum arteriosum

  2. Ductus arteriosus

  3. Ductus arteriosum

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

The ductus arteriosus acts as a shunt between the pulmonary artery and the aorta during fetal development. In the fetus, before returning to the body, the blood is oxygenated in the placenta. Amniotic fluid fills the lungs and can not therefore be used to oxygenate the blood. Rather, the arterioles in the lungs restrict the quantity of blood flow that can pass through.

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Which of the following structure is lacking from the placenta?

  1. Arteries

  2. Veins

  3. Smooth muscles

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

The placenta is an organ, that connects the fetus to the uterine wall. This allows the nutrient uptake, waste elimination and gas exchange via the mother's blood supply, fights against internal infection and produces hormones to support pregnancy. Placenta connects the fetus by an umbilical cord which contains two umbilical arteries and one umbilical vein. The placenta is encircled by a ring of smooth muscle cells.
The placenta does not have nerves.
Thus, the correct answer is option (D), 'Nerves'.

Multiple choice zoology breathing and respiration regulation of breathing human respiratory system contro and disorders of respiration

Carotid artery supplies 

  1. Oxygenated blood to lungs

  2. Oxygenated blood to intestine

  3. Oxygenated blood to brain

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

There are two types of the carotid artery; one in left and one in the right. The external carotid artery supplies blood to the face and neck whereas internal carotid artery supplies blood to the brain.


Therefore the right option is 'oxygenated blood to brain'.

Multiple choice zoology the respiratory system regulation of breathing human respiratory system contro and disorders of respiration

Oxygenated blood from lungs is carried to heart by.

  1. Pulmonary artery

  2. Pulmonary vein

  3. Coronary vein

  4. Pre-cavals
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pulmonary vein is unique because it carries oxygenated blood from the lungs back to the left atrium of the heart. The pulmonary artery carries deoxygenated blood away from the heart to the lungs.

Multiple choice evs the muscular system and digestive system in human beings human muscular system closer look into muscular system muscles and its types

Cori's cycle operates in

  1. Liver

  2. Muscles

  3. Blood

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Cori cycle (lactic acid cycle), refers to the metabolic pathway in which lactate produced by anaerobic glycolysis in the muscles moves to the liver and is converted to glucose, which then returns to the muscles and is metabolized back to lactate. 

Multiple choice evs circulation of blood blood transfusion transfusion of blood blood and organ donation

Pulse is a wave contraction transmitted along the

  1. Veins

  2. Arteries

  3. Both A and B

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

The arterial pulse is a measurement of the heart’s contraction rate because a pulse wave is created when the left ventricle contracts. The arteries expand in response to this contraction and increase in volume. Once expanded, the arteries will contract forcing blood to circulate to the capillaries and then to the veins. The arterial pulse is evaluated for the contour of the pulse wave and its volume, rate and rhythm. The carotid pulse is the most accurate reflection of central aortic pulse. Thus, option B is correct. 

Multiple choice evs circulation of blood blood transfusion transfusion of blood blood and organ donation

Pulse can be palpated from 

  1. Carotid artery

  2. Radial artery

  3. Femoral artery

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pulse is a pressure wave that travels through the arteries after each ventricular systole. The pulse can be felt in any artery that lies near the surface of the body. Carotid artery (neck region), radial artery (forearm) and femoral artery (legs) all of them are situated near the surface of the body. Thus pulse can be palpated from all of them.

So, the correct answer is option D.

Multiple choice evs safety and first aid antibiotics and their uses common health care methods first aid

In case of bleeding, .......... the affected part to minimise gravitational outflow of blood.

  1. Lower

  2. Raise

  3. Horizontal

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the case of bleeding, raise the affected part to minimize gravitational outflow of blood. Wash the cut surface with clean water, press the area with a piece of clean cotton wool, and if possible apply some mild antiseptic. Thus, the correct answer is option B.