Double Circulation

Q.

What is double circulation?

Q. Describe the mechanism of circulation of blood?

Q.

What are the main functions of the cardiovascular system?

Q.

What is meant by double circulation? What is its significance?

Q. Discuss the transport of gases in the blood

Q. Systemic circulation is defined as the

1. flow of oxygenated blood from the ascending aorta to the heart muscle and the return of deoxygenated blood from the heart muscle to the right atrium
2. flow of deoxygenated blood from the right ventricle to the lungs and the return of oxygenated blood from the lungs to the left atrium
3. flow of oxygenated blood from left ventricle to all parts of the body and the return of deoxygenated blood from various body parts to the right atrium
4. flow of deoxygenated blood from the digestive organs to the liver before returning to the heart

Q.

Write the differences between :
Open and Closed system of circulation

Q.

Describe the events in cardiac cycle. Explain 'double circulation'.

Q. Which of the following statements are incorrect about the veins?
Statement1: Veins usually carry oxygenated blood.
Statement2: Veins carry blood from different organs of the body to the heart.
Statement3: Pulmonary vein is the only exception as it carries deoxygenated blood.

1. Statement 1 and 2 are incorrect
2. Statement 2 and 3 are incorrect
3. Statement 1 and 3 are incorrect
4. All the statements are incorrect

Q. The movement of blood between heart and lungs is called_____________

1. pulmonary circulation
2. systemic circulation
3. double circulation
4. coronary circulation

Q. What is pulmonary circulation ?

Q. Pulmonary artery carries _________________ blood to __________________

1. oxygenated blood, the heart
2. oxygenated blood, body parts
3. deoxygenated blood, the lungs
4. deoxygenated blood, body parts

Q. Choose the correct option which properly represents pulmonary circulation in humans.

1. Right Ventricle $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Left Auricle
2. Right Ventricle $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Left Auricle
3. Left Auricle $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Right Ventricle
4. Left Auricle $\underset{\text{Blood}}{\overset{\text{Deoxygenated}}{\to }}$ Lungs $\underset{\text{Blood}}{\overset{\text{Oxygenated}}{\to }}$ Right Ventricle

Q. Which of the following options represent correct blood flow pathway in pulmonary circulation?

1. Right ventricle $\underset{Artery}{\overset{Pulmonary}{\to }}$ Lung $\underset{Vein}{\overset{Pulmonary}{\to }}$ Right atrium
   
2. Left ventricle $\stackrel{Aorta}{\to }$ Body $\stackrel{Vena-Cava}{\to }$ Right atrium
3. Right ventricle $\underset{Vein}{\overset{Pulmonary}{\to }}$ Lung $\underset{Artery}{\overset{Pulmonary}{\to }}$ Right atrium
   
4. Right ventricle $\underset{Artery}{\overset{Pulmonary}{\to }}$ Lung $\underset{Vein}{\overset{Pulmonary}{\to }}$ Left atrium
   

Q.

________ chambered heart helps in the separation of the right side and the left side of the heart and is useful in mammals and birds.

1. 2

2. 4

3. 6

4. none of these

Q. Differentiate between the pulmonary circulation and systemic circulation.

Q. Which of the following statement(s) wrong with regard to heart?
A. Left atrium receives deoxygenated blood from different parts of the body while right atrium receives deoxygenated blood from the lungs.
B. Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.
C. Left atrium receives oxygenated blood from lungs while left ventricle pumps oxygenated blood to different parts of the body.
D. Pulmonary vein carries deoxygenated blood to the lungs and pulmonary artery brings oxygenated blood towards the heart.

1. A and C
2. C only
3. Both A and D
4. D only

Q. Describe the coronary circulation.

Q. The accompanying diagram shows the three stages in the cardiac cycle.


Which of the following is the correct sequence?

1. B, A, C
2. B, C, A
3. C, A, B
4. C, B, A

Q. Describe pulmonary and systemic circulation.

Q. If the tricuspid valve fails to open, then

1. blood could not enter the pulmonary veins, therefore, it could not reach the lungs
2. blood could not enter the pulmonary artery, therefore, it could not reach the heart
3. blood could not enter the pulmonary veins, therefore, it could not reach the heart
4. blood could not enter the pulmonary artery, therefore, it could not reach the lungs

Q. The partial pressure of $C{O}_2$ in the venous blood is-

1. Greater than the tissue spaces
2. Lesser than in the arterial blood
3. Lesser than in the tissue spaces
4. Less than in alveoli

Q.

How many times will a red blood corpuscle have to pass through the heart in its journey from hepatic artery to the aorta?

1. Only once

2. Two times

3. Four times

4. Several times

Q. Which of the following is true for anatomical dead space?

1. Its volume is 500 ml
2. It represents the volume of air from respiratory bronchioles to alveolus that do not take part in exchange of gases due to inadequate blood supply
3. It represents the volume of air from nostril to terminal bronchioles that do not take part in exchange of gases due to incompetent tissue
4. All are true

Q. What are the functions of?
$\to$ Pulmonary veins
$\to$ Pulmonary arteries
$\to$ Aorta
$\to$ Septum

Q. Given below is a diagrammatic representation of a certain part of the process of circulation of blood in man. Study the same and then answer the questions that follows ​



\((iii)\) Draw a neat, labelled diagram of the cross sectional view of the blood vessel numbered \(C​\).

Q. Which of the following matches correctly?

1. Inferior vena cava - receives deoxygenated blood from the head and body
2. Superior vena cava - receives deoxygenated blood from the lower body and organs
3. Pulmonary artery - carries deoxygenated blood to the lungs
4. Hepatic artery carries oxygenated blood to the liver

Q.

Name the following:

A blood vessel that carries de-oxygenated blood from the body to the heart.

Q.

Which of the following matches correctly?

1. Pulmonary artery - Carries deoxygenated blood to the lungs

2. Superior vena cava - Receives deoxygenated blood from the lower body and organs

3. Inferior vena cava - Receives deoxygenated blood from the head and body

4. Hepatic artery - Carries deoxygenated blood to the gut

Q. Mention the locations from where to where do the following blood vessels carry blood?

(i) Hepatic vein