Simple and Double Circulation

Q.

Describe the process of double circulation in human beings with the help of a diagram. Why is double circulation necessary?

Q. Which of the following is the fibrous sac that surrounds the heart?

1. Peritoneum
2. Precordium
3. Pleura
4. Pericardium

Q.

Question 11
Describe double circulation in human beings. Why is it necessary?

Q.

What is blood pressure? Name the instrument used to measure it.

Q. Platelets are also called _____.

1. erythrocytes
2. leucocytes
3. megakaryocytes
4. thrombocytes

Q.

How does the blood flow during systemic circulation?

1. From lungs to body tissues and back to lungs.

2. From right auricle to body tissues and back to right ventricle.

3. From aorta to tissues of the body and back to the right auricle.

4. From left auricle to body tissues and back to left auricle.

Q.

What is meant by human circulatory system? What is meant by the term"single circulation" and "double circulation "

Q.

Explain double circulation .

Q. Normal blood pressure of an adult human is ______.

1. 120/80 mm Hg

2. 100/120 mm Hg

3. 100/80 mm Hg

4. 80/120 mm Hg

Q. The diagram shows a section through the human heart. ​Which blood vessels carry blood to and from the lungs?

1. Blood to lungs – 2 , blood from lungs - 4
2. Blood to lungs – 1 , blood from lungs - 4
3. Blood to lungs – 2 , blood from lungs - 3
4. Blood to lungs – 1 , blood from lungs - 3 ​

Q. Which is better -single circulation or double circulation? What is the need for the blood to go through the heart twice in humans ?

Q. What is double circulation and why it is necessary?

Q. Identify the features associated with hypertension.

1. High systolic pressure
2. Low diastolic pressure
3. High blood pressure than normal
4. More pressure on heart

Q. Why is blood circulation in human heart called double circulation?

1. Because the blood passes through the heart twice in one complete cycle of the body
2. Because the blood passes through the heart once in one complete cycle of the body
3. Because the blood passes through both arteries and veins
4. Because the blood passes through arteries, veins and capillaries

Q.

Which of the following is correct about the major role of the circulatory system?

1. To break down food so that it can be used by the body.

2. To provide a medium for transportation, elimination of waste and maintain homeostasis.

3. To help in the absorption of the digested food.

4. To give the body shape and support.

Q. Identify the correct statement regarding blood circulation.

1. The blood that is pumped by the heart after reaching the body parts does not return to the heart.
2. To keep the blood moving, the heart does not need to pump the blood continuously.
3. If blood flows through the heart twice for completing one circulation, it is called double circulation.
4. If the blood flows through the heart twice for completing one circulation, it is called single circulation.

Q.

Choose the schematic diagram which properly represents pulmonary circulation in humans:

1. Left ventricle (oxygenated blood) $\to$ Lungs $\to$ oxygenated blood $\to$ Right auricle

2. Right ventricle (oxygenated blood) $\to$ Lungs $\to$ deoxygenated blood $\to$ Aorta

3. Right ventricle (deoxygenated blood) $\to$ Lungs $\to$ oxygenated blood $\to$ Left auricle

4. Right ventricle (deoxygenated blood) $\to$ Lungs $\to$ oxygenated blood $\to$ Aorta

Q.

What is double circulation?

Q. In which stage of cardiac cycle does the first sharp sound of the heart can be heard?

1. Opening of the tricuspid valve or the bicuspid valve
2. Contraction of atria
3. Relaxation of atria
4. Contraction of ventricles

Q. An instrument that measures blood pressure is known as _______ .

1. thermometre
2. sphygmomanometre
3. stethoscope
4. anemometre

Q. Which of the following sequences is precisely a systemic circulation pathway?

1. Right atrium $\to$ Left ventricle $\to$ Aorta $\to$ Tissues $\to$ Veins $\to$ Right atrium
2. Left atrium $\to$ Left ventricle $\to$ Aorta $\to$ Tissues $\to$ Right atrium
3. Left ventricle $\to$ Aorta $\to$ Arteries $\to$ Tissues $\to$ Veins $\to$ Right atrium
4. Right ventricle $\to$ Aorta $\to$ Tissues

Q.

The pulmonary artery carries:

1. Deoxygenated blood to the brain

2. Deoxygenated blood to the lungs

3. Oxygenated blood to the brain

4. Oxygenated blood to the lungs

Q. In which stage of cardiac cycle does the first sharp sound of the heart can be heard?

1. Relaxation of atria
2. Contraction of ventricles
3. Relaxation of ventricles
4. Contraction of atria