Quiz about Biology IGCSE Topic 9.1

Question 1

What is the main function of the circulatory system?

Accepted Answer

B) To transport blood and nutrients throughout the body

Answer

A) To regulate body temperature

Answer

C) To produce hormones

Answer

D) To support muscle movement

Question 2

Which of the following statements about the circulatory systems of fish and mammals is correct?

Accepted Answer

C) Fish have a two-chambered heart and single circulation, while mammals have a four-chambered heart and double circulation.

Answer

A) Both fish and mammals have a four-chambered heart

Answer

B) Fish have a four-chambered heart, while mammals have a two-chambered heart.

Answer

D) Fish have a single circulation, while mammals have a single circulation.

Question 3

What is the structure of the mammalian heart?

Accepted Answer

C) Four chambers: two atria and two ventricles

Answer

A) Two chambers: atrium and ventricle

Answer

B) Three chambers: two atria and one ventricle

Answer

D) Five chambers: three atria and two ventricles

Question 4

How can the activity of the heart be monitored?

Accepted Answer

B) By using an electrocardiogram (ECG)

Answer

A) By measuring body temperature

Answer

C) By checking blood pressure

Answer

D) By monitoring brain waves

Question 5

What is coronary heart disease primarily caused by?

Accepted Answer

B) Blockage of coronary arteries by fatty deposits

Answer

A) High blood sugar levels

Answer

C) Inflammation of the heart muscle

Answer

D) Abnormal heart rhythms

Question 6

Which blood vessels carry blood away from the heart?

Accepted Answer

C) Arteries

Answer

<ul><li>A) Veins</li></ul>

Answer

B) Capillaries

Answer

<ul><li>D) Venules</li></ul>

Question 7

What are platelets primarily responsible for in the blood?

Accepted Answer

B) Blood clotting

Answer

A) Transporting oxygen

Answer

C) Fighting infection

Answer

D) Carrying nutrients

Question 8

What is the main function of red blood cells?

Accepted Answer

C) Transporting oxygen

Answer

A) Producing antibodies

Answer

B) Fighting infection

Answer

D) Promoting blood clotting

Question 9

Which blood vessel type has the thickest muscular walls to withstand high pressure?

Accepted Answer

A) Arteries

Answer

<ul><li>B) Veins</li></ul>

Answer

C) Capillaries

Answer

<ul><li>D) Venules</li></ul>

Question 10

What is the primary function of white blood cells?

Accepted Answer

C) Fighting infection

Answer

A) Carrying oxygen

Answer

B) Clotting blood

Answer

D) Transporting nutrients

Question 11

Which chamber of the mammalian heart receives deoxygenated blood from the body?

Accepted Answer

A) Right atrium

Answer

B) Left atrium

Answer

C) Right ventricle

Answer

D) Left ventricle

Question 12

What is the main function of valves in the heart?

Accepted Answer

B) To control the flow of blood

Answer

A) To regulate blood pressure

Answer

C) To produce hormones

Answer

D) To synthesize nutrients

Question 13

Which blood vessel carries blood away from the heart to the lungs for oxygenation?

Accepted Answer

A) Pulmonary artery

Answer

B) Pulmonary vein

Answer

<ul><li>C) Aorta</li></ul>

Answer

D) Vena cava

Question 14

What is the purpose of measuring pulse rate during physical activity?

Accepted Answer

D) To determine heart rate

Answer

A) To monitor blood pressure

Answer

B) To assess lung capacity

Answer

C) To measure the efficiency of digestion

Question 15

How do arteries differ from veins in terms of structure?

Accepted Answer

B) Arteries have thinner walls and carry oxygenated blood.

Answer

A) Arteries have thicker walls and carry deoxygenated blood.

Answer

C) Veins have thicker walls and carry oxygenated blood.

Answer

D) Veins have thinner walls and carry deoxygenated blood.

Question 16

What is the function of capillaries in the circulatory system?

Accepted Answer

C) To exchange nutrients and gases with tissues

Answer

A) To carry blood away from the heart

Answer

B) To regulate blood pressure

Answer

D) To pump blood throughout the body

Question 17

Which component of blood is responsible for carrying oxygen from the lungs to the rest of the body?

Accepted Answer

A) Red blood cells

Answer

B) White blood cells

Answer

C) Platelets

Answer

<ul><li>D) Plasma</li></ul>

Question 18

What is the primary function of white blood cells in the immune system?

Accepted Answer

C) To fight infection

Answer

A) To transport oxygen

Answer

B) To produce hormones

Answer

D) To regulate blood pressure

Question 19

Which blood vessel type has valves to prevent the backflow of blood?

Accepted Answer

<ul><li>B) Veins</li></ul>

Answer

A) Arteries

Answer

C) Capillaries

Answer

<ul><li>D) Venules</li></ul>

Question 20

What is the function of platelets in the process of blood clotting?

Accepted Answer

D) To form clots and stop bleeding

Answer

A) To transport oxygen

Answer

B) To fight infection

Answer

C) To promote inflammation

Question 21

What is the function of the lymphatic system in the body?

Accepted Answer

C) To fight infection and remove toxins

Answer

A) To regulate body temperature

Answer

B) To transport oxygen throughout the body

Answer

D) To support digestion

Question 22

Which blood vessel carries oxygenated blood from the lungs to the heart?

Accepted Answer

B) Pulmonary vein

Answer

A) Pulmonary artery

Answer

<ul><li>C) Aorta</li></ul>

Answer

D) Vena cava

Question 23

What is the role of hemoglobin in red blood cells?

Accepted Answer

B) To transport oxygen

Answer

A) To fight infection

Answer

C) To regulate blood pressure

Answer

D) To produce hormones

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