Cardiovascular System Quiz: Test Your Knowledge of the Circulatory System

Question 1

Which blood vessels carry oxygenated blood away from the heart?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Lymphatic vessels

Question 2

What is the muscular layer of the heart called?

Accepted Answer

Myocardium

Answer

Endocardium

Answer

Pericardium

Answer

Epicardium

Question 3

Which of the following factors does NOT decrease heart rate?

Accepted Answer

Stress

Answer

Rest

Answer

Sleep

Answer

Meditation

Question 4

What is the primary neurotransmitter released by sympathetic nerves that increases heart rate?

Accepted Answer

Noradrenaline

Answer

Dopamine

Answer

Serotonin

Answer

Acetylcholine

Question 5

Which of the following blood cells contains haemoglobin for carrying oxygen?

Accepted Answer

Red blood cells

Answer

White blood cells

Answer

Platelets

Answer

Plasma

Question 6

What is the term for the build-up of fatty deposits in artery walls?

Accepted Answer

Atherosclerosis

Answer

Hypertension

Answer

Aneurysm

Answer

Thrombosis

Question 7

Which chamber of the heart receives oxygenated blood from the lungs?

Accepted Answer

Left atrium

Answer

Right atrium

Answer

Left ventricle

Answer

Right ventricle

Question 8

Which of the following blood vessels carries oxygenated blood away from the heart to the rest of the body?

Accepted Answer

Aorta

Answer

Carotid artery

Answer

Pulmonary artery

Answer

Femoral artery

Question 9

Which type of blood vessel has the thickest muscular walls?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Venules

Question 10

What is the primary function of hemoglobin in the blood?

Accepted Answer

To transport oxygen

Answer

To regulate blood pressure

Answer

To prevent blood clots

Answer

To fight infections

Question 11

During exercise, which factor primarily increases the rate at which the heart beats?

Accepted Answer

Increased sympathetic nervous system activity

Answer

Increased blood pressure

Answer

Increased body temperature

Answer

Increased blood sugar levels

Question 12

What is the term for the volume of blood pumped out of the heart per beat?

Accepted Answer

Stroke volume

Answer

Cardiac output

Answer

Blood pressure

Answer

Heart rate

Question 13

Which blood vessel type transports blood away from the heart?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Lymphatics

Question 14

Identify the structure responsible for initiating the heartbeat within the heart.

Accepted Answer

Sinoatrial node

Answer

Atrioventricular node

Answer

Purkinje fibers

Answer

Bundle of His

Question 15

Describe the primary function of capillaries in the circulatory system.

Accepted Answer

Exchange of oxygen and carbon dioxide with tissues

Answer

Transportation of blood to the heart

Answer

Regulation of blood pressure

Answer

Production of red blood cells

Question 16

Identify the condition characterized by the heart's inability to pump blood effectively.

Accepted Answer

Heart failure

Answer

Myocardial infarction

Answer

Atherosclerosis

Answer

Arrhythmia

Question 17

How does regular exercise impact stroke volume?

Accepted Answer

Increases stroke volume

Answer

Decreases stroke volume

Answer

Has no effect on stroke volume

Answer

Increases stroke volume initially but decreases it over time

Question 18

Which of the following is a common symptom experienced during angina?

Accepted Answer

Chest pain

Answer

Shortness of breath

Answer

Nausea

Answer

Fatigue

Question 19

Which of the following is not a primary function of the cardiovascular system?

Accepted Answer

Producing hormones

Answer

Transporting nutrients and oxygen to cells

Answer

Removing waste products from cells

Answer

Regulating body temperature

Question 20

The human heart is divided into how many chambers?

Accepted Answer

4

Answer

2

Answer

3

Answer

5

Question 21

Which type of blood vessel carries oxygenated blood away from the heart?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Lymph vessels

Question 22

What is the term for the rhythmic contraction and relaxation of the heart?

Accepted Answer

Cardiac cycle

Answer

Cardiac output

Answer

Electrocardiogram

Answer

Cardiac arrest

Question 23

What is the primary role of haemoglobin in the cardiovascular system?

Accepted Answer

To transport oxygen

Answer

To transport carbon dioxide

Answer

To regulate blood pressure

Answer

To fight infection

Question 24

What is the primary purpose of an electrocardiogram (ECG)?

Accepted Answer

To measure heart rate and rhythm

Answer

To detect heart defects

Answer

To monitor blood pressure

Answer

To measure oxygen levels in the blood

Question 25

Which of the following is NOT a primary function of the cardiovascular system?

Accepted Answer

Storing red blood cells

Answer

Transporting oxygen and nutrients to tissues

Answer

Removing waste products

Answer

Maintaining body temperature

Question 26

Which type of blood vessel carries oxygenated blood away from the heart?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Venules

Question 27

What is the name of the phase of the cardiac cycle when the ventricles relax and fill with blood?

Accepted Answer

Diastole

Answer

Systole

Answer

Isovolumetric contraction

Answer

Isovolumetric relaxation

Question 28

Which hormone is released by the adrenal glands to increase heart rate and stroke volume during exercise?

Accepted Answer

Epinephrine (adrenaline)

Answer

Norepinephrine (noradrenaline)

Answer

Dopamine

Answer

Serotonin

Question 29

Explain how the cardiovascular system contributes to maintaining body temperature during exercise.

Accepted Answer

The cardiovascular system increases blood flow to the skin, allowing excess heat to be released through radiation and conduction.

Answer

The cardiovascular system decreases blood flow to the skin, reducing heat loss and maintaining body temperature.

Answer

The cardiovascular system increases heart rate, which pumps more blood throughout the body, aiding in thermoregulation.

Answer

The cardiovascular system decreases blood pressure, allowing blood to flow more easily through the body and facilitate thermoregulation.

Question 30

What is NOT a component of blood plasma?

Accepted Answer

Hemoglobin

Answer

Water

Answer

Proteins

Answer

Electrolytes

Question 31

Which of the following blood vessels carries oxygenated blood away from the heart?

Accepted Answer

Arteries

Answer

Veins

Answer

Vena cava

Answer

Capillaries

Question 32

What is the main function of the atrioventricular valves?

Accepted Answer

To prevent backflow of blood into the atria during ventricular contraction

Answer

To prevent backflow of blood into the veins during ventricular relaxation

Answer

To regulate the flow of blood from the ventricles to the arteries

Answer

To maintain a constant heart rate

Question 33

Which of the following factors is the primary cause of an increase in heart rate during exercise?

Accepted Answer

Increased sympathetic nervous system activity

Answer

Increased resistance in the arteries

Answer

Increased parasympathetic nervous system activity

Answer

Decreased venous return

Question 34

What is the primary role of hemoglobin in red blood cells?

Accepted Answer

To transport oxygen

Answer

To transport carbon dioxide

Answer

To regulate blood pH

Answer

To prevent blood clots

Question 35

What is the name of the condition in which plaque builds up inside the arteries, narrowing them?

Accepted Answer

Atherosclerosis

Answer

Hypertension

Answer

Angina

Answer

Coronary heart disease

Question 36

Which of the following is a known risk factor for cardiovascular disease?

Accepted Answer

Smoking

Answer

Adhering to a balanced diet

Answer

Regular exercise

Answer

Maintaining a normal weight

Question 37

What part of the heart is responsible for initiating and coordinating the heartbeat?

Accepted Answer

Sinoatrial node (SA node)

Answer

Bundle of His

Answer

Atrioventricular node (AV node)

Answer

Purkinje fibers

Question 38

Which of the following measurements represents the volume of blood pumped out of the heart per minute?

Accepted Answer

Cardiac output

Answer

Blood pressure

Answer

Heart rate

Answer

Stroke volume

Question 39

What is the primary function of the coronary arteries?

Accepted Answer

To supply blood to the heart muscle

Answer

To supply blood to the lungs

Answer

To supply blood to the kidneys

Answer

To supply blood to the brain