Which blood vessels carry oxygen-rich blood away from the heart?
Veins
Capillaries
Arteries
Venules
#2
What is the primary function of veins in the circulatory system?
Carry oxygen-rich blood to the heart
Carry deoxygenated blood away from the heart
Exchange gases with tissues
Regulate blood pressure
#3
Which blood vessel carries deoxygenated blood from the heart to the lungs?
Pulmonary artery
Pulmonary vein
Aorta
Inferior vena cava
#4
What is the name of the condition characterized by the accumulation of fluid in the interstitial spaces, leading to swelling?
Edema
Embolism
Thrombosis
Ischemia
#5
What is the term for the condition characterized by an irregular heartbeat?
Tachycardia
Bradycardia
Arrhythmia
Fibrillation
#6
Which of the following substances is primarily responsible for the formation of blood clots?
Platelets
Hemoglobin
Red blood cells
White blood cells
#7
Which of the following is NOT a major risk factor for cardiovascular disease?
Obesity
High cholesterol levels
Regular exercise
Smoking
#8
What is the term for the measurement of pressure exerted by circulating blood upon the walls of blood vessels?
Cardiac output
Hypotension
Blood pressure
Hematocrit
#9
What is the main function of the endothelium in blood vessels?
Regulate blood pressure
Conduct electrical impulses
Facilitate gas exchange
Maintain vascular tone and integrity
#10
Which hormone plays a key role in regulating blood pressure by acting on the kidneys and blood vessels?
Insulin
Adrenaline
Aldosterone
Thyroxine
#11
What is the term for the condition characterized by the accumulation of fatty deposits in the walls of arteries?
Atherosclerosis
Thrombosis
Embolism
Arrhythmia
#12
Which of the following is NOT a major risk factor for developing hypertension?
High salt intake
Regular exercise
Obesity
Family history of hypertension
#13
Which of the following is a characteristic of arterioles?
Thick walls with elastic fibers
Small diameter and high resistance to blood flow
Thin walls with one-way valves
Large lumen for blood storage
#14
What is the name of the phenomenon where blood pressure decreases as blood flows away from the heart due to the resistance encountered in the blood vessels?