14 Flashcards
What is the primary function of the circulatory system?
A) Transport nutrients and oxygen
B) Regulate body temperature
C) Facilitate digestion
D) Support immune function
Answer: A) Transport nutrients and oxygen
What is the largest artery in the body?
A) Pulmonary artery
B) Aorta
C) Femoral artery
D) Coronary artery
Answer: B) Aorta
Which part of the heart is responsible for pumping oxygenated blood to the body?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Answer: D) Left ventricle
What type of blood vessels carry blood away from the heart?
A) Veins
B) Capillaries
C) Arteries
D) Venules
Answer: C) Arteries
What is the role of red blood cells?
A) Fight infections
B) Clot blood
C) Transport oxygen
D) Regulate blood pressure
Answer: C) Transport oxygen
Which component of blood is primarily responsible for clotting?
A) Plasma
B) Red blood cells
C) White blood cells
D) Platelets
Answer: D) Platelets
What is the primary function of the right atrium?
A) Pump oxygenated blood to the lungs
B) Receive deoxygenated blood from the body
C) Regulate heart rate
D) Pump oxygenated blood to the body
Answer: B) Receive deoxygenated blood from the body
Which blood vessels are involved in nutrient and gas exchange?
A) Arteries
B) Veins
C) Capillaries
D) Lymphatics
Answer: C) Capillaries
What is the function of the valves in the heart?
A) Prevent backflow of blood
B) Increase blood pressure
C) Pump blood
D) Produce hormones
Answer: A) Prevent backflow of blood
What is the normal resting heart rate for adults?
A) 40-60 beats per minute
B) 60-100 beats per minute
C) 100-120 beats per minute
D) 120-140 beats per minute
Answer: B) 60-100 beats per minute
Which blood type is known as the universal donor?
A) A+
B) AB-
C) O-
D) B+
Answer: C) O-
What is the main purpose of the pulmonary circulation?
A) Deliver oxygen to body tissues
B) Remove carbon dioxide from the body
C) Pump blood to the digestive organs
D) Supply blood to the heart
Answer: B) Remove carbon dioxide from the body
What is the primary function of the aorta?
A) Receive deoxygenated blood
B) Pump blood to the lungs
C) Distribute oxygenated blood to the body
D) Filter blood
Answer: C) Distribute oxygenated blood to the body
What is the role of the coronary arteries?
A) Supply blood to the brain
B) Supply blood to the lungs
C) Supply blood to the heart muscle
D) Remove waste from the body
Answer: C) Supply blood to the heart muscle
Which type of blood vessel carries deoxygenated blood?
A) Pulmonary veins
B) Arteries
C) Aorta
D) Pulmonary arteries
Answer: D) Pulmonary arteries
What is the function of plasma in the blood?
A) Carry oxygen
B) Fight infections
C) Transport nutrients, hormones, and waste
D) Clot blood
Answer: C) Transport nutrients, hormones, and waste
What part of the heart initiates the electrical impulses that control the heartbeat?
A) Atrioventricular (AV) node
B) Sinoatrial (SA) node
C) Bundle of His
D) Purkinje fibers
Answer: B) Sinoatrial (SA) node
What is hypertension?
A) Low blood pressure
B) High blood pressure
C) Irregular heartbeats
D) Hardening of the arteries
Answer: B) High blood pressure
Which blood component is primarily involved in immune response?
A) Red blood cells
B) Plasma
C) White blood cells
D) Platelets
Answer: C) White blood cells
What is the main role of the left atrium?
A) Pump blood to the lungs
B) Receive oxygenated blood from the lungs
C) Pump deoxygenated blood to the body
D) Control heart rate
Answer: B) Receive oxygenated blood from the lungs
What can result from blockages in the coronary arteries?
A) Stroke
B) Heart attack
C) Hypertension
D) Arrhythmia
Answer: B) Heart attack
Which condition is characterized by the thickening and stiffening of arterial walls?
A) Atherosclerosis
B) Arrhythmia
C) Bradycardia
D) Anemia
Answer: A) Atherosclerosis
What is the primary function of the valves in veins?
A) Prevent backflow of blood
B) Increase blood flow
C) Decrease blood pressure
D) Store blood
Answer: A) Prevent backflow of blood
Which chamber of the heart has the thickest walls?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Answer: D) Left ventricle
What is the role of the spleen in the circulatory system?
A) Pump blood
B) Filter blood and produce lymphocytes
C) Produce hormones
D) Store oxygen
Answer: B) Filter blood and produce lymphocytes
What is the effect of adrenaline on the circulatory system?
A) Slows heart rate
B) Increases heart rate and blood flow
C) Decreases blood pressure
D) Enhances digestion
Answer: B) Increases heart rate and blood flow
What is the function of the jugular veins?
A) Carry oxygenated blood from the heart
B) Carry deoxygenated blood from the brain to the heart
C) Supply blood to the lungs
D) Filter blood
Answer: B) Carry deoxygenated blood from the brain to the heart
What is the average blood volume in an adult human?
A) 2-3 liters
B) 4-6 liters
C) 7-9 liters
D) 10-12 liters
Answer: B) 4-6 liters
Which type of blood vessel is typically the smallest in diameter?
A) Arteries
B) Capillaries
C) Veins
D) Arterioles
Answer: B) Capillaries
What role does the heart play in the circulatory system?
A) Filters blood
B) Produces red blood cells
C) Pumps blood throughout the body
D) Regulates hormones
Answer: C) Pumps blood throughout the body
