Study "HAP CARDIO MEDIUM", a flashcard deck on FORKSAI.
Which of the following correctly defines the circulatory system?
A. The circulatory system is the cardiovascular system combined with the lymphatic system, primarily functioning to transport oxygen, nutrients, hormones, and remove waste products.
What is the primary function of red blood cells within the cardiovascular system?
A. Red blood cells are primarily responsible for oxygen transport throughout the body, delivering it to tissues and organs.
Which blood vessel type is characterized by its one-cell thick wall and serves as the main site for exchange of O2/nutrients out and CO2/waste in?
C. Capillaries are one-cell thick, very narrow, and are the primary sites for the exchange of substances between blood and tissues.
Vasoconstriction of arterioles leads to which of the following outcomes?
A. Vasoconstriction, the narrowing of arterioles, results in fewer deliveries of blood to the tissue, controlling blood flow.
At the arteriole end of a capillary bed, what process is primarily occurring due to high pressure?
B. Filtration occurs at the arteriole end due to high pressure, pushing fluid, oxygen, glucose, and ions out into the tissues.
Which of the following body systems is responsible for producing blood cells, demonstrating a link with the cardiovascular system?
C. The skeletal system, specifically bone marrow, is responsible for producing blood cells, linking it to the cardiovascular system.
Where is the heart primarily located within the thoracic cavity?
B. The heart is located in the mediastinum, which is the central thoracic cavity, behind and slightly to the left of the sternum, between the lungs.
Which heart chamber receives deoxygenated blood from the upper body via the superior vena cava?
A. The right atrium receives deoxygenated blood from the upper body through the superior vena cava.
The Left Anterior Descending (LAD) artery is a branch of which major coronary artery?
B. The Left Anterior Descending (LAD) artery is a division of the Left Coronary Artery (LCA), supplying the front of the heart and the interventricular septum.
What is the natural pacemaker of the heart, initiating electrical impulses?
A. The SA node (sinoatrial node) located in the right atrium is the natural pacemaker of the heart, firing 70-80 impulses per minute.