ATI RN
Cardiovascular System Multiple Choice Questions Questions
Question 1 of 5
Identify the vessel that carries blood to the left atrium.
Correct Answer: C
Rationale: The pulmonary veins (C) carry oxygenated blood from the lungs to the left atrium. The aorta (A) carries blood from the left ventricle, pulmonary artery (B) from the right ventricle to lungs, and superior vena cava (D) to the right atrium.
Question 2 of 5
The cardiac control center (cardioregulatory center) is located in the
Correct Answer: C
Rationale: The cardioregulatory center in the medulla oblongata (C) controls heart rate via autonomic signals. The atrium (A) has the SA node, hypothalamus (B) regulates other functions, and carotid artery (D) has baroreceptors.
Question 3 of 5
The fluid that surrounds the cells of the body is called:
Correct Answer: D
Rationale: Tissue fluid (D), or interstitial fluid, surrounds cells, derived from plasma (C) leaking from capillaries. Blood (A) is in vessels, lymph (B) is in lymphatic vessels.
Question 4 of 5
The respiratory pump ___ the pressure difference between the abdominal region and the thoracic region thus leading to a(n) ___ in venous return.
Correct Answer: D
Rationale: The respiratory pump increases the thoracoabdominal pressure gradient (D) during inspiration (low thoracic pressure), enhancing venous return to the heart.
Question 5 of 5
Identify the vessels that branch off the aortic arch.
Correct Answer: A
Rationale: The aortic arch branches into the brachiocephalic, left common carotid, and left subclavian arteries (A). B is descending aorta, C are veins, D is ascending aorta.