Question 1

Which layer of a typical blood vessel is primarily responsible for vasoconstriction and vasodilation, and what is the main tissue type found in this layer?

Accepted Answer

Tunica media; composed mainly of smooth muscle

Question 2

A patient is diagnosed with a blockage in the left pulmonary artery. Which chamber of the heart will have difficulty sending deoxygenated blood to the lungs as a result?

Accepted Answer

Right ventricle

Question 3

Which of the following best describes the difference between arteries and veins?

Accepted Answer

Arteries have thicker tunica media and higher pressure than veins

Question 4

Which structure is responsible for initiating the electrical impulse that triggers the heartbeat, and what is its typical location?

Accepted Answer

Sinoatrial (SA) node; located in the right atrium

Question 5

A blood sample is analyzed and found to contain 55% plasma and 45% formed elements. Which of the following best describes the composition of the formed elements?

Accepted Answer

Red blood cells, white blood cells, and platelets

Question 6

Which of the following correctly ranks the abundance of white blood cell types in normal blood, using the mnemonic 'Never Let Monkeys Eat Bananas'?

Accepted Answer

Neutrophils \u003e Lymphocytes \u003e Monocytes \u003e Eosinophils \u003e Basophils

Question 7

During ventricular systole, which heart valves are open and which are closed?

Accepted Answer

Atrioventricular valves closed; semilunar valves open

Question 8

Which of the following best explains why the left ventricle has a thicker wall than the right ventricle?

Accepted Answer

It pumps blood to the entire systemic circulation, requiring higher pressure

Question 9

A patient suffers a myocardial infarction that damages the papillary muscles. Which of the following complications is most likely to occur as a result?

Accepted Answer

Incompetence of the atrioventricular valves leading to regurgitation

Question 10

Which of the following is a granulocyte and what is its primary function?

Accepted Answer

Neutrophil; first responder to bacterial infection

Question 11

Which vessel supplies blood directly to the kidneys?

Accepted Answer

Renal artery

Question 12

Which of the following best describes the flow of blood through the heart starting from the right atrium?

Accepted Answer

Right atrium → right ventricle → pulmonary artery → lungs → left atrium → left ventricle → aorta

Question 13

Which of the following is the correct sequence of electrical conduction in the heart?

Accepted Answer

SA node → AV node → Bundle of His → Right and Left bundle branches → Purkinje fibers

Question 14

Which of the following best describes the function of the chordae tendineae?

Accepted Answer

Prevent inversion of the atrioventricular valves during ventricular contraction

Question 15

Which of the following is NOT a major lymphatic organ?

Accepted Answer

Liver

Question 16

A patient has a clotting disorder due to a deficiency in platelets. Which process is most directly impaired?

Accepted Answer

Hemostasis

Question 17

Which wave on an electrocardiogram (ECG) corresponds to ventricular depolarization?

Accepted Answer

QRS complex

Question 18

Which vessel returns deoxygenated blood from the lower body to the right atrium?

Accepted Answer

Inferior vena cava

Question 19

Which of the following best describes the difference in function between red blood cells (RBCs) and white blood cells (WBCs)?

Accepted Answer

RBCs transport oxygen; WBCs are involved in immune defense

Question 20

Which of the following is a characteristic unique to veins compared to arteries?

Accepted Answer

Presence of valves to prevent backflow

Cardiovascular and Lymphatic System Study Guide: Anatomy & Physiology

Guida di studio - Domande di pratica

Study guide - Flashcard