Q: Which equation correctly calculates pulse pressure?

Pulse Pressure = Systolic Pressure - Diastolic Pressure $$\text{Pulse Pressure} = \text{Systolic Pressure} - \text{Diastolic Pressure}$$

Question 1

Which of the following best explains why the left ventricular wall is thicker than the right ventricular wall?

Accepted Answer

It must generate higher pressure to pump blood throughout the entire body.

Question 2

A patient with sickle-cell anemia is experiencing a sickling episode after hiking at high altitude. Which factor most likely triggered this event?

Accepted Answer

Low oxygen levels causing hemoglobin S to polymerize.

Question 3

During ventricular ejection in the cardiac cycle, which valves are open and which are closed?

Accepted Answer

Semilunar valves are open; atrioventricular (AV) valves are closed.

Question 4

Which of the following is the correct sequence for the transmission of an action potential through the heart’s conduction system?

Accepted Answer

Sinoatrial (SA) node → Atrial conducting fibers → Atrioventricular (AV) node → AV bundle (Bundle of His) → Right and left bundle branches → Purkinje fibers

Question 5

Which equation correctly calculates pulse pressure?

Accepted Answer

Pulse Pressure = Systolic Pressure - Diastolic Pressure 
$$	ext{Pulse Pressure} = 	ext{Systolic Pressure} - 	ext{Diastolic Pressure}$$

Question 6

Which hormone would most likely decrease blood pressure by lowering blood volume?

Accepted Answer

Atrial Natriuretic Peptide

Question 7

A patient is diagnosed with third-degree heart block. Which of the following best describes their cardiac electrical activity?

Accepted Answer

No electrical signals reach the ventricles from the atria; atria and ventricles beat independently.

Question 8

Which structural characteristic of red blood cells (RBCs) makes them optimal for carrying oxygen?

Accepted Answer

They are anucleate and lack mitochondria.

Question 9

Which of the following is the most common type of capillary and its primary function?

Accepted Answer

Continuous capillaries; allow exchange of fluids and small molecules but restrict passage of large proteins and cells.

Question 10

Which organ is primarily responsible for regulating red blood cell (RBC) production?

Accepted Answer

Kidneys

Question 11

A patient receives a blood transfusion with incompatible antigens. What is the most likely outcome?

Accepted Answer

Their immune system attacks the transfused blood cells, leading to serious complications.

Question 12

Which of the following factors is the most significant source of resistance to blood flow?

Accepted Answer

Diameter of the blood vessels

Question 13

Which of the following best describes the function of baroreceptors?

Accepted Answer

They sense changes in blood pressure by detecting the stretch of the vessel wall.

Question 14

Which of the following is NOT a function of blood?

Accepted Answer

Initiating nerve impulses for muscle contraction.

Question 15

Which of the following is a major factor aiding venous return to the heart during exercise?

Accepted Answer

Skeletal muscle contractions compress veins, pushing blood upward.

Question 16

Which of the following best describes bulk flow in capillaries?

Accepted Answer

The movement of large amounts of fluid and solutes together across the capillary wall, regulated by hydrostatic and osmotic pressures.

Question 17

Which of the following is true regarding the uniqueness of blood flow through the skin?

Accepted Answer

It is highly adjustable and plays a major role in thermoregulation.

Question 18

Which of the following best describes the effect of norepinephrine on the heart?

Accepted Answer

It increases heart rate (positive chronotropic effect).

Question 19

Which of the following is a correct real-life application of the Renin-Angiotensin-Aldosterone System (RAAS) in regulating blood pressure?

Accepted Answer

RAAS increases peripheral resistance and blood pressure during dehydration.

BIO 169 Exam 2 Review: Blood, Heart, and Blood Vessels (Chapters 17-19)

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