Q: A patient presents with chronic high blood pressure. Which equation would you use to calculate their cardiac output, and what are the variables involved?

$$CO = HR \times SV$$; where $$CO is $$cardiac output, $$HR is $$heart rate, and $$SV is $$stroke volume

Q: A patient with a heart rate of 80 bpm and a stroke volume of 70 mL/beat has what cardiac output?

$$CO = 80 \times 70 = 5600\ \text{mL/min}$$

Question 1

Which of the following best describes the primary function of capillaries in the cardiovascular system?

Accepted Answer

To facilitate exchange of gases, nutrients, and waste products between blood and tissues

Question 2

A patient presents with chronic high blood pressure. Which equation would you use to calculate their cardiac output, and what are the variables involved?

Accepted Answer

$$CO = HR 	imes SV$$; where $$CO is $$cardiac output, $$HR is $$heart rate, and $$SV is $$stroke volume

Question 3

Which blood component is primarily responsible for gas transport, and what percentage of blood volume does it typically occupy?

Accepted Answer

Erythrocytes; 45%

Question 4

A patient with type O- blood is considered a universal donor. Which of the following best explains why?

Accepted Answer

O- blood lacks both A and B antigens and Rh factor, minimizing immune reactions in recipients

Question 5

During the cardiac cycle, which event is represented by the QRS complex on an ECG?

Accepted Answer

Ventricular depolarization and ventricular systole

Question 6

Which vascular structure is primarily responsible for systemic vascular resistance and blood pressure regulation?

Accepted Answer

Arterioles

Question 7

A patient develops edema due to increased hydrostatic pressure at the capillary interface. Which process is most directly impaired?

Accepted Answer

Osmotic reabsorption of fluid into the venous end of capillaries

Question 8

Which of the following is a key difference between innate and adaptive immunity?

Accepted Answer

Innate immunity provides immediate, non-specific defense; adaptive immunity is slower but highly specific and provides memory

Question 9

Which of the following best describes the role of veins in the circulatory system?

Accepted Answer

They serve as capacitance vessels, holding the majority of the blood volume

Question 10

A patient with a heart rate of 80 bpm and a stroke volume of 70 mL/beat has what cardiac output?

Accepted Answer

$$CO = 80 	imes 70 = 5600\ 	ext{mL/min}$$

Question 11

Which of the following is a normal physiological value for hematocrit in a healthy adult?

Accepted Answer

Approximately 45%

Question 12

Which pathological condition is most likely to result from a failure in the electrical conduction system of the heart?

Accepted Answer

Arrhythmia

Question 13

Which of the following best explains why AB+ individuals are considered universal recipients for blood transfusions?

Accepted Answer

They have no circulating antibodies against A, B, or Rh antigens

Question 14

Which vessel layer is most prominent in arteries and is responsible for their ability to withstand high pressure?

Accepted Answer

Tunica media

Question 15

A patient’s blood pH is measured at 7.2. How does this value compare to the normal range, and what is the clinical term for this condition?

Accepted Answer

It is below normal; acidosis

Question 16

Which of the following best describes the function of the lymphatic system in relation to the cardiovascular system?

Accepted Answer

It returns excess interstitial fluid to the bloodstream and participates in immune defense

Question 17

Which of the following is the primary determinant of preload in the heart?

Accepted Answer

The degree of stretch on the heart muscle before contraction

Question 18

Which of the following is a normal resting heart rate for a healthy adult?

Accepted Answer

60-100 bpm

Question 19

Which pressure is primarily responsible for driving fluid out of capillaries at the arterial end?

Accepted Answer

Hydrostatic pressure

Question 20

A patient with a blocked lymphatic vessel in the lower limb is most likely to develop which condition?

Accepted Answer

Edema

Cardiovascular and Lymphatic Systems Mastery Guide

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