Q: If a person has a stroke volume ($$SV) of 70 mL $$and a heart rate ($$HR) of 75 $$beats per minute, what is their cardiac output ($$CO$$)?

$$CO = 70 \times 75 = 5250 mL/$$min

Q: Which equation best represents the calculation of hematocrit ($$Hct) $$percentage?

$$Hct = \frac{\text{Volume of RBCs}}{\text{Total Blood Volume}} \times 100$$

Question 1

Which of the following best describes the function of blood in the human body?

Accepted Answer

Blood is responsible for transporting oxygen, nutrients, and waste products throughout the body.

Question 2

A patient presents with a high white blood cell count after a blood smear. What is the most likely physiological explanation?

Accepted Answer

The patient is likely fighting an infection or inflammation.

Question 3

Which equation best represents the calculation of cardiac output ($$CO) in $$the cardiovascular system?

Accepted Answer

$$CO = HR 	imes SV$$

Question 4

During a reflex arc, which structure is responsible for integrating sensory input and generating a motor response?

Accepted Answer

Central nervous system (CNS)

Question 5

A decrease in blood pH (acidosis) can have which effect on hemoglobin's affinity for oxygen?

Accepted Answer

Decrease hemoglobin's affinity for oxygen

Question 6

Which of the following best describes the role of the sympathetic nervous system during a 'fight or flight' response?

Accepted Answer

It increases heart rate and redirects blood flow to muscles.

Question 7

A patient with low blood volume is likely to experience which physiological change?

Accepted Answer

Decreased blood pressure due to reduced volume.

Question 8

Which formula correctly represents the relationship between mean arterial pressure ($$MAP$$), cardiac output ($$CO$$), and total peripheral resistance ($$TPR$$)?

Accepted Answer

$$MAP = CO 	imes TPR$$

Question 9

If a person has a stroke volume ($$SV) of 70 mL $$and a heart rate ($$HR) of 75 $$beats per minute, what is their cardiac output ($$CO$$)?

Accepted Answer

$$CO = 70 	imes 75 = 5250 mL/$$min

Question 10

Which of the following best explains why oxygen is transported by hemoglobin in red blood cells rather than dissolved directly in plasma?

Accepted Answer

Hemoglobin binds oxygen, allowing for greater transport capacity than plasma alone.

Question 11

A patient with chronic hypertension is at risk for which of the following complications?

Accepted Answer

Damage to blood vessel walls and increased risk of stroke

Question 12

Which of the following is a direct effect of increased sympathetic stimulation on the heart?

Accepted Answer

Increased heart rate

Question 13

Which equation best represents the calculation of hematocrit ($$Hct) $$percentage?

Accepted Answer

$$Hct = \frac{	ext{Volume of RBCs}}{	ext{Total Blood Volume}} 	imes 100$$

Question 14

Which scenario best illustrates a negative feedback mechanism in the human body?

Accepted Answer

Body temperature rises, triggering sweating to cool down.

Question 15

A patient with a deficiency in clotting factors is most likely to experience which symptom?

Accepted Answer

Excessive bleeding after minor injuries

Question 16

Which of the following best describes the effect of vasoconstriction on blood pressure?

Accepted Answer

Vasoconstriction increases blood pressure by increasing resistance.

Question 17

Which of the following is a primary function of platelets in the blood?

Accepted Answer

Initiating blood clot formation

Question 18

A patient with a low hematocrit value is most likely suffering from which condition?

Accepted Answer

Anemia

Question 19

Which of the following best describes the relationship between blood viscosity and resistance to flow?

Accepted Answer

Increased viscosity increases resistance to flow.

Question 20

Which of the following is a consequence of prolonged low oxygen levels (hypoxia) in tissues?

Accepted Answer

Increased production of red blood cells (erythropoiesis)

AP2 Study Notes: Blood, Reflexes, and Cardiovascular System

Study Guide - Practice Questions

Study Guide - Flashcards