Q: Which of the following equations correctly calculates the hematocrit percentage ($$Ht\%) $$given the volume of packed red blood cells ($$V_{RBC}) $$and the total blood volume ($$V_{total}$$)?

$$Ht\% = \frac{V_{RBC}}{V_{total}} \times 100$$

Question 1

A patient presents with severe liver disease, resulting in decreased albumin production. Which of the following is the most likely physiological consequence of this condition?

Accepted Answer

Decreased osmotic pressure in the blood, leading to edema

Question 2

Which of the following best describes the role of vitamin K in the coagulation process?

Accepted Answer

It is required for the synthesis of several clotting factors in the liver

Question 3

A patient with type AB+ blood is considered a universal recipient for blood transfusions. Which of the following best explains why?

Accepted Answer

They lack anti-A, anti-B, and anti-Rh antibodies in their plasma

Question 4

Which of the following equations correctly calculates the hematocrit percentage ($$Ht\%) $$given the volume of packed red blood cells ($$V_{RBC}) $$and the total blood volume ($$V_{total}$$)?

Accepted Answer

$$Ht\% = \frac{V_{RBC}}{V_{total}} 	imes 100$$

Question 5

A patient is diagnosed with anemia due to chronic blood loss. Which of the following best describes the expected changes in their reticulocyte count and why?

Accepted Answer

Increased reticulocyte count as the bone marrow compensates for RBC loss

Question 6

Which of the following best differentiates between the intrinsic and extrinsic pathways of coagulation?

Accepted Answer

The intrinsic pathway is initiated by contact with exposed collagen, while the extrinsic pathway is triggered by tissue factor from damaged tissues

Question 7

A patient receives a transfusion of type A blood but is type B. Which of the following is most likely to occur?

Accepted Answer

Agglutination and hemolysis of the transfused red blood cells

Question 8

Which of the following best describes the function of lymph nodes in the lymphatic system?

Accepted Answer

They filter lymph and provide sites for immune cell activation

Question 9

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

Accepted Answer

Adaptive immunity develops memory after exposure, while innate immunity does not

Question 10

A patient has a WBC count of 12,000/μL (normal: 4,000–11,000/μL) and a hematocrit of 30% (normal: 38–52%). Which of the following best describes their condition?

Accepted Answer

Leukocytosis and anemia

Question 11

Which of the following best describes the process of agglutination in the ABO blood system?

Accepted Answer

Antibodies bind to antigens on red blood cells, causing them to clump together

Question 12

Which of the following is the correct sequence of events in the inflammatory response?

Accepted Answer

Vasodilation, increased capillary permeability, phagocyte migration, tissue repair

Question 13

Which of the following best explains why vaccinations provide long-term immunity?

Accepted Answer

They stimulate the production of memory B and T cells

Question 14

Which of the following best describes the function of MHC class II molecules?

Accepted Answer

They present exogenous antigens to helper T cells

Question 15

A patient is exposed to a pathogen for the first time. Which of the following best describes the primary immune response?

Accepted Answer

It is slower and produces fewer antibodies than the secondary response

Question 16

Which of the following best describes the role of platelets in hemostasis?

Accepted Answer

They adhere to damaged endothelium and aggregate to form a platelet plug

Question 17

Which of the following is a function of the lymphatic system?

Accepted Answer

Returning excess interstitial fluid to the bloodstream

Question 18

Which of the following best describes the difference between active and passive immunity?

Accepted Answer

Active immunity involves memory cell formation, while passive immunity does not

Question 19

A patient with a deficiency in helper T cells would most likely have which of the following problems?

Accepted Answer

Impaired antibody production

Question 20

Which of the following best describes the process of lymph formation?

Accepted Answer

It is formed by the filtration of plasma through capillary walls into tissue spaces

Blood, Hemostasis, and the Lymphatic System: Study Guide for Anatomy & Physiology Exam 1

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