Question 1

Which of the following best describes the function of lacteals in the lymphatic system?

Accepted Answer

They absorb dietary fats from the small intestine and transport them to the bloodstream.

Question 2

A patient presents with swollen, tender lymph nodes (buboes) following a bacterial infection. Which of the following best explains the cause of this swelling?

Accepted Answer

Accumulation of infected lymph and proliferation of immune cells within the lymph node cortex.

Question 3

Which of the following statements about the right lymphatic duct and thoracic duct is correct?

Accepted Answer

Both ducts return lymph to the venous circulation at the junction of the internal jugular and subclavian veins.

Question 4

Which of the following is a primary lymphoid organ and what is its main function?

Accepted Answer

Thymus; site of T cell maturation and selection.

Question 5

During an inflammatory response, which sequence correctly represents the stages of inflammation?

Accepted Answer

Vasodilation, increased permeability, phagocyte mobilization, tissue repair.

Question 6

A patient with a genetic defect in complement protein C3 would most likely have impaired:

Accepted Answer

Opsonization, inflammation, and formation of membrane attack complex (MAC).

Question 7

Which equation correctly represents the net filtration pressure (NFP) in the glomerulus?

Accepted Answer

NFP = (Hydrostatic pressure in glomerular capillaries) - (Hydrostatic pressure in capsular space + Colloid osmotic pressure in capillaries)
$$	ext{NFP} = P_{GC} - (P_{CS} + 	ext{COP}_{GC})$$

Question 8

Which of the following best describes the difference between obligatory and facultative water reabsorption in the nephron?

Accepted Answer

Obligatory water reabsorption occurs in the proximal convoluted tubule and is independent of hormones, while facultative water reabsorption occurs in the collecting duct and is regulated by antidiuretic hormone (ADH).

Question 9

Which of the following is TRUE regarding MHC class I and class II proteins?

Accepted Answer

MHC class I proteins are found on all nucleated cells and present endogenous antigens to CD8 T cells; MHC class II proteins are found on antigen-presenting cells and present exogenous antigens to CD4 T cells.

Question 10

A patient receives an injection of antibodies against rabies after being bitten by a rabid animal. This is an example of:

Accepted Answer

Artificially acquired passive humoral immunity.

Question 11

Which of the following best describes the process of clonal selection in the adaptive immune response?

Accepted Answer

Upon antigen encounter, a lymphocyte is activated and proliferates to produce effector and memory cells specific to that antigen.

Question 12

Which of the following is a function of the spleen's red pulp?

Accepted Answer

Destruction of old and damaged red blood cells.

Question 13

Which of the following is NOT a function of the kidneys?

Accepted Answer

Production of lymphocytes for immune defense.

Question 14

Which of the following correctly matches the region of the nephron with its primary function?

Accepted Answer

Proximal convoluted tubule: reabsorption of nutrients, water, and ions.

Question 15

A patient with a deficiency in helper T cells would most likely experience:

Accepted Answer

Impaired activation of both humoral and cellular immune responses.

Question 16

Which of the following best describes the role of pyrogens in the immune response?

Accepted Answer

Pyrogens are chemicals released by leukocytes and pathogens that raise the body's set point temperature, resulting in fever.

Question 17

Which of the following equations correctly represents the calculation of glomerular filtration rate (GFR) using clearance?

Accepted Answer

GFR = (Urine concentration of substance × Urine flow rate) / Plasma concentration of substance
$$	ext{GFR} = \frac{U 	imes V}{P}$$

Question 18

Which of the following is a plausible consequence of impaired tubular secretion in the nephron?

Accepted Answer

Accumulation of metabolic wastes and drugs in the blood, leading to toxicity.

Question 19

Which of the following best explains why the thymus is unique among lymphoid organs?

Accepted Answer

It does not directly fight antigens but is the site of T cell maturation and selection.

Lymphatic, Immune, and Urinary Systems: Comprehensive Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards