Question 1

Which of the following best describes the function of the flaplike minivalves in lymphatic capillaries as shown in the first image?

Accepted Answer

They open in response to increased interstitial fluid pressure, allowing fluid and particles to enter the lymphatic capillary.

Question 2

A patient has a blockage in the thoracic duct. Based on the second image, which region of the body would most likely experience impaired lymph drainage?

Accepted Answer

Left arm and left side of the head

Question 3

Which tonsil group, as shown in the third image, is most commonly removed during a tonsillectomy?

Accepted Answer

Palatine tonsils

Question 4

The spleen, as depicted in the fourth image, has both white pulp and red pulp. Which of the following best describes the function of the white pulp?

Accepted Answer

It is the site where immune functions occur, containing lymphocytes and macrophages that target bloodborne pathogens.

Question 5

Which leukocyte, shown in the fifth image, is most abundant in normal blood and is known as a 'bacteria slayer'?

Accepted Answer

Neutrophil

Question 6

A patient presents with an elevated number of the cell shown in the sixth image. Which condition is most likely present?

Accepted Answer

Parasitic worm infection

Question 7

The cell shown in the seventh image releases histamine and is involved in allergic reactions. What is the primary function of histamine in this context?

Accepted Answer

Acts as a vasodilator and attracts other white blood cells to the site of inflammation

Question 8

Which cell, shown in the eighth image, differentiates into a macrophage upon entering tissues and is crucial for antigen presentation?

Accepted Answer

Monocyte

Question 9

Referencing the ninth image, what is the primary role of interferons in the innate immune response?

Accepted Answer

They stimulate neighboring cells to produce antiviral proteins and activate immune cells.

Question 10

Based on the tenth image, where do T cells mature and become immunocompetent?

Accepted Answer

Thymus

Question 11

Which process, illustrated in the eleventh image, is essential for the proliferation of activated lymphocytes during an immune response?

Accepted Answer

Clonal selection

Question 12

The twelfth image shows two antibody structures. Which class of antibody is most likely represented by the pentameric structure?

Accepted Answer

IgM

Question 13

According to the thirteenth image, which antibody class is most effective at triggering the complement system and is the first antibody secreted during a primary immune response?

Accepted Answer

IgM

Question 14

Based on the fourteenth image, which of the following best describes the sequence of events in the adaptive immune response to a new antigen?

Accepted Answer

Antigen presentation, clonal selection, differentiation, antibody production

The Lymphatic System and Immunity: Structure, Function, and Cellular Mechanisms

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