18 Questions
What is the main role of the specific stroma in the thymus?
To support the parenchyma cells and prevent contact between thymocytes and non-self antigens
Which of the following is NOT a function of the thymic hormones?
Promoting the development of lymph follicles and lymph nodes
What is the process of thymic involution?
The gradual replacement of thymic parenchyma by adipose tissue
Which statement about thymic involution is NOT true?
It leads to the formation of lymph follicles and lymph nodes
What is the main function of the thymus?
Lymphopoiesis through the synthesis of T lymphocytes involved in cellular immunity
Which of the following statements about the thymus is NOT true?
The thymus is involved in the development of lymph follicles and lymph nodes
What type of cells form the specific stroma found in the cortical region of the lymph node?
Reticular cells and reticular fibers
Which category of cells is specifically mentioned to be present in the paracortex area of the lymph node?
T lymphocytes
Where do the afferent lymph nodes open into within the lymph node structure?
Subcapsular sinus
How are the perifollicular sinuses described in relation to the cortex and medulla of the lymph node?
Radially directed from cortex to medulla
Which of the following is NOT a component of the lymphoid tissue cords found in the medullary region of the lymph node?
Basophils
What characterizes the cortical parenchyma included in ganglionic lodges of the lymph node?
Contains lymph nodules
What is the function of the thymic parenchyma?
To produce thymocytes, which are precursors to T cells
What is the function of the Hassall's corpuscles found in the thymic medulla?
To induce apoptosis (programmed cell death) in thymocytes
What is the role of the thymic stroma?
To provide structural support and blood vessels to the thymic parenchyma
What is the difference between the cortex and medulla of the thymic lobe?
Both a and b are correct
What is the significance of the thymocytes undergoing mitosis in the peripheral cortex of the thymic lobe?
It indicates the rapid proliferation of T cell precursors (thymocytes)
What is the function of the thymic capsule and septa?
To provide structural support and blood vessels to the thymic parenchyma
Test your knowledge on the structure of the thymic lobe, including the arrangement of thymocytes and macrophages in the cortex and medulla. Understand the characteristics of the thymic parenchyma and stroma in different zones of the lobe.
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