Intermediate Thymus Quiz

Q1. What forms the supporting cellular framework of thymic parenchyma?

• Skeletal myocytes
• Epithelial reticular cells
• Chondrocytes
• Podocytes

Q2. Which thymic region contains the greatest concentration of immature thymocytes?

• Perithymic fat
• Capsule
• Medulla
• Cortex

Q3. Where are Hassall corpuscles located?

• Thymic cortex
• Lymph node subcapsular sinus
• Splenic red pulp
• Thymic medulla

Q4. Which embryonic structure gives rise to the thymic epithelial component?

• First pharyngeal cleft
• Second aortic arch
• Neural tube
• Third pharyngeal pouch

Q5. Why can thymic tissue extend into the lower neck?

• The thymus originates in the diaphragm
• The thymus develops from the sternum
• The thymus migrates upward from the pelvis
• The thymus descends from the pharyngeal region during development

Q6. Which process removes many thymocytes that strongly recognize self antigens?

• Erythropoiesis
• Hemostasis
• Ossification
• Negative selection

Q7. What is the purpose of positive selection during T cell development?

• Remove all cells expressing T cell receptors
• Select thymocytes capable of recognizing self MHC
• Select erythrocytes that bind oxygen
• Generate immunoglobulin in plasma cells

Q8. Which feature helps restrict exposure of developing cortical thymocytes to circulating antigens?

• Thoracic duct valve
• Splenic marginal zone
• Blood-thymus barrier
• Lymph node hilum

Q9. Which arteries commonly contribute branches to the thymus?

• Radial and ulnar arteries
• Anterior and posterior tibial arteries
• Internal thoracic and inferior thyroid arteries
• Renal and gonadal arteries

Q10. Which statement correctly describes lymphatic vessels of the thymus?

• It has efferent lymphatics but lacks typical afferent lymphatics
• It receives numerous afferent lymphatics for lymph filtration
• It has no lymphatic drainage of any kind
• It drains directly into the portal vein