Intermediate Thymus Quiz

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

• Podocytes
• Epithelial reticular cells
• Skeletal myocytes
• Chondrocytes

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

• Medulla
• Capsule
• Perithymic fat
• Cortex

Q3. Where are Hassall corpuscles located?

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

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

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

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?

• Ossification
• Erythropoiesis
• Hemostasis
• Negative selection

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

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

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

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

Q9. Which arteries commonly contribute branches to the thymus?

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

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

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