Ch. 3 Anatomy, Physiology, and Pathology Flashcards
Cytokine important in B and T cell development
IL-7
positive selection of T cells occurs?
thymic cortex
negative selection of T cells occurs?
begins in thymic cortex, finishes in medulla
What are Hassall corpuscles?
small bodies of granular cells surrounded by concentric layers of epithelial cells in the medulla
Where are resting B cells found?
primary follicle in the lymph node
Where is the germinal center of B cell proliferation located?
secondary follicle
Where are T cells located in the LN?
parafollicular cortex
How does the spleen receive lymphocytes and antigen?
via splenic artery (no afferent lymph supply)
Where is MALT (mucosa associated lymphoid tissue) located?
lamina propria and submucosa
Nasal airway resistance is regulated by?
swelling of the inferior turbinate at the level of the nasal valve
Which sinuses are present at birth?
maxillary and ethmoid sinuses
What sinuses drain into the middle meatus (into hiatus semilunaris)?
frontal, maxillary, and anterior ethmoids
What sinuses drain into the sphenoethmoidal recess?
posterior ethmoids, sphenoid sinus
What opens into the inferior meatus?
nasolacrimal duct
Where is the sphenoethmoidal recess located?
above the superior turbinate
Anterior ethmoid air cells above the middle turbinate
Agger nasi cells
Extramural ethmoid air cells found on the floor of the orbit
Haller cells
Sphenoethmoid air cell, found in close proximity to the internal carotid artery and optic nerve
Onodi cells
