Organ Histology Flashcards
7 cards from real Histology Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Organ Histology flashcards as text
Which layer of the adrenal cortex produces mineralocorticoids such as aldosterone?
Answer: Zona glomerulosa
The zona glomerulosa is the outermost cortical layer and is the sole site of mineralocorticoid synthesis.
The hepatic sinusoids are lined by which specialized cell type that lacks a basement membrane?
Answer: Sinusoidal endothelial cells
Sinusoidal endothelial cells (LSECs) line hepatic sinusoids and are fenestrated without a continuous basement membrane, facilitating exchange.
In the kidney, which structure separates the glomerular capillary lumen from the Bowman's space?
Answer: Filtration barrier (endothelium, GBM, podocytes)
The filtration barrier consists of fenestrated endothelium, glomerular basement membrane, and podocyte foot processes with slit diaphragms.
The interalveolar septa of the lung contain type II pneumocytes whose primary function is to:
Answer: Produce surfactant
Type II pneumocytes contain lamellar bodies and secrete pulmonary surfactant to reduce alveolar surface tension.
Which histological feature distinguishes the pyloric glands of the stomach from the fundic glands?
Answer: Predominantly mucous secretory cells with few parietal cells
Pyloric glands are composed mainly of mucous cells and are nearly devoid of the chief and parietal cells that dominate fundic glands.
The thyroid follicle is filled with colloid, which stores which precursor molecule?
Answer: Thyroglobulin
Thyroglobulin is the glycoprotein stored in follicular colloid and serves as the precursor for thyroid hormone synthesis.
Which zone of the liver acinus (Rappaport) is most susceptible to ischemic necrosis due to its distance from the portal triad?
Answer: Zone 3
Zone 3 hepatocytes, located closest to the central vein, receive the least oxygenated blood and are most vulnerable to ischemia.