Histology US Medical PG Flashcards - Medical Study Cards
Master Histology with OnCourse flashcards. These spaced repetition flashcards are designed for medical students preparing for NEET PG, USMLE Step 1, USMLE Step 2, MBBS exams, and other medical licensing examinations.
Histology Flashcard Deck - 10 Cards
Flashcard 11: Sebaceous glands and meibomian glands are what type of exocrine gland?
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Answer: Holocrine
Extra: Watch associated Bootcamp video [https://app.bootcamp.com/med-school/histology/videos/skin?index=8]
https://onlinemeded.org?ref=anki
Secretory mechanisms of exocrine glands
There are three different secretory mechanisms in the exocrine glands.
(1) Exocytosis: Several vesicles, which detach from the Golgi apparatus, are transported to the cell membrane, to which they then attach, allowing the release of intravesicular contents (e.g. proteins, neurotransmitter) into the extracellular space.
(2) In apocrine secretion, the secretion (e.g. milk lipid droplets) is detached with part of the apical cytoplasm and the cell membrane. As a result, the gland cell becomes smaller.
(3) Holocrine secretion only occurs in sebaceous glands. The secretion is released by apoptosis of the gland cell. During the course of maturation, the cell continuously produces sebum. Cell organelles and the nucleus are degraded and the cell subsequently disintegrates, with its entire content forming part of the secretion.
Sebaceous gland and the arrector pili muscle
Photomicrograph of skin tissue (Azan stain; 600x magnification)
Sebaceous gland (green overlay) can be seen in the dermis. The gland consists of groups of ball-shaped sebocytes (1). Maturation and migration of sebocytes begin on the basement membrane (2). The arrector pili muscle (3) consists of several spindle-shaped, smooth muscle cells (leiomyocytes) that insert into the hair shaft. The contraction of leiomyocytes results in piloerection and leads to increased secretion of sebum from the glands.
Flashcard 12: The Mesenchyme gives rise to most _____
Answer: connective tissue
Extra: Watch associated Bootcamp video [https://app.bootcamp.com/med-school/embryology/videos/embryonic-period-weeks-3-8?index=3]
https://onlinemeded.org/spa/general-physiology/cytoskeleton/acquire?ref=anki
Flashcard 13: Which skin layers contain nerve endings, blood vessels, lymphatics, and adnexal structures (e.g. hair follicles, glands)?
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Answer: Dermis and hypodermis
Extra:
Watch associated Bootcamp video [https://app.bootcamp.com/med-school/histology/videos/skin?index=6]
https://onlinemeded.org?ref=anki
Atlas:
Flashcard 14: Breast Cancer Assessment: The immunohistochemical stain for the _____ receptor is located in the nuclei.
Answer: estrogen
Extra: * **Nuclear staining**: Estrogen Receptor (ER), Progesterone Receptor (PR).
* **Membranous staining**: HER2/neu.
* **Cytoplasmic staining**: Often seen in other markers like E-cadherin (though loss of E-cadherin is used to distinguish lobular from ductal carcinoma).
Flashcard 15: _____ is a stretchy protein within skin, lungs, large arteries, elastic ligaments, vocal cords, and ligamentum flava
Answer: Elastin
Extra:
Watch associated Bootcamp video [https://app.bootcamp.com/med-school/histology/videos/connective-tissue?index=4]
https://onlinemeded.org?ref=anki
Flashcard 16: _____ are thin-walled blood vessels that consist of a single layer of endothelial cells surrounded by a basal lamina
Answer: Capillaries
Extra: Watch associated Bootcamp video [https://app.bootcamp.com/med-school/histology/videos/cardiovascular-system?index=15]
https://onlinemeded.org?ref=anki
Flashcard 17: Meissner corpuscles are large, _____ fibers
Answer: myelinated
Extra:
Watch associated Bootcamp video [https://app.bootcamp.com/med-school/histology/videos/skin?index=7]
https://onlinemeded.org/spa/neurology?ref=anki
Flashcard 18: What type of filament are cilia and flagella?
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Answer: Microtubule
Extra: Watch associated Bootcamp video [https://app.bootcamp.com/med-school/histology/videos/methods-and-overview-of-cells?index=10]
https://onlinemeded.org/spa/general-physiology/cytoskeleton/acquire?ref=anki
Flashcard 19: The lymph node paracortex contains _____, through which T and B cells enter from the blood
Answer: high endothelial venules (HEV)
Extra:
Watch associated Bootcamp video [https://app.bootcamp.com/med-school/immunology/videos/lymphoid-tissue?index=6]
https://onlinemeded.org/spa/immunology?ref=anki
Atlas:
Flashcard 20: Which type of sensory receptor is "onion shaped"?
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Answer: Pacinian corpuscles
Extra:
Watch associated Bootcamp video [https://app.bootcamp.com/med-school/histology/videos/skin?index=7]
https://onlinemeded.org/spa/neurology?ref=anki
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