Histology NBME exam questions with answers 2025

Histology NBME exam questions with |\ |\ |\ |\ |\




answers 2025 |\




Hematoxlyin and Eosin - CORRECT ANSWERS ✔✔1. Hematoxylin |\ |\ |\ |\ |\ |\ |\ |\


= basic dye stains acidic molecules like nucleus, DNA, RNA
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2. Eosin = acidic dye stains basic molecules like cytoplasm
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Plasma membrane - CORRECT ANSWERS ✔✔lipid bilayer in which
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proteins are embedded
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-has 2 layers |\ |\ |\




1. hydrophilic = head
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2. hydrophobic = tail
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2 types of proteins in plasma membrane:
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1. Integral membrane proteins = inside the plasma membrane
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2. Peripheral membrane proteins = outside of the membrane
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*steroids are lipid soluble molecule, anything that is lipid soluble
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can pass through the lipid bilayer*
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B-galactosidase - CORRECT ANSWERS ✔✔An enzyme located in |\ |\ |\ |\ |\ |\ |\ |\


lysosomes

,breaks down lactose|\ |\




-activity at the cell surface of enterocytes
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Enterocytes - CORRECT ANSWERS ✔✔specialized absorptive cells
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in the villi of the small intestine
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Merkels cells - CORRECT ANSWERS ✔✔detect light touch and
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superficial pressure |\




Langerhans cells - CORRECT ANSWERS ✔✔special macrophages
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that serve as antigen-presenting cells in the skin
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Types of collagen - CORRECT ANSWERS ✔✔type 1 - bone
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type 2- cartilage
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type 3 - reticular fibers
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type 4 - basement membrane
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Respiratory flow - CORRECT ANSWERS ✔✔Trachea |\ |\ |\ |\ |\ |\




Primary bronchi |\




Secondary bronchi |\




Tertiary bronchi |\




Respiratory bronchioles |\




Alevolar ducts |\ |\




Alecolar sacs |\

, Tertiary bronchi - CORRECT ANSWERS ✔✔source of the mucus
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Function of estrogen - CORRECT ANSWERS ✔✔Female sex
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hormone
-produced a lot during follicle development |\ |\ |\ |\ |\




1. Atrophy|\




2. Hyperplasia
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3. Hypertrophy
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4. Hypoplasia
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5. Metaplasia - CORRECT ANSWERS ✔✔1. cells die
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2. get bigger in cell #
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3. get bigger in size
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4. incomplete development
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5. cells change in shape abnormal
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Which muscle cell component helps spread the depolarization of
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the muscle cell membrane throughout the interior of muscle cells
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- CORRECT ANSWERS ✔✔T-tubules
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Which cells make myelin in CNS and PNS? - CORRECT ANSWERS
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✔✔CNS = oligodendrocytes |\ |\




PNS = schwaan cells |\ |\ |\




Microglial cells - CORRECT ANSWERS ✔✔-Macrophages of the
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CNS