HISTOLOGY NBME R EVIEW QUESTIONS & ANSWERS RATED 100%
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What prevents the intercellular passage of ions from the luminal surface to the lamina propria of the intestine? Answer- Tight Junctions/ Zonulae Occludens
What type of epithelial cells are in the intestine? Answer- Simple columnar
What is located in your sertoli cells that forms the blood testis barrier? Answer- Tight
Junctions / Zonulae Occludens
What is overdistended and destroyed in emphysema? Answer- Alveolar ducts
What biogenic amine is diurnally secreted in pinealocytes? Answer- Melatonin
Where does the reabsorption of glucose in the kidneys take place? Answer- Proximal Convoluted Tubules
In the renal cortex, what is the labyrinth of capillaries that carry resorbed glucose out of the kidney? Answer- Vasa Recta
Where does the Vasa Recta arise from? Answer- Efferent arterioles of the juxtamedullary nephrons
What does the proliferations of the endometrium depend on? (the follicular phase) Answer- Estrogen
What hormone stimulates the secretory phase of the menstrual cycle? Answer- Progesterone
What is found exclusively in the basal compartment of seminiferous tubules? Answer- Spermatagonia
What is a marker for when cells differentiate into epidermal epithelial tissue? Answer- Keratin
2 days after an overdose of barbiturates, what will show the greatest increase in hepatocytes? Answer- Smooth endoplasmic reticulum
What is abundant in your hepatocytes? Answer- RER and SER Where are glycoproteins found during the final stage of secretory glycoprotein formation? (before exocytosis) Answer- Trans golgi complex
Where does the synthesis of rRNA happen? Answer- Nucleolus
What mediates the beating/movement of cilia? Answer- Dynein arms
What is a disorder associated with the dynein arms and movement of cilia? Answer-
Kartagener syndrom
In what menstrual stage do we see long straight endometrial glands with narrow lumens that are embedded in a thick stratum functionale of the endometrium? Answer- Proliferative stage
What happens during your proliferative stage of mensuration? Answer- Increase in secretion of FSH and decreasing secretion of LH
What molecule does the blood brain barrier exclude from the brain parenchyma? (meaning it can pass through the BBB) Answer- Albumin
If something is injected into a cell and it can later be found in an adjacent cell, what structure can be seen between these two cells? Answer- Gap junctions
What does gap junctions facilitate? Answer- Ionic communications
Where do we see fenestrated cappilaries? Answer- Thyroid gland, kidneys and GIT
What type of capillaries are in the central nervous system? Answer- Continuous capillaries (remember BBB)
What type of capillaries are found in the lungs? Answer- Continuous capillaries (remember BAB)
What type of capillaries are found in the muscles? Answer- Continuous
What type of capillaries are found in the thymus? Answer- Continuous (remember BTB)
What type of capillaries are found in the thyroid gland? Answer- Fenestrated
What differentiates capillaries in the brain from those in the gut? Answer- The brain has an absence of endothelial cell membrane fenestrations
What are your skeletal muscle sensory receptors? Answer- infrafusal muscle fibers
What does your infrafusal muscle fibers contain that your extrafusal muscle fibers do
not? Answer- Stretch sensitive nerve endings
What protein results in spherocytosis? Answer- Mutation of spectrin
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