Histology Nbme Questions & Answers 2023(A+ Graded 100% Verified)

Tight junctions {Ans: -Tight junctions form a water tight seal and prevent material from passing between cells -contain occludin and claudin -located in between enterocyte}Which of the following nuclear structures is DNA actively transcribing to rRNA {Ans: Nucleolus}Function of estrogen {Ans: Female sex hormone -produced a lot during follicle development}blood brain barrier {Ans: Allows the passage of water, some gases, and lipid-soluble molecules by passive diffusion, as glucose and amino acids -NO Albumin, protein}Plasma cell {Ans: B cells differentiate into plasma cells that produce antibody -when bacteria or viruses enter the body, some of the B cells will change into plasma cells. The plasma cells make antibodies to fight bacteria and viruses}In which phase of the cell cycle are these cells arrested {Ans: Diplotene stage of the 1st meiotic division}Microglial cells {Ans: macrophages of the cns}Function of basal membrane infoldings {Ans: Increase surface area}Glucose passed the filtration barrier - pass thru what renal tubule? {Ans: PCT}Function of natural killer cells {Ans: Target and kill aberrant cells, (virally infected and tumorigenic cells) -killing is mediated by cytotoxic molecules -the NK cell releases cytotoxic granules containing perforin and granzymes, which leads to