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CHAPTER 13 - ENDOCRINE GLANDS
Histology Guide
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MICROGRAPH

NAME
RD 248 Alpha Cells
TISSUE
Pancreatic Islet
(pancreas)
IMAGE SIZE
8,301 x 6,933 pixels
165 MB
FILE SIZES
45,633 KB (grayscale)
47,668 (color)
MAGNIFICATION
Unknown
PIXEL SIZE
1.500 nm
SOURCE
Ronald W. Dudek
Brody School of Medicine
East Carolina University
Greenville, North Carolina

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RD 248 Alpha Cells

Alpha Cells

Alpha cells produce the hormone glucagon that increases blood glucose levels. They constitute around 15-20% of the islet cells in humans.

Transmission electron micrograph (TEM) of alpha cells in a pancreatic islet. Alpha cells contain numerous secretory granules about 250-300 um in diameter with a dense, homogenous matrix. Differences in granule morphology allow easy identification from beta cells.

  • (blue) / Nuclear Envelope (purple)
  • (yellow)
  • (red)
  • Rough Endoplasmic Reticulum (cyan)
  • (purple)
  • Cytoplasm (green)

Courtesy of Ronald W. Dudek, Brody School of Medicine, East Carolina University, Greenville, North Carolina.

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