Chapter 7: Mitochondria

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MITOCHONDRIA In the majority of cell types the range of variation in mitochondrial size and shape is relatively narrow7 but in a few cell types they exhibit an unusual degree of pleomorphism. Prominent among these are steroid-secreting cells such as those in the interstitial tissue of the testis. Reproduced here is a Leydig cell showing considerable variation in mitochondrial shape. Much more extreme examples of size difference are not infrequent7 with huge spherical mitochondria 6 to 7 pm in diameter adjacent to small elongate mitochondria 0.5 pm wide. Figure 247. Leydig cell from the testis of Citellus lateralis. (Micrograph courtesy of Jeffrey Pudney.) Figure 247 459
MITOCHONDRIA Steroid-secreting cells also exhibit unusual diversity in the form of the cristae in their mitochondria. Those shown here, for example, have small alveolar cristae along the inner membrane, longitudinally oriented lamellar cristae (single arrows), and bundles of parallel tubules coursing in various directions in the matrix (double arrows). Figure 248. <strong>Mitochondria</strong> from testicular Leydig cells of the ground squirrel, Citellus lateralis. (Micro- graph courtesy of Jeffrey Pudney.) Figure 248, upper and lower 46 1
Page 2 and 3: Second Edition THE CELL DON W. FAWC
Page 4 and 5: PREFACE The history of morphologica
Page 6 and 7: MITOCHONDRIA Mitochondria are ubiqu
Page 8 and 9: STRUCTURE OF MITOCHONDRIA A mitocho
Page 10 and 11: MITOCHONDRIA In general, the number
Page 12 and 13: MITOCHONDRIA Matrix granules have b
Page 14 and 15: MITOCHONDRIA It is rare to observe
Page 16 and 17: DIVISION MITOCHONDRIA In the 1930s,
Page 18 and 19: 434 MITOCHONDRIA In the upper figur
Page 20 and 21: 438 FUSION OF MITOCHONDRIA No doubt
Page 22 and 23: 442 VARIATIONS IN INTERNAL STRUCTUR
Page 24 and 25: MITOCHONDRIA In mitochondria of wel
Page 26 and 27: MITOCHONDRIA Tubular cristae of pro
Page 28 and 29: MITOCHONDRIA In contrast to the irr
Page 32 and 33: MITOCHONDRIA The ability of mitocho
Page 34 and 35: 466 MITOCHONDRIA During spermiogene
Page 36 and 37: MITOCHONDRIA An example of localiza
Page 38 and 39: MITOCHONDRIA One of the most striki
Page 40 and 41: MITOCHONDRIA The intimacy of the as
Page 42 and 43: 482 MITOCHONDRIA In the midpiece of

Chapter 7: Mitochondria

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