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Compare the abundance of cristae in the mitochondria in Fig. 18.11b (677) with those in Fig. 20.21 (760). Is there a difference? What might this reflect in functional terms?

Compare the abundance of cristae in the mitochondria in Fig. 18.11b (677) with those in Fig. 20.21 (760). Is there a difference? What might this reflect in functional terms?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Compare the abundance of cristae in the mitochondria in Fig. 18.11b (677) with those in Fig. 20.21 (760). Is there a difference? What might this reflect in functional terms?

 

SER SER M. rER FIGURE 18.11. Electron micrographs of a hepatocyte. a. This electron micrograph shows organelles and other cytoplasmic structures near the nucleus (N). These include a peroxisome (P), mitochondrion (M), glycogen inclusions (GI), smooth endoplasmic reticulum (SER), and rough endoplasmic reticulum (rER). In the lower left, the membranes of the rER have been cut in a tangential plane showing the ribosomes (encircled by a dashed line) on the cytoplasmic face of the membrane. x12,000. b. This micrograph shows a region of cytoplasm near a bile canaliculus (C). It includes a lysosome (L), mitochondria (M), and both sER and rER. Note the microvilli in the bile canaliculus. x18,000. -Mv IP FIGURE 20.21. Electron micrograph of a distal convoluted tubule cell. The apical surface of the cell displays some microvilli (Mv), but they are not sufficiently long or numerous to give the appearance of a brush border (compare with Fig. 20.15). The nucleus and Golgi apparatus (G) are in the upper portion of the cell. Mitochondria (M) are chiefly in the basal region of the cell within the interdigitating processes (IP). As in the proximal tubule cell, the mitochondria account for the appearance of basal striations in the light microscope. A basal lamina (BL) is seen adjacent to the basal surface of the cell. x12,000.
Transcribed Image Text:SER SER M. rER FIGURE 18.11. Electron micrographs of a hepatocyte. a. This electron micrograph shows organelles and other cytoplasmic structures near the nucleus (N). These include a peroxisome (P), mitochondrion (M), glycogen inclusions (GI), smooth endoplasmic reticulum (SER), and rough endoplasmic reticulum (rER). In the lower left, the membranes of the rER have been cut in a tangential plane showing the ribosomes (encircled by a dashed line) on the cytoplasmic face of the membrane. x12,000. b. This micrograph shows a region of cytoplasm near a bile canaliculus (C). It includes a lysosome (L), mitochondria (M), and both sER and rER. Note the microvilli in the bile canaliculus. x18,000. -Mv IP FIGURE 20.21. Electron micrograph of a distal convoluted tubule cell. The apical surface of the cell displays some microvilli (Mv), but they are not sufficiently long or numerous to give the appearance of a brush border (compare with Fig. 20.15). The nucleus and Golgi apparatus (G) are in the upper portion of the cell. Mitochondria (M) are chiefly in the basal region of the cell within the interdigitating processes (IP). As in the proximal tubule cell, the mitochondria account for the appearance of basal striations in the light microscope. A basal lamina (BL) is seen adjacent to the basal surface of the cell. x12,000.
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