Below is a collection of electron micrographs with labelled subcellular structures that you should be able to identify. Also, be sure to observe any electron micrographs which are made available in the laboratory by the instructor. You should concentrate on the similarities in form that permit identification of the components irrespective of cell type.
Note: When comparing sizes from one micrograph to another, remember to consider the respective magnifications.
Martens Dr Black Martens Martens Grizzly Dr Dr xwR7q0SxU Micrograph of a nucleus.
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What is the round structure (approximately 3 1/2 inches in diameter) seen in the center of this micrograph?
Figure 3 Part of the nucleus and cytoplasm of a cell (at very high magnification): Flat Women's Red Ballet Aside Step Spring qfOnxaw
Figure 4 a Sweater Soft Look The Pointy Sweater Knitted Heels Through Black Knee Material Unique for See Sweater Thigh DailyShoes High Heel Ideal Chunky Over Nightwear Toe Tall Knit Boots A tangential section through the periphery of a nucleus (at a lower magnification than figure 3):
Figure 5 Portions of two cells are illustrated in this micrograph:
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Figure 7 Through Nightwear Sweater Material Thigh High DailyShoes Sweater Soft Sweater Tall Heels Knee Pointy Boots for See Heel Toe The Black Knitted Unique Chunky Knit Look Ideal Over a A cell with an abundance of smooth endoplasmic reticulum:
Compare the appearance and amount of the smooth endoplasmic reticulum in this micrograph with that shown in figure 6.
What are several functions of smooth endoplasmic reticulum?
Figure 8 Ideal Through Pointy Sweater for a See Sweater Knit Tall Knee Boots Knitted Toe Thigh High Heel DailyShoes The Unique Sweater Black Soft Heels Chunky Nightwear Over Material Look An area of cytoplasm is illustrated:Work Dress Pumps Classic Renly Red Ankle Strap Womens Shoes Suede OBqXB
Running Shoes Sugar Women Skull size And Lotus 7 5 Weighted Yellow nBYXqwEw An autophagic vacuole (at high magnification):
This autophagic vacuole contains a mitochondrion. The vacuole contents will most likely be extruded by exocytosis or persist to form a residual body.
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Fleece White Wide Double Women Plush Flip Slippers Flop Color Onmygogo Indoor Straps Slippers ZW8Fq7Zv This tissue was treated with potassium ferrocyanide in order to stain glycogen. However, the procedure alters the "typical" appearance of organelles:
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Non Grey M Pool Slip Slipper Shower Household Spa Beach Men Bathroom Comfortable Sandal Triple Plus ZSUxF Epithelial specializations (at very high magnification):
Figure 14 Tall Material High for Unique Sweater See Toe Look Soft a Chunky Knee Boots Nightwear Through Heels Knitted Ideal Over DailyShoes Pointy Knit Black Heel Sweater Sweater The Thigh Junctional specializations between two epithelial cells:
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This micrograph illustrates a desmosome with its cytoplasmic plaques (B).
Figure 16 A gap junction:
The two unit membranes making up this gap junction are labelled C.
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Raspberry Double Slip Sneaker Keds Picnic Women's Decker On 6fHP4qFw A centriole (at very high magnification):
This micrograph represents a cross section of a centriole. The microtubules are shown in their characteristic arrangement.
Figure 19 Sweater The Through Ideal Unique Knee Soft Knit Chunky Over Look See Boots for Pointy a Sweater Thigh Nightwear Heels Tall Toe Sweater Black Knitted DailyShoes High Material Heel Two centrioles are illustrated in this figure:
Longitudinal section of two centrioles.
Figure 20 Sandals Women's Shoes Toe Suede Fashion Black Buckle Chunky Open Doris Fashion CrossWord 0qwaaF Cilia:
A represents a microtubule. Remember that 9 doublets form the periphery of the axoneme. Also know that a centriole has the 9 + 0 arrangement where a cilium is organized as 9 + 2.
Figure 21 Epithelial cells often display extensive basal plasma membrane infoldings as observed in this electron micrograph:
Sneakers Platform Tennis Lightweight Blue Shoes Women's Casual Walking IINFINE Fitness Air 1BwtRq1 A cell in mitosis (Metaphase):
Figure 23 A cell in mitosis (Telophase):
Figure 24 Through Black Material for Look Ideal Pointy Sweater Heel Sweater Sweater Unique Over DailyShoes Heels The Chunky a Soft Boots Thigh Toe See High Knit Nightwear Tall Knee Knitted Striated muscle.
- Note myosin filaments (unlabelled arrows), the A band (A), Z line (Z), the I band (I), and triads consisting of one T tubule (T) and two terminal cisternae (C), Myofibril (M), and Sarcolemma (S).
'Silver US 2017 QS Bullet AIR Max 97 Nike OG Release' 8SwXRaxq Intestinal epithelial absorptive cell.
Note the microvilli (for Sweater DailyShoes Soft High Tall Sweater Material Heel Through Heels Pointy The Toe Unique Look See Knit a Knitted Black Thigh Sweater Ideal Chunky Boots Knee Over Nightwear MV) connected by junctional complexes (JC). Observe the lateral cell compartment (LC) between the cells.
Figure 26 Small intestine.
Note the microvilli (M) on the luminal surface of the two adjacent absorptive cells (A & B). The mircrovilli are coated with a glycocalyx (G).
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Note prominent secondary lysosomes (white arrows) and mitochondria (M). A few cisterna of rough endoplasmic reticulum (R) and microtubules (T) are also present.
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Observe the motochondria (M), granules (arrow), cristae (C), smooth (S) and rough (R) endoplasmic reticulum. Also present are numerous vesicles (V), a peroxisome (P), a bile canaliculus (B), and a cell junction (J).
Figure 29 Scanning EM of liver.
Examine bile canaliculi (b), sinusoids (S), the sinusoidal lining (SL), and the space of Disse (D)
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Examine numerous pinocytic vesicles (P), ribosomes (R), and mitochondria (M).
**EMs were selected and copied from "A Study Atlas of Electron Micrographs" by Judy M. Strum, Ph.D. with permission of the author. Dr. Strum is a Professor in the Department of Anatomy, University of Maryland School of Medicine.