Histology: ID Characteristics

Question 1

ID: transitional epithelium

Answer 1

1. puffy bloated surface cells 2. frequently 2 nuclei per puffy bloated surface cell

Question 2

ID: reticular tissue

Answer 2

1. disrupted reticular cells due to harshness of silver nitrate stain 2. thin black reticular fibers that branch extensively forming a meshwork or reticulum to trap microorganisms and abnormal debris

Question 3

ID: dense regular connective tissue

Answer 3

1. pink wavy parallel bundles of collagenic fibers 2. rows of elongated nuclei of fibroblasts

Question 4

ID: hyaline cartilage

Answer 4

1. matrix- homogenous, nonfibrillar appearing 2. lacunae- basophilic capsules 3. lacunae- numerous & evenly spaced 4. lacunae- often found in pairs 5. perichondrium- definite

Question 5

ID: fibrocartilage

Answer 5

1. matrix- visible, pink, wavy collagenic fibers 2. lacunae- found in rows and clusters 3. lacunae- sparse and unevenly spaced 4. perichondrium- absent

Question 6

ID: elastic cartilage

Answer 6

1. matrix- darkly stained elastic fibers 2. lacunae- numerous and evenly spaced 3. lacunae- found in pairs 4. perichondrium- definite

Question 7

ID characteristics: neutrophils

specify either band neutrophil or segmented neutrophil

Answer 7

1. specific granules color: orchid specific granules
2. nucleus: U-shaped nucleus (band neutrophil) OR nucleus segmented into lobes connected by thin filaments (segmented neutrophil)

Question 8

ID characteristics: basophils

Answer 8

1. specific granules color: blue-black specific granules
2. nucleus: nucleus obscured by large blue-black granules

Question 9

ID characteristics: eosinophils

Answer 9

1. specific granules color: pinkish-orange to red specific granules
2. nucleus: bilobed nucleus

Question 10

ID characteristics: monocytes

Answer 10

1. size compared to RBC: 4x larger than an erythrocyte
2. nucleus: large kidney-shaped or U-shaped nucleus

Question 11

ID characteristics: lymphocytes

Answer 11

1. size compared to RBC: a little larger than an erythrocyte
2. nucleus: large spherical nucleus

Question 12

ID characteristics: skeletal muscle (longitudinal section)

Answer 12

1. striations
2. multinucleated fibers
3. peripheral nuclei- nuclei located directly under sarcolemma

Question 13

ID characteristics: skeletal muscle (cross section)

Answer 13

1. multinucleated fibers
2. peripheral nuclei
3. rippled appearance of cut edges due to myofibrils

Question 14

ID characteristics: smooth muscle (longitudinal section)

Answer 14

1. lacks striations
2. spindle-shaped fibers compacted tightly together
3. mononucleated fibers
4. centrally located nucleus

Question 15

ID characteristics: smooth muscle (cross section)

Answer 15

1. neighboring fibers have different diameters

Question 16

ID characteristics: cardiac muscle (longitudinal section)

Answer 16

1. striations
2. intercalated discs- area of low electrical resistance so impulses can spread rapidly from cell to cell
3. fibers branch
4. mononucleated fibers
5. centrally located nucleus

Question 17

ID characteristics: cardiac muscle (cross section)

Answer 17

1. irregular shapes due to branching of fibers
2. more connective tissue between muscle fibers

Question 18

ID characteristics: nervous tissue

Answer 18

1. cell body- contains a large nucleus and various cell organelles
2. dendrites- usually short, highly branched extensions of the cell body that conduct nerve impulses toward the cell body
3. axon- single, usually relatively long process that conducts nerve impulses away from the cell body