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Microanatomy > Quiz 1: Cytology, Epithelium, Connective I) > Flashcards

Quiz 1: Cytology, Epithelium, Connective I) Flashcards

1
Q

What is the most common fixative?

A

Formalin

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2
Q

Formalin is a saturated solution of _________ gas in ______

A

Formaldehyde; water

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3
Q

The formalin aqueous solution is _______ so it is buffered with ____ like sodium phosphates or sodium acetate

A

Acidic; salts

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4
Q

How long should you fixate a sample?

A

24 hours- 3 days

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5
Q

After the sample is fixated in formalin for the proper amount of time, the tissue blocks are _________ in a series of increased concentration of alcohol (70%, 95%, 100%)

A

Dehydrated

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6
Q

After all of the water is removed in a tissue sample, they are treated with a ______ ______ like xylene

A

Clearing Agent

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7
Q

The cleared tissues are processed through three changes of molten ________ and embedded in paraffin blocks

A

paraffin

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8
Q

The paraffin blocks are mounted on metal chucks and slices are cut at a thickness of ____-____ micrometers on a instrument called a _______

A

5-10; microtome

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9
Q

The paraffin sections are mounted on slides and then the paraffin is removed in _______ and the sections are stained and covered with a thin glass ______

A

Xylene; coverslip

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10
Q

What stain type stains the nucleus purple and is the most commonly used dye? What stain makes the cytoplasm stained pink? These two stains are often paired together.

A

Hematoxylin; Eosin; H&E

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11
Q

What stain type is used to identify the carbohydrate moiety of carbohydrate/protein complexes? ; appear to be red or pink

A

Periodic Acid-Schiff (PAS) Reagent

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12
Q

What stain type has 2 contrasting cytoplasmic stains and the hematoxylin nuclear stain? These stains make connective tissue a blue or green color and muscle and epithelium turn a pale buff color.

A

Trichrome Stains

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13
Q

What process takes molecules or organelles from the inside of the cell and expels them outward through the cell membrane?

A

Exocytosis

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14
Q

What process brings bulk volume into the cell? This involves no opening of the cell membrane, but instead the pseudopodia surround the molecule from the outside and fuse to bring it into the cell.

A

Endocytosis

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15
Q

What are the 3 types of endocytosis?

A
  1. Receptor-Mediated Endocytosis
  2. Pinocytosis
  3. Phagocytosis
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16
Q

What process requires a receptor on the surface of the cell membrane to concentrate some material to be brought into the cell (ex: cholesterol)?

A

Receptor-Mediated Endocytosis

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17
Q

What process is also known as cell drinking and allows fluid to be brought in through the vacuole?

A

Pinocytosis

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18
Q

What process is also called cell eating and takes actual debris like bacteria from outside the cell to the inside to be broken down?

A

Phagocytosis

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19
Q

What process involves organelles be enclosed in the membrane and digested also called self eating?

A

Autophagy

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20
Q

What do Autophagosomes do?

A

They encapsulate the dying or defective organelle to create a pathway that delivers the organelle to the lysosome to digest

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21
Q

What are the three main components of cell membranes?

A
  1. Lipid Membrane
  2. Proteins
  3. Carbohydrate exterior surface
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22
Q

What is the purpose and structure of the lipid membrane?

A

They provide a barrier to water, hydrophilic molecules, and large molecules with their bilayer composed of both hydrophilic and hydrophobic components. They can also act as messengers

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23
Q

What are the three functional types of proteins typically found in the cell membrane?

A

Channel Proteins, Enzymes, and Receptors

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24
Q

What is the function of the proteins on the cell membrane?

A

They are how certain molecules get into the cell

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25
Q

What structural type of protein is a channel protein?

A

Integral transmembrane protein

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26
Q

What structural type of protein is an enzyme? (2 possible answers)

A

Either peripheral or integral

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27
Q

What structural type of protein is a receptor?

A

Integral transmembrane

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28
Q

What is the function of Glycocalyx and where is it located?

A

They are highly protective carbohydrates located on the outer portion of the cell membrane. They aid in target recognition and act as receptors

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29
Q

What are the three functions of the cell membrane?

A
  1. Selective Barrier
  2. Selective Transport
  3. Sensor- receptors
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30
Q

What are transmembrane proteins?

A

Proteins that span the whole length of the cell membrane allowing a channel from inside to outside and vice versa (a type of integral protein)

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31
Q

What are peripheral proteins?

A

Proteins that are not anchored to the cell membrane and are located by the hydrophilic portion of the lipid bilayer

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32
Q

What are intrinsic (integral) proteins?

A

Proteins anchored to the membrane in some form and can be on either the extracellular or intracellular side or an span the whole length (transmembrane)

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33
Q

What type of DNA is dispersed and active? DNA in this form is highly exposed and transcription can occur very easily.

A

Euchromatin

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34
Q

What type of DNA is protected from transcription and is very dense and inactive? Can be easily identified under a microscope.

A

Heterochromatin

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35
Q

What is the function of the nucleolus?

A

The site of rRNA synthesis and partial ribosomal subunit assembly

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36
Q

What is the central, pale-staining region of the nucleolus that contains the genes for rRNA?

A

Nucleolar Organizer

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37
Q

The transcription of rRNA yields the formation of the _________ around the nuclear organizer.

A

Nucleolus

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38
Q

The nuclear envelope contains openings called nuclear pores. What is their function?

A

Allows small molecules to pass in and out of the nucleus like RNA

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39
Q

What type of ribosome synthesizes proteins for intracellular use? What is its name when it is bound to a mRNA strand?

A

Free Ribosome; Polysome

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40
Q

What organelle functions primarily in protein synthesis and secretion?

A

Rough (Granular) Endoplasmic Reticulum

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41
Q

Where can the proteins made by the RER end up?

A

Outside the cell (exported), into the cell membrane (integral), or used inside the cell itself (intracellular)

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42
Q

The ER membrane is a single/double compartment?

A

Single

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43
Q

What organelle is the site of steroid synthesis, detoxification in the liver, and calcium storage in the muscle?

A

Smooth (agranular) Endoplasmic Reticulum

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44
Q

The fold of the SER increase the _______ ______

A

Surface area

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45
Q

What organelle is used for packaging of proteins into different vesicles for transport, carbohydrate modification, lipid synthesis and reconstitution; AKA packaging facility

A

Golgi Apparatus

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46
Q

What organelle is a membrane enclosed vesicle that contains hydrolytic enzymes to be used in intracytoplasmic digestion?

A

Lysosomes

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47
Q

What is a primary lysosome?

A

A golgi product that only contains digestive enzymes; digestion itself has not occurred and it has not fused with any molecules or organelles

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48
Q

What is a secondary lysosome?

A

The site of any digestive activity; the fusion of any product (phagosome or endosome) with the primary lysosome to be digested

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49
Q

What is it called when waxy material is not digested well in the lysosome and is thus “left over”

A

Residual Bodies

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50
Q

What organelle contains the enzymes if the citric acid cycle and the fatty acid oxidation cycles to synthesize ATP via oxidative phosphorylation?

A

Mitochondria

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51
Q

Inter means ______

A

between

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52
Q

Intra means _____

A

within

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53
Q

What is the space between the inner and outer mitochondrial membranes that create the hydrogen (proton) gradient across the inner membrane?

A

Intermembrane Space

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54
Q

What is the function of the inter mitochondrial membrane?

A

They extend into cristae and are studded with ATP synthase complexes to use the proton gradient to synthesize ATP

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55
Q

What part of the mitochondria is enclosed by the inner mitochondrial membrane and cristae that contain the citric acid cycle enzymes and fatty acid oxidation

A

Matrix

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56
Q

Give 3 examples of cells where mitochondria is most abundant

A
  1. Ciliated epithelial cells
  2. Midpiece of the spermatozoa
  3. Base of ion-transporting cells of kidney
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57
Q

What is the structure and function of microfilaments in the cytoskeleton?

A

Mainly composed of actin proteins; Contraction; endocytosis, exocytosis, cell migration, structural framework (terminal web), microvilli movement

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58
Q

What is the structure and function of microtubules in the cytoskeleton?

A

Composed of tubulin proteins subunits; cell shape, transport using dynein and kinesin, cell motility (cilia, flagella)

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59
Q

What is the structure and function of intermediate filaments?

A

Very cell specific and can be used as markers for tumor origin; provide structure

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60
Q

What is the term used for deposits of material for metabolic use in the cell?

A

Cytoplasmic inclusions

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61
Q

What are each of the following cytoplasmic inclusions used for?
1. Lipid droplets
2. Carbohydrate accumulations
3. Pigments
4. Residual Bodies

A
  1. Cholesterol precursor for steroid hormone synthesis
  2. Glycogen in hepatocytes, myocytes
  3. Melanin granules
  4. Lipofuscin
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62
Q

What is a collection of cells and intercellular substances organized to perform a particular function?

A

Tissue

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63
Q

What are the four types of tissues?

A
  1. Epithelium
  2. Connective Tissue
  3. Nervous Tissue
    4, Muscle
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64
Q

What type of epithelium covers organs and lines free surfaces?

A

Surface Epithelium

65
Q

What type of epithelium lines secretory cells of glands?

A

Glandular Epithelium

66
Q

What is the function of connective tissue?

A

Binds other tissues together

67
Q

What is true of all epithelial tissues?

A
  1. Free surface above
  2. Attached below to a basal lamina
  3. Derive from all three embryonic layers
  4. Protective
  5. used for absorption or secretion
  6. cells fit tightly together
  7. avascular tissue
68
Q

What are the three embryonic layers from which epithelial tissues derive and where is each located?

A
  1. Ectoderm- the epithelium of the skin
  2. Endoderm- the lining of the GI and respiratory tracts
  3. Mesoderm- endothelium and mesothelium
69
Q

What is simple epithelium?

A

1 cell layer thick

70
Q

Describe the structure of simple squamous epithelium

A

They are wider than they are tall; very flat looking; 1 cell layer all touching the basal lamina

71
Q

Endothelium is a type of simple squamous epithelium. Where is this located?

A

Lines the blood vessels, circulatory system, lymph nodes

72
Q

Mesothelium is a type of simple squamous epithelium. Where is this located?

A

Lines all closed body cavities; covers all organs within the body cavity

73
Q

Describe the structure of simple cuboidal epithelium

A

Height is equal to the width; 1 cell layer all connecting the basal lamina

74
Q

What type of epithelia is found lining the ducts of glands like the salivary gland or the ducts of the kidneys?

A

Simple Cuboidal Epithelium

75
Q

Describe the structure of simple columnar epithelium.

A

Taller than they are wide; 1 cell layer thick and connect to the basal lamina

76
Q

What type of epithelia lines organs with active secretory and/or absorptive functions like the intestinal tract or gall bladder?

A

Simple Columnar Epithelium

77
Q

What type of epithelium is often modified with secretory goblet cells and/or microvilli?

A

Simple Columnar Epithelium

78
Q

Describe the structure of pseudostratified epithelium

A

All cells contact the basement lamina, but some do not reach the free surface

79
Q

What are the 2 types of pseudostratified epithelium?

A
  1. Pseudostratified Columnar Epithelium
  2. Transitional Epithelium
80
Q

What type of epithelia lines the respiratory tract and reproductive tract?

A

Pseudostratified Columnar Epithelium

81
Q

What type of epithelia lines the urinary bladder, ureters, and urethra?

A

Transitional Epithelium

82
Q

Describe the structure of transitional epithelium

A

Cells will increase in size from the basal to superficial layers; surface cells often have a pillow shape; no distinct layer of cells on the top

83
Q

What type of epithelia is rich in surface modifications?

A

Columnar

84
Q

Microvilli+Glycocalyx=

A

Brush Boarder

85
Q

What is the function of microvilli?

A

Increase surface area to aid in absorption

86
Q

What holds microvilli to the cell?

A

Actin filaments anchored to the terminal web

87
Q

What membrane extension is very long, branched like microvilli, but line the epididymis or provide the “hair cells” of the ear canal?

A

Stereocilia

88
Q

What membrane extension is used for motility, uses dynein arms to help move, and is a uniform height?

A

Cilia

89
Q

What is the only impermeable junction with no intermembrane gap that runs along the whole length of the cell with belts of adhesion? Also known as Zonula Occludens.

A

Tight Junction

90
Q

What is a type of adhering junction that encircles the apex of the cell to create the terminal web and terminal bar for mechanical strength?

A

Zonula Adherens

91
Q

What is a type of adhering junction that is disk shaped on the membrane, and form between cells to hold them together? Also known as Macula Adherens.

A

Desmosome (both halves)

92
Q

What is a type of communicating junction that is bridged by connexons to aid in intercellular communication and nutrition? Also called Nexus

A

Gap Junctions

93
Q

What is the section of the cell that is a portion of the cell membrane that is below the impermeable junctions and faces the extracellular fluid compartment?

A

Basal Membrane

94
Q

What section of the membrane in epithelium contains the Na/K Pump, hormone receptors, and vesicles?

A

Basal Membrane

95
Q

What section of the membrane in epithelium is in contact with the interstitial fluid?

A

Basal Membrane

96
Q

What section of the membrane in epithelium is in contact with the extracellular fluid?

A

Basement Membrane/Basal Lamina

97
Q

What tacks the cell to the basement membrane?

A

Hemidesmosome (1 half of a desmosome)

98
Q

The basement membrane has two parts what are they and what secretes each?

A
  1. Basal Lamina- secreted by epithelium
  2. Reticular Lamina- Secreted by connective tissue
99
Q

Describe the structure of stratified squamous epithelium.

A

Surface cells are flat (what gives it its name); top cells do not touch the basement membrane

100
Q

What is the purpose of nonkeratinized stratified squamous epithelium?

A

These cells face wet surfaces and don’t need protection from water loss

101
Q

What is the purpose of keratinized stratified squamous epithelium?

A

These cells need a surface layer of dead cells without nuclei, filled with keratin filaments to provide protection from being in an abrasive location

102
Q

What type of epithelium is in a dog’s esophagus?

A

Nonkeratinized Stratified Squamous Epithelium

103
Q

What is the layer of cells that is resting on the basal lamina and generates new cells? Has a hill like pattern to provide increased surface area for attachment to the basement membrane.

A

Stratum Basale

104
Q

What is the layer of cells that is composed of several cell layers and is used for strength in the cell?

A

Stratum Spinosum

105
Q

What is the layer of epithelium cells that is only a few cells thick, and is a product of the keratinization process?

A

Stratum Lucidum

106
Q

What is the layer of epithelium cells that is only in keratinized regions, and helps regenerate the keratin layer?

A

Stratum Granulosum

107
Q

What is the layer of epithelium cells that is the dead layer of cells with no nuclei visible and provides extreme protection?

A

Stratum Corneum

108
Q

What is the name of the flaking pieces of keratin in the stratum corneum layer?

A

Stratum Disjunction

109
Q

T or F: Keratin can be soft and hard

A

True; found in both the claw/hoof and the epidermis

110
Q

T or F: Cytokeratins and desmosomes are found only in keratinizing epithelium

A

False; it is in both keratinized and nonkeratinized

111
Q

T or F: Keratinization begins in the Stratum Spinosum layer

A

True

112
Q

What type of epithelium is in large excretory ducts of glands like the esophageal glands?

A

Stratified Cuboidal/Columnar Eipthelium

113
Q

What is the epithelium that consists of the secretory cells of both exocrine and endocrine glands that result from the proliferation of surface epithelial cells into the underlying connective tissue?

A

Glandular Epithelium

114
Q

What consists of glandular epithelium or may include a complex duct system lined by surface epithelium and supportive framework of connective tissue?

A

Gland

115
Q

What category of gland secretes their product into the lumen through a duct?

A

Exocrine

116
Q

What category of gland secretes their product to the extracellular fluid and is picked up through the bloodstream? “ductless”

A

Endocrine

117
Q

Exocrine glands that are categorized by morphological differences: this type of glandular epithelium is a unicellular gland that produces mucin and is largely found in the respiratory and digestive systems.

A

Goblet Cells

118
Q

Exocrine glands that are categorized by morphological differences: this type of glandular epithelium is a type of surface epithelium that contain only secretory cells like in the cervix of a cow.

A

Secretory Epithelium

119
Q

Exocrine glands that are categorized by morphological differences: this type of glandular epithelium is a broad term for exocrine glands that have their own secretory units that empty into a single, unbranched duct.

A

Simple Glands

120
Q

What type of simple gland consists of straight secretory units which empty directly into the lumen of the organ?

A

Simple Tubular Glands

121
Q

What type of simple gland consists of a number of secretory units that share an opening to the duct of a gland?

A

Branched Tubular Glands

122
Q

What type of simple gland consists of a highly coiled terminal portion and a straight segment which opens to the surface? This type is found in some glands of the skin like the ear canal.

A

Coiled Tubular Glands

123
Q

What type of simple gland is very similar to simple tubular glands, but has a different shape that resembles a grape? This type empties into one unit like a hair follicle.

A

Simple Acinar Gland

124
Q

What type of exocrine gland empties its product into a largely branched duct system?

A

Compound Gland

125
Q

What type of compound gland is fairly large and is lined with either simple or stratified epithelium and its function is to convey its secretory product to its site of action?

A

Excretory Duct

126
Q

What type of compound gland is located within the lobule and may contribute to the secretory product of the gland?

A

Secretory Ducts

127
Q

What type of compound gland horizontally connects the acini with the secretory ducts?

A

Intercalated Ducts

128
Q

What is the term for a gland with one or more lobes?

A

Large Gland

129
Q

What is the term for a duct that drains into a lobe?

A

Lobar Duct

130
Q

What is the term for a smaller division of a lobe?

A

Lobules

131
Q

What is the term for a duct that drains into a lobule when within the lobule?

A

Intralobular duct

132
Q

What is the term for a duct that drains a lobule when located in the connective tissue septa between the lobules?

A

Interlobular duct

133
Q

What is the term for a total secretory epithelial component of a compound gland?

A

Parenchyma

134
Q

What is the term for the connective tissue components of the compound gland?

A

Stroma

135
Q

Exocrine glands that are categorized by the nature of the secretory product: What type of unit is where all the cells secrete mucin and have a characteristic structure and are usually columnar or cuboidal?

A

Mucous Secretory Unit

136
Q

Exocrine glands that are categorized by the nature of the secretory product: What type of unit produces more of a watery type of product and have prominent secretory granules in the cytoplasm; pyramidal in shape?

A

Serous Secretory Unit

137
Q

Exocrine glands that are categorized by the nature of the secretory product: What type of unit contains both mucous and serous cells that empty their product into very small canals called intercellular canaliculi?

A

Mucoserous Secretory Unit or Mixed Unit

138
Q

What is a acinus refer to?

A

A secretory unit with a very small lumen

139
Q

What does an alveolus refer to?

A

Describes a secretory unit with a very large lumen

140
Q

Exocrine glands that are categorized by the mode of release of the secretory product: What is the term when the product is released without much visible change in the integrity of the cell like in exocytosis?

A

Merocrine

141
Q

Exocrine glands that are categorized by the mode of release of the secretory product: What is the term for when release causes large bits of cytoplasm to be pinched off from the cell and pass into the lumen of the gland?

A

Apocrine

142
Q

Exocrine glands that are categorized by the mode of release of the secretory product: What is the term for when release causes the entire cell to be lost like in the sebaceous gland secreting sebum?

A

Holocrine

143
Q

What are the major types of connective tissue?

A

Connective Tissue Proper, cartilage, bone, blood, and bone marrow

144
Q

What is the function of connective tissue?

A

Connects all other basic tissue types and provides support of the body weight

145
Q

Where does connective tissue originate from?

A

Mesoderm

146
Q

Connective tissue is composed of three elements. What are they?

A

Cells, Fibers, and Ground Substance

147
Q

Fibers+Ground Substance= _______

A

Matrix

148
Q

What is the type of fixed cell in connective tissue that produces the stem cells to be differentiated into specific CT types?

A

Mesenchymal

149
Q

What type of fixed cell in connective tissue synthesizes the fibers and ground substance and is used for wound repair?

A

Fibroblasts

150
Q

What is the dormant version of a fibroblast?

A

Fibrocyte

151
Q

What type of fixed cell in connective tissue produces reticular fibers used to suspend another cell type?

A

Reticular cells

152
Q

What type of fixed cell in connective tissue is a fat cell that is in all loose connective tissue?

A

Adipocytes

153
Q

What type of fixed cell in connective tissue encircles the capillaries and supports the endothelial cells; can be differentiated into smooth muscle cells or adipocytes?

A

Pericytes

154
Q

What type of fixed cell in connective tissue are difficult to distinguish from fibroblasts and migrate to connective tissue from the blood and become stationary?

A

Fixed Macrophages

155
Q

What is a type of wandering cell in loose connective tissue that is the active version of fixed macrophages that helps repair by ingesting debris and invading microorganisms?

A

Free Macrophage

156
Q

What type of wandering cell in loose connective tissue produces antibodies and secretes the circulating antibodies?

A

Plasma Cells

157
Q

What type of wandering cell in loose connective tissue releases granules when antibodies bind to an antigen?

A

Mast Cells

158
Q

What type of wandering cell is part of an immune reaction and is used for phagocytosis in the antibody-antigen complexes and can release granules to kill parasitic worms?

A

Eosinophils

Microanatomy (1 decks)

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