Ch. 3 Flashcards

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1
Q

What are the four types of tissues?

A
  1. Epithelial
  2. Connective
  3. Muscle
  4. Neural
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2
Q

What are the functions of Epithelial tissue?

A
  • Protect surfaces
  • Control permeability
  • Provide sensation
  • Secretion-> glandular epithelium
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3
Q

What are the two layers of the Basal Lamina?

A
  1. Lamina lucida- connected to the epithelial cell
  2. Lamina densa- deeper layer attached to the underlying connective tissue
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4
Q

What is mesothelium?

A

Used to describe the simple squamous epithelium that lines the anterior body cavities

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5
Q

What is Endothelium?

A

Describes the simple squamous epithelium lining the inner chambers of the heart and inner most layer of blood vessels

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6
Q

What are the 6 characteristics of epithelial tissue?

A
  • Polarity
  • Cellularity
  • Basal Lamina
  • Avascularity
  • Arranged in sheets
  • High mitotic rate
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7
Q

Where is simple epithelium found in the body?

A
  • In protected areas inside of the body-> thoracic, abdominal, pelvic cavities, chambers of the heart, and ALL blood vessels
  • Also found where secretion, absorption, or filtration occurs-> the lining of the intestines and gas exchange surfaces of the lungs
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8
Q

Where is stratified epithelium found in the body?

A
  • Occur in areas where mechanical or chemical stresses are severe-> the surface of the skin and the lining of the oral cavity
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9
Q

Where are simple squamous epithelium found?

A
  • Mesothelia lining pleural, pericardial, and peritoneal cavities
  • Endothelia lining heart and blood vessels
  • Portions of kidney tubules
  • Inner lining of cornea
  • Alveoli of lungs
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10
Q

What are the functions of simple squamous epithelium?

A
  • Reduces friction
  • Controls vessel permeability
  • Performs absorption and secretion
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11
Q

Where are stratified squamous epithelium found?

A
  • Surface of skin
  • Lining of oral cavity, throat, esophagus, rectum, anus, and vagina
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12
Q

What are the functions of stratified squamous epithelium?

A

Provides physical protection against abrasion, pathogens, and chemical attack

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13
Q

Where are simple cuboidal epithelium found?

A

Glands; ducts; portions of kidney tubules; thyroid gland

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14
Q

What are the functions of simple cuboidal epithelium?

A
  • Limited protection
  • Secretion
  • Absorption
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15
Q

Where is stratified cuboidal epithelium found?

A

Lining of some ducts (RARE epithelia)

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16
Q

What are the functions of stratified cuboidal epithelium?

A
  • Protection
  • Secretion
  • Absorption
17
Q

Where is simple columnar epithelium found?

A

Lining of stomach, intestine, gallbladder, uterine tubes, and collecting ducts of kidneys

18
Q

What are the functions of simple columnar epithelium?

A
  • Protection
  • Secretion
  • Absorption
19
Q

Where is stratified columnar epithelium found? (RARE)

A

Small areas of the pharynx, epiglottis, anus, mammary glands, salivary gland ducts, and urethra

20
Q

What is the function of stratified columnar epithelium?

A

Protection

21
Q

Where is pseudostratified ciliated columnar epithelium found?

A
  • Lining of nasal cavity, trachea, and bronchi
  • Portions of male reproductive tract
22
Q

What are the functions of pseudostratified ciliated columnar epithelium?

A
  • Protection
  • Secretion
23
Q

Where is transitional epithelium found?

A
  • Urinary bladder
  • Renal pelvis
  • Ureters
24
Q

What are the functions of transitional epithelium?

A

Permits expansion and recoil after stretching

25
Q

How are glandular epithelia classified?

A
  1. Type of secretion they release
  2. Structure of the gland
  3. Method of secretion
26
Q

What two types may glandular epithelia be?

A
  1. Exocrine
  2. Endocrine
27
Q

What are the three types of exocrine glandular epithelia?

A
  1. Serous glands
  2. Mucous glands
  3. Mixed exocrine glands
28
Q

How do exocrine glands release their secretions onto an epithelial surface?

A

Through epithelial DUCTS

29
Q

How do endocrine glands release their secretions?

A

They are DUCTLESS glands that release their secretions by exocytosis directly into the interstitial fluid surrounding the cell

30
Q

What are the modes of secretion for exocrine glands?

A
  1. Apocrine
  2. Merocrine (Aka eccrine)
  3. Holocrine
31
Q

What are glandular epithelia?

A

Gland cells in the epithelia that produce secretions

32
Q

What do serous glands secrete?

A

A watery solution that usually contains enzymes, such as the salivary amylase in saliva

33
Q

What do mucous glands secrete?

A

Secrete glycoproteins called mucins that absorb water to form a slippery mucus, such as the mucus in saliva

34
Q

What can mixed exocrine glands secrete?

A

Contain more than one type of gland cell and may produce both serous and mucous secretions

35
Q

What are the secretions produced by endocrine glands called?

A

Hormones

36
Q

What is eccrine (aka merocrine) secretion?

A

The secretory product, packaged into secretory vesicles, is released through exocytosis onto the surface of the cell

37
Q

What is apocrine secretion?

A

The secretory product is released during the shedding of the apical portion of the cell’s cytoplasm, which has become packed with secretory vesicles

38
Q

What is holocrine secretion?

A

Destroys the gland cell. During holocrine secretion, the entire cell becomes packed with secretory products and then bursts apart-> secretion is released and the cell dies