Session 6: Epithelial Tissues Flashcards

1
Q

What is a mucous membrane?

A

Epithelium which lines internal tubes which open to the exterior.

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2
Q

Name 3 tracts which are lined by a mucosal membrane.

A
  1. Alimentary Tract
  2. Urinary Tract
  3. Respiratory Tract
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3
Q

What are the layers of a mucous membrane?

A
  1. Epithelial layer
  2. Lamina propia (CT)
  3. Muscularis mucosa (smooth muscle ONLY IN ALIMENTARY TRACT)
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4
Q

What is a serous membrane?

A

A thin, 2 layered membrane which lines certain closed cavities within the body.

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5
Q

Name three serous membranes.

A
  1. Peritoneum
  2. Plural sacs
  3. Pericardium sacs
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6
Q

What layers does serous membrane consist of?

A
  1. Simple squamous epithelium (MESOTHELIUM)

2. thin layer of CT

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7
Q

Define basement membrane.

A

Thin, flexiable, acellular layer between epithelium and CT

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8
Q

Name 3 locations of simple squamous.

A
  1. Lining of vessels/ body cavities
  2. Bowmans capsule (kidney)
  3. Alveoli
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9
Q

Name 3 locations of simple cuboidal.

A
  1. Kidney tubules
  2. Thyroid
  3. Ovaries
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10
Q

Name a 3 locations of simple columnar.

A
  1. Small intestine (microvilli)
  2. Colon
  3. Stomach
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11
Q

Name a location of pseudo-stratified epithelium.

A

URT

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12
Q

Name 3 locations of stratified squamous.

A
  1. Where ever you can put you ** in

2. Inner Eye lid

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13
Q

Name a location of keratinised stratified squamous.

A

Epidermis

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14
Q

Name the 4 layers of the epidermis.

A
  1. Horny layer
  2. Granular layer
  3. Prickle cell layer
  4. Basal layer
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15
Q

What occurs in the basal layer of the epidermis?

A

Keratinocytes divide by mitosis

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16
Q

What occurs in the prickle cell layer of the epidermis?

A

Keratinocytes loose their ability to divide

17
Q

What occurs in the granular layer of the epidermis?

A
  • keratinocytes loose their plasma membranes

- differentiate into corneocytes

18
Q

What is horny layer of the epidermis made of?

A

Flattened Corneocytes

19
Q

Which layer of the epidermis are melanocytes found?

A

Basal layer

20
Q

Where do melanocytes originate from?

A

Neural crest

21
Q

What is the function of melanocytes?

A

Produce melanin (more pigment is produced in black people)

22
Q

Where do langerhan cells originate?

A

Bone marrow

23
Q

Which layer of the epidermis are langerhan cells found?

A

Prickle cell layer

24
Q

What is the function of langerhan cells?

A

Present antigens to T lymphocytes

25
Q

Name a location of transitional epithelium.

A

Bladder