Session 6: Epithelial Tissues

Question 1

What is a mucous membrane?

Answer 1

Epithelium which lines internal tubes which open to the exterior.

Question 2

Name 3 tracts which are lined by a mucosal membrane.

Answer 2

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

Question 3

What are the layers of a mucous membrane?

Answer 3

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

Question 4

What is a serous membrane?

Answer 4

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

Question 5

Name three serous membranes.

Answer 5

1. Peritoneum
2. Plural sacs
3. Pericardium sacs

Question 6

What layers does serous membrane consist of?

Answer 6

1. Simple squamous epithelium (MESOTHELIUM)

2. thin layer of CT

Question 7

Define basement membrane.

Answer 7

Thin, flexiable, acellular layer between epithelium and CT

Question 8

Name 3 locations of simple squamous.

Answer 8

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

Question 9

Name 3 locations of simple cuboidal.

Answer 9

1. Kidney tubules
2. Thyroid
3. Ovaries

Question 10

Name a 3 locations of simple columnar.

Answer 10

1. Small intestine (microvilli)
2. Colon
3. Stomach

Question 11

Name a location of pseudo-stratified epithelium.

Answer 11

URT

Question 12

Name 3 locations of stratified squamous.

Answer 12

1. Where ever you can put you ** in

2. Inner Eye lid

Question 13

Name a location of keratinised stratified squamous.

Answer 13

Epidermis

Question 14

Name the 4 layers of the epidermis.

Answer 14

1. Horny layer
2. Granular layer
3. Prickle cell layer
4. Basal layer

Question 15

What occurs in the basal layer of the epidermis?

Answer 15

Keratinocytes divide by mitosis

Question 16

What occurs in the prickle cell layer of the epidermis?

Answer 16

Keratinocytes loose their ability to divide

Question 17

What occurs in the granular layer of the epidermis?

Answer 17

• keratinocytes loose their plasma membranes

- differentiate into corneocytes

Question 18

What is horny layer of the epidermis made of?

Answer 18

Flattened Corneocytes

Question 19

Which layer of the epidermis are melanocytes found?

Answer 19

Basal layer

Question 20

Where do melanocytes originate from?

Answer 20

Neural crest

Question 21

What is the function of melanocytes?

Answer 21

Produce melanin (more pigment is produced in black people)

Question 22

Where do langerhan cells originate?

Answer 22

Bone marrow

Question 23

Which layer of the epidermis are langerhan cells found?

Answer 23

Prickle cell layer

Question 24

What is the function of langerhan cells?

Answer 24

Present antigens to T lymphocytes

Question 25

Name a location of transitional epithelium.

Answer 25

Bladder