2.4 Membranes

Question 1

Membrane def

Answer 1

FLAT sheets of flexible tissue that cover or line parts of the body

Question 2

2 types of membranes

Answer 2

Epithelial
Synovial

Question 3

Epithelial membrane

Answer 3

Lining epithelium + underlying lamina propria
(connective tissue):
- Mucous
- Serous
- Cutaneous or skin

Question 4

Synovial membrane

Answer 4

Lining joints. They only contain connective tissue.

Question 5

Where is mucosa

Answer 5

organ cavities which open directly to the exterior (mouth, stomach, vagina, urethra…)

Question 6

Mucus secreted by…

Answer 6

Goblet cells

Question 7

Mucus function

Answer 7

Prevents cavities from drying
Also defense against microorganisms and effects of acids.

Question 8

Mucous membranes made of

Answer 8

Epithelium

Lamina propia

Question 9

Epithelium of mucous membranes

Answer 9

Strong intercellular links: tight junctions: prevent leakage
of substances. Protect from pathogens.

Question 10

Lamina propia def and function

Answer 10

AREOLAR connective tissue (vascularized and innervated)
Support-stability-protection.

Question 11

Serous membrane also called

Answer 11

Serosa

Question 12

Where is serosa found

Answer 12

organ cavities which DO NOT open directly to the exterior
(pleura, peritoneum and pericardium)

Question 13

Types of cells and tissue of serosa

Answer 13

Simple squamous epithelium (mesothelium) + areolar connective tissue

Question 14

Two layers of serosa

Answer 14

Parietal layer (external)
Visceral layer (interior: attached to cavity organs)

Question 15

Function serous membrane

Answer 15

Epithelial cells secrete a lubricating fluid to reduce friction from muscle movements
(pleural, pericardial or peritoneal fluid)

Inflammation of the serous membrane with an increase in fluid
secretion =-itis.

Question 16

Cutaneous membrane layers

Answer 16

Epidermis
Dermis

Question 17

Epidermis

Answer 17

keratinized stratified squamous epithelium

Question 18

Dermis

Answer 18

dense irregular connective tissue and areolar connective tissue

Question 19

Where are synovial membranes found

Answer 19

line the cavities of free movable joints. Bursae and tendon sheaths
(they do not open to the exterior)

Question 20

Tissue synovial membrane

Answer 20

Areolar and adipose connective tissue

Question 21

Difference synovial membrane and serosa

Answer 21

No epithelial cells

Question 22

Specialized cells of synovial membranes

Answer 22

Synoviocytes which secrete synovial fluid:
a) lubricant.
b) nutritive (avascular cartilage/ vascularized synoviocytes)
c) defense: macrophages.

Question 23

Alterations in the mucosa of oral cavity

Answer 23

Changes in normal structure
Periodontal disease
Bacterial or viral infection
Dermatological diseases

Question 24

Changes in normal structure

Answer 24

Fissured tongue, medial rhomboid glossitis, lingual varicosities.

Question 25

Periodontal disease

Answer 25

Periodontitis, gingival hyperplasia

Question 26

Bacterial or viral infection

Answer 26

Herpes, candida

Question 27

Dermatological disease

Answer 27

Lichen plans, erythema multiforme