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Flashcards in Tissues 2 Deck (26)
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1
Q

Define exocrine glands.

A

Epithelium vagilates and makes a tube from the surface, excreting substances to the surface i.e sweat glands.

2
Q

Define endocrine glands.

A

Lose contact with the surface and become a mass of specialised cells, accumulating around blood vessels. Secrete hormones through the body via blood.

3
Q

What is the structure of exocrine glands?

A

Tubular (secretes watery solutions) and acinar (secretes mucus) are simple, and tubuloacinar is compound.

4
Q

Define mucous glands.

A

Secrete mucus.

5
Q

Define mucus.

A

Mix of water and proteoglycans.

6
Q

Define serous glands.

A

Protein rich secretion.

7
Q

Define myoepithelial cells.

A

Special cells which are muscle and can contract to get mucus out from exocrine glands.

8
Q

What type of tissue are endocrine glands made of?

A

Cuboidal epithelial.

9
Q

What do the endocrine glands usually secrete?

A

Proteins and steroids.

10
Q

Define parenchyma.

A

Functional tissue of an organ.

11
Q

Define hepatocytes.

A

Arranged in rows between blood vessels and have numerous functions such as secretion.

12
Q

What do support epithelial cells do in the liver?

A

Line blood vessels and bile ducts.

13
Q

What are epithelial cells organised into in the kidney?

A

Nephrons.

14
Q

What is the function of the kidney?

A

Filtration of blood and release of urine.

15
Q

What do support epithelial cells do in the kidney?

A

Line blood vessels and renal pelvis which receives toxic urine.

16
Q

Name 5 abnormal functions of epithelial cells.

A
Over proliferation
Under proliferation
Over secretion
Under secretion
Loss of cilia
17
Q

What is proliferation?

A

Rapid reproduction of a cell, part, or organism

18
Q

Name 3 examples of connective tissue.

A
Blood/bone marrow
Mucous
Reticular
Loose
Dense irregular
Dense regular
Cartilage
Bone
Adipose
19
Q

What is the extracellular matrix?

A

Made of fibres, ground substance and tissue fluid. It can be insoluble like collagen or jelly like. Helps with the mechanical support of the surrounding cells.

20
Q

Name the 3 types of fibres.

A

Collagen - i.e tendon, bendy but not stretchy
Elastic - i.e aorta, contracts
Reticular - i.e lymph, network of fibrous materials in an irregular material

21
Q

Collagen makes up about _____% of your body weight and there are around ____ types.

A

30, 19.

22
Q

Describe the formation of collagen.

A

Fibroblast –> Collagenase –> Triple Stranded Helix –> Collagen fibril –> Collagen fibre

23
Q

What is the ground substance of the extracellular matrix made of?

A

Proteoglycans, hyaluronic acid, glycoproteins

24
Q

Name 5 types of loose connective tissue.

A
Fibroblasts
Macrophages
Adipocytes
Mast cells
Undifferentiated mesenchyme cells
25
Q

Define dense, regular connective tissue.

A

Really thick will small gaps in between e.g tendons

26
Q

Define dense, irregular connective tissue.

A

Not orderly e.g sebaceous gland.