b3-unit 1

Question 1

what are epithelial tissues?

Answer 1

tissues that lines the surface of all organs and structures within the body

Question 1

what are the three types of epithelial tissues?

Answer 1

squamous
columnar
endothelial

Question 2

where are squamous tissues found?

Answer 2

in the lining of the alveoli

Question 3

how do squamous cells help lining the alveoli in the lungs?

Answer 3

they provide a short diffusion pathway to allow rapid diffusion of oxygen into the blood and carbon dioxide into the lungs

Question 4

what are the adaptations of squamous epithelial tissues?

Answer 4

one cell thick
made from flattened specialised squamous epithelial cells, which form thin, smooth flat layer(s) that makes it ideal for rapid diffusion

Question 5

where are ciliated columnar epithelial tissues found?

Answer 5

lining of the trachea

Question 6

what do ciliated columnar tissues contain?

Answer 6

goblet cells

Question 7

how does cilia and goblet cells work togetherto protect the lungs?

Question 8

how can squamous epithelial tissues be damaged by smoking?

Answer 8

smoking irritates and causes inflammation and scaring in the epithelium tissues of lungs.

alveoli walls become thicker due to scaring and produce more mucus. damage to airsacs causes emphysema and lungs lose natural elasticity

Question 9

what symptoms occur when squamous epithelial tissues become damaged?

Answer 9

breathlessness
persistent cough
phelgm

Question 10

what are these symptoms associated with?

Answer 10

COPD- chronic obstructive pulmonary disorder