3 - Cystic Fibrosis Flashcards
What type of cells are affected by cystic fibrosis?
Epithelial
Cystic fibrosis affects the movement of which ions?
Cl-
Why are epithelial cells able to move materials into one side and out the other?
They are polarized
What are the 4 main organs affected by cystic fibrosis?
- Lungs
- Pancreas
- Sweat glands
- Male reproductive tract
What proportion of Caucasians are carriers for cystic fibrosis?
1 in 25
What proportion of Caucasians are diagnosed with cystic fibrosis?
1 in 2500
Cystic fibrosis is the result of a mutation on which chromosome?
7
In cystic fibrosis, an amino acid is deleted from which gene?
CFTR gene
How does the mucociliary escalator protect against infection?
Cilia beat pathogen-trapping mucus into the oropharynx where it can be swallowed
Why is someone with cystic fibrosis more likely to suffer repeated lung infections?
Thickened mucus traps pathogens
Pancreatic lipase aids in ___ absorption.
Fat
Why does cystic fibrosis lead to poor fat absorption?
Thickened mucus blocks pancreatic lipase from reaching the small intestine
What is steatorrhea?
Fatty stools
How does cystic fibrosis lead to salty sweat?
Due to a dysfunctional CFTR channel, Cl- (and thus Na+) is not reabsorbed by the sweat glands
How does cystic fibrosis lead to an early death?
Recurrent lung infections damage the airways
What is the current life expectancy for cystic fibrosis?
40 years