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Georgia [21]
3 years ago
10

Cystic fibrosis is an inherited respiratory disorder in which the mucociliary escalator no longer functions because of the prese

nce of excessively dense and viscous mucus. Which of the following components of the respiratory system are affected by cystic fibrosis?
A. oblet cells
B. cilia
C. lungs
D. All of the listed responses are correct.
Biology
1 answer:
lakkis [162]3 years ago
8 0

Answer:

C. lungs

Explanation:

Cystic fibrosis is a genetic disease caused by the mutation in the CF gene located on chromosome 7 which codes for the CFTR protein.

Cystic fibrosis transmembrane regulator protein or CFTR encoded protein regulates the movement of the water and chloride and sodium ions in and out of the cell.

The mutated gene forms abnormal protein which disrupts the movement of the ions and water in and out of the cell.

As a result of thick, the person develops thick and sticky mucus in the respiratory organs, especially in the lungs. Other organs of the body are also affected.

Thus, the lungs are the correct answer.

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Explanation:

Darwin's finches are a classical example of an adaptive radiation

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  • Changes in size and form of the beak have enabled different species to utilize different food resources such us insects, seeds, nectar from cactus flowers all driven by Darwinian selection
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  • At each of the stop, Darwin had the opportunity to study the local plants and animals
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  • According to Darwin's idea, this pattern would make sense if the Galapagos Islands had long ago been populated by birds from the neighboring mainland
  • On each island, the finches might have gradually adapted to local conditions (over many generations and long periods of time)
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  • Darwin developed and refined a set of ideas that could explain the patterns he had observed during his voyage
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DNA, Genes and Chromosomes — University of Leicester

www2.le.ac.uk/projects/vgec/highereducation/topics/dna-genes-chromosomes

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