1.Is cystic fibrosis a beneficial or harmful mutation? Explain.
2. What are some of the symptoms of cystic fibrosis?
3.How does a person get cystic fibrosis? How are their cells different from that of a person without cystic fibrosis?
4.How has treatment improved for cystic fibrosis patients over the years?

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1.  harmful mutation because Cystic Fibrosis (CF), also known as a hereditary disease that affects several organs of the body, mainly the pancreas and the lungs.

2.Persistent breathing difficulty. Breathing difficulty on exertion. Wheezing. Sinusitis. Abdominal pains.

3.Cystic fibrosis is a genetic disorder caused by mutation (change) in the cystic fibrosis transmembrane conductance (CFTR) gene. the CFTR protein serves as a gate at the cell surface, which opens to allow chloride ions to cross the cell membrane.

4.Creon has come a long way in recent years; the important enzyme is necessary to help those with CF absorb nutrients from their food but it hasn’t always been available in the capsule form it is today. Many older people with CF will remember having to sprinkle Creon powder directly onto their food, which both tasted and smelled terrible. The first Creon capsules led to many people experiencing painful burning as it went down the esophagus. Over the years, it’s been refined so that fewer capsules are needed and an improved coating ensures that it stays intact until it reaches the stomach.

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the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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