What are the effects of cystic fibrosis?
options:
A) circulatory and cardiovascular diseases
B) respiratory and digestive issues
C) absence of pigment
D) skin disorders
The correct answer is:
B) respiratory and digestive issues
Cystic fibrosis primarily affects the respiratory and digestive systems. It leads to the production of thick and sticky mucus in the lungs, causing persistent coughing, shortness of breath, and recurring lung infections. This can eventually result in lung damage and respiratory failure.
In the digestive system, cystic fibrosis affects the pancreas, which impairs the production and secretion of enzymes needed for the digestion of food. This can lead to malnutrition, poor weight gain, and difficulty absorbing nutrients from food. It can also cause fatty stools, frequent bowel movements, and an increased risk of developing bowel obstructions.
Circulatory and cardiovascular diseases, absence of pigment, and skin disorders are not direct effects of cystic fibrosis.
The effects of cystic fibrosis are predominantly respiratory and digestive issues, so option B is the correct answer.
Cystic fibrosis is a genetic disorder that affects certain glands in the body, particularly those that produce mucus and sweat. This condition causes the mucus to become thicker and stickier than normal, clogging the airways and obstructing the pancreatic ducts, leading to respiratory and digestive problems.
To get the answer, you could have knowledge of cystic fibrosis and its associated symptoms and effects. Alternatively, you could have conducted research on this topic using reliable sources such as medical textbooks, scholarly articles, or reputable health websites.
Which statement is the most accurate definition of mutation?
A) A mutation is a change in DNA that only causes survival advantages.
B) A mutation is a change in DNA that can change the structure of genetic information and cause diseases.
C) A mutation is a change in DNA that only causes diseases.
D) A mutation is a change in DNA that can change the structure and function of genetic information.
The most accurate definition of mutation is:
B) A mutation is a change in DNA that can change the structure of genetic information and cause diseases.
Mutations can result from changes in DNA sequences, such as the substitution, deletion, or insertion of nucleotides. These changes can alter the structure and function of genetic information, potentially leading to the development of diseases. However, it is important to note that not all mutations are harmful or result in diseases. Some mutations can have neutral or even beneficial effects.
What is the main function of camouflage?
Camouflage helps organisms gain nutrients in their environment.
Camouflage helps organisms find mates.
Camouflage helps organisms blend within their environment.
Camouflage helps organisms resist diseases.
The main function of camouflage is:
C) Camouflage helps organisms blend within their environment.
Camouflage is a survival strategy used by organisms to blend in with their surroundings, making them less visible or indistinguishable from their environment. This helps them avoid predators, remain hidden from prey, and increase their chances of survival. By blending into their surroundings, organisms can better hunt for food, escape predators, or ambush prey without being noticed. Camouflage does not directly aid in nutrient acquisition, mate finding, or disease resistance.
A mutation that causes abnormal cell division can result in
skin cancer.
clogged arteries.
sickle cell anemia.
cystic fibrosis.
A mutation that causes abnormal cell division can result in:
A) Skin cancer.
Abnormal cell division can lead to the uncontrolled growth and proliferation of cells, which is a characteristic of cancer. Skin cancer is a type of cancer that can be caused by mutations in genes involved in cell division and growth, such as those affected by ultraviolet radiation. This uncontrolled division and growth of skin cells can lead to the formation of tumors and the development of skin cancer.
Clogged arteries, sickle cell anemia, and cystic fibrosis are not directly caused by mutations that result in abnormal cell division. Clogged arteries (atherosclerosis) can result from the buildup of plaque in arteries due to factors like cholesterol and inflammation. Sickle cell anemia is a genetic disorder caused by a mutation in the gene that controls hemoglobin production, resulting in abnormal red blood cells. Cystic fibrosis is also a genetic disorder caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, causing a malfunction in the chloride ion channels and leading to thick, sticky mucus in various organs.