BIOL140 Xavier Nursing answers

BIOL140 Xavier nursing answers

1. Explain why tissues can be so different even though they have the same DNA.
2. Consider columnar and cuboidal epithelial tissue. Describe their physical and functional characteristics. What do you think would happen if the columnar lost its microvilli? What do you think would happen if in the digestive system the tissue changed to cuboidal? What if you lost your basement membrane?
3. What is extracellular matrix? In which tissue does it help differentiate between the types? There are a number of diseases linked to abnormalities in the extracellular matrix. One is scurvy, where a diet low in Vitamin C results in abnormal collagen production. Which types of connective tissue would you expect to be most affected and why (you can compare/contrast short and long term effects if desired).
4. Explain the severity of skin cancer based on the different types of cells they can come from (hint: think of the key characteristics of the cells, including location, amount of division and link to metastasis).
5. We constantly explore different ways of delivering drugs through the skin. One method is the patch. What layer of skin is the hardest for the drug to penetrate? What is the name of the protein that gives skin its ability to resist penetration? Could all drugs be delivered via a patch? Consider the different classes of biological molecules (i.e. proteins, lipids, carbohydrates and nucleic acids). Which are the best candidates for delivery via patch and why?
6. Some tissues require making a great deal of extracellular proteins, while others need intracellular proteins. Given an example for each type (be as specific as possible and list an example of the protein made). What organelles are required for extracellular proteins, and what is required for intracellular proteins? BIOL140 Xavier nursing answers

Graded portion ends here.

• Why isn’t squamous tissue found lining ducts or glands? Why instead do you find it in the respiratory tract?
• Why is cartilage slow to heal? What would be a tissue you would expect to heal quickly?  Why?
• In albinism, you don’t make melanin. What does melanin, and what problems can arise from its lack?
• Burn victims suffer immense pain, dehydration, problems controlling body temperature, and high risk of infection. Explain which part of the skin contributes to these core body functions.
• Describe the changes to skin in aging. If you were to develop your own anti-aging formula, what would it be?
• Explain how the shape and composition of a tissue’s cells contribute to its function (for example, compare columnar versus epithelial..hint think surface area).
• What would happen if you lost the microvilli in your digestive epithelia? BIOL140 Xavier nursing answers

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