Upgrade to remove ads
Critical Thinking Questions Chapter 4
Terms in this set (9)
A nurse tells a doctor that a patient is a cyanotic. What is cyanosis? What does its presence indicate?
Cyanosis is when hemoglobin is poorly oxygenated and the blood and the skin turn blue in Caucasians. It common during heart failure and severe breathing disorders, and appears even in the mucous membranes and the nail beds. Its presence indicates the absence of oxygen!
Both newborn infants and aged individuals have very little hypodermis. How does this affect their sensitivity to cold environmental temperature?
The hypodermis is basically the deepest layer of the skin, and is all adipose tissue. Fat stores heat, and if a person is skinny or lacks hypodermis, they have a sensitivity and a tendency to get cold.
A 40 year old beachboy is complaining to you that his suntan made him popular when he was young - but now his face is all wrinkled, and he has several darkly pigmented moles that are growing rapidly and are as big as large coins. He shows you the moles, and immediately, you think ABCD. What does that mean, and why should he be concerned?
The ABCD rule is basically the factors that determine malignant melanoma: asymmetry, border, color, diameter, and sometimes elevation. This beachboy should be concerned because it sounds like he has melanoma. A key characteristic of melanoma is that it metastasizes quickly, and they are big moles.
Martha, the mother of a 13-year-old infant, brings her child to the clinic because his skin has turned orange. Why does the pediatrician inquire about the child's diet?
When a person has a yellow or orange tint, it usually is jaundice. Jaundice signifies liver problems. It could also be that the baby is eating too much carotene, which is a pigment that is found in carrots. If a person is eating too much carotene rich foods, their skin will turn orange!
The water of a swimming pool is hypotonic to our cells. Why do we not swell and pop when we go for a swim?
Our skin has an amazing quality of being selectively permeable, which means that our skin will only let certain substances into our body. Although our skin is selectively permeable, it does let some water into the skin, which makes it wrinkle up and prune. The epidermis is also composed of mostly dead cells, so they can't absorb water if they're dead. Our skin also is keratinized, which means that it is pretty much waterproof.
Mr. Bellazono, a fisherman in his late 60s, come to the clinic to complain of small ulcers on both forearms as well as on his face and ears. Although he has had them for several years, he has not had any other problems. What is the likely diagnosis, and what is the likely cause?
The most likely diagnosis is probably basal cell carcinoma. It appears as a shiny, dome-shaped nodule that is red, and the most common places for this cancer are the face, and is caused from many years in the sun, which is a daily part of his life as a fisherman. It also metastasizes slowly!
Mr. Grayson is receiving a drug treatment transdermally (through the skin). Explain why drugs delivered by this route are fat-soluble rather than water-soluble.
When a treatment is transdermal, it means it's absorbed through the skin, and it means that it doesn't have to be metabolized by any major organs. This treatment is also fat-soluble because it has to go through the adipose (fat) tissue.
Why does sunburned skin peel in sheets?
When skin peels as a result of sunburn damage, the deeper layers of the stratum corneum, which still maintain their desmosomal connections, detach. The desmosomes hold the cells together within the layers.
Which type of injection would allow a drug to be absorbed more rapidly - intradermal or subcutaneous (a shallow injection just deep to the epidermis)? Why?
Intradermal means inside the skin itself. Subcutaneous means below the skin. Intradermal injections are absorbed very slowly. Subcutaneous injections are also absorbed slowly as compared to intramuscular injections because of fats.
Different drugs are given according to its rapidity of action.
You might also like...
Anatomy Chapter 4:Skin and Membranes Review
Other sets by this creator
Critical Thinking Questions Chapter 4
Religion: Sacraments Test
AP Biology: Chapter 10