Which is the most likely explanation for the defect in dystrophic epidermolysis bullosa, in which the skin blisters in response to any touch?
A. Melanocytes cannot produce melanin.
B. The skin layers are reversed.
C. Collagen fibrils that attach the epidermis to the dermis break down.
D. The skin has too many melanocytes that produce too much melanin.
Answer: C
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A bruise appears as a greenish spot in the skin because
A) hemoglobin has leaked from the blood into the injury and hemoglobin has a green color. B) the heme group in the hemoglobin has broken down into biliverdin. C) bilirubin from iron recycling has built-up in the bruise. D) red blood cells lyse releasing biliverdin from inside. E) dead white blood cells accumulate at the site of injury.
What vitamin does parathyroid hormone enhance activation of in the kidneys?
a. vitamin A b. vitamin B6 c. vitamin C d. vitamin D e. vitamin E
Which of the following ligaments is Y-shaped and strengthens the anterior aspect of the hip joint?
A) pubofemoral B) ischiofemoral C) iliofemoral D) acetabular labrum
There are fewer T cells as we age because the thyroid gland decreases in size.
Answer the following statement true (T) or false (F)