Which of the following is due to the inability to produce collagen or producing a defective collagen?
osteoporosis
osteogenesis imperfecta
osteomalacia
osteoarthritis
osteopetrosis
The Correct Answer is B
A. osteoporosis
This is a condition of reduced bone mass, often due to calcium/Vitamin D deficiency or hormonal imbalance-not defective collagen.
B. osteogenesis imperfecta
Known as “brittle bone disease”, osteogenesis imperfecta is a genetic disorder caused by defective or insufficient type I collagen, leading to fragile bones.
C. osteomalacia
Caused by Vitamin D deficiency, leading to soft bones due to defective mineralization, not collagen defects.
D. osteoarthritis
Degeneration of articular cartilage due to aging or wear-and-tear, not a collagen production issue.
E. osteopetrosis
A bone resorption disorder due to defective osteoclasts, resulting in abnormally dense but brittle bones-not due to collagen abnormalities.
F. fibrodysplasia ossificans progressiva
A rare genetic disorder in which soft tissue gradually turns into bone, unrelated to collagen production.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. apocrine: Apocrine glands release part of their cytoplasm with the secretion, which can include membrane-bound substances like phospholipids.
B. merocrine: Merocrine glands secrete products via exocytosis without releasing any cytoplasm or membrane material. Their secretions do not contain phospholipids.
C. sebaceous: Sebaceous glands are holocrine glands that release the entire cell contents, including membrane lipids such as phospholipids.
D. holocrine: These glands release whole cells that disintegrate, leading to secretions rich in lipids, including phospholipids.
Correct Answer is A
Explanation
A. squamous cell carcinoma
This cancer arises from the keratinocytes of the stratum spinosum, often due to UV damage, and can metastasize if not treated early.
B. melanoma
Melanoma arises from melanocytes, which are found in the stratum basale, not the stratum spinosum.
C. basal cell carcinoma
This cancer originates from basal cells of the stratum basale, the deepest layer of the epidermis.
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