You meet the love of your life, but you are concerned that his teeth are falling out, and he tells you he has very brittle bones. What might you suggest he begin supplementing his diet with?
vitamin A
vitamin D
vitamin C
vitamin E
The Correct Answer is B
A. vitamin A
Vitamin A plays a role in bone remodeling, but excess vitamin A can cause bone fragility. It’s not the first recommendation in cases of brittle bones.
B. vitamin D
Vitamin D helps the body absorb calcium from the digestive tract. A deficiency can lead to osteomalacia (soft bones) or osteoporosis (brittle bones), and also contributes to tooth decay.
C. vitamin C
Vitamin C is needed for collagen synthesis, which is important in bone matrix formation, but deficiency leads to scurvy, not typically brittle bones and teeth loss in this context.
D. vitamin E
Vitamin E is an antioxidant but does not have a primary role in bone or dental health.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. collagen
Collagen provides tensile strength and structural support in connective tissues but is not water-resistant or as hard as keratin.
B. elastic
Elastic fibers allow tissues to stretch and recoil. They are not hard or water-resistant.
C. hyaluronic acid fibrin
Hyaluronic acid is a glycosaminoglycan important for hydration in connective tissue; fibrin is a clotting protein. Neither is a hard, water-resistant structural protein.
D. keratin
Keratin is a fibrous protein found in skin, hair, and nails. It provides a tough, water-resistant barrier on the outer skin (especially in the stratum corneum).
Correct Answer is C
Explanation
A. an inability to lay down new bone
Bone formation is the role of osteoblasts, not osteoclasts.
B. an inability to lay down cartilage
Cartilage is formed by chondroblasts, unrelated to osteoclasts.
C. an inability to regulate calcium
Osteoclasts resorb bone, releasing calcium into the bloodstream. Defective osteoclasts impair this process, disrupting calcium homeostasis.
D. an inability to create matrix
Osteoclasts break down bone matrix, they don’t create it. Matrix creation is done by osteoblasts.
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