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Ch. 6 Bones and Bone Structure
Martini - Fundamentals of Anatomy & Physiology 11th Edition
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
All textbooksMartini, Nath, Bartholomew 11th EditionCh. 6 Bones and Bone StructureProblem 29b
Chapter 6, Problem 29b

Exposure to optimum amounts of sunlight is necessary for proper bone maintenance and growth in children.
(b) If a child lives in an area where exposure to sunlight is rare because of pollution or overcast skies, what can be done to minimize impaired maintenance and growth of bone?

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Understand the role of sunlight in bone maintenance and growth: Sunlight is essential for the synthesis of vitamin D in the skin. Vitamin D helps regulate calcium and phosphate levels in the blood, which are critical for bone mineralization and overall bone health.
Identify alternative sources of vitamin D: In areas with limited sunlight exposure, dietary sources of vitamin D become important. Foods such as fatty fish (e.g., salmon, mackerel), fortified milk, and egg yolks can help provide vitamin D.
Consider vitamin D supplementation: If dietary intake is insufficient, vitamin D supplements can be recommended to ensure adequate levels. Consult a healthcare provider to determine the appropriate dosage based on the child's age and needs.
Promote calcium-rich foods: Calcium is a key mineral for bone health. Encourage the consumption of calcium-rich foods such as dairy products, leafy green vegetables, and fortified cereals to support bone growth and maintenance.
Encourage regular physical activity: Weight-bearing exercises, such as walking, running, or jumping, stimulate bone remodeling and strengthen bones. Ensure the child engages in age-appropriate physical activities to support bone health.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Vitamin D Synthesis

Vitamin D is crucial for calcium absorption and bone health, and it is synthesized in the skin through exposure to sunlight. When sunlight is limited, children may not produce enough Vitamin D, leading to potential bone growth issues. Supplementation or dietary sources of Vitamin D can help mitigate this deficiency.

Calcium Intake

Calcium is a vital mineral for bone development and maintenance. In areas with limited sunlight, ensuring adequate dietary calcium intake becomes essential. Foods rich in calcium, such as dairy products, leafy greens, and fortified foods, can support bone health in children who may not receive enough sunlight.
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Physical Activity

Regular physical activity, especially weight-bearing exercises, is important for stimulating bone growth and maintenance in children. Engaging in activities like running, jumping, or playing sports can enhance bone density and strength, compensating for the lack of sunlight exposure and promoting overall skeletal health.
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Textbook Question

Frank does not enter puberty until he is 16. What effect would you predict this will have on his stature?

(a) Frank will probably be taller than if he had started puberty earlier.

(b) Frank will probably be shorter than if he had started puberty earlier.

(c) Frank will probably be a dwarf.

(d) Frank will have bones that are heavier than normal.

e) The late onset of puberty will have no effect on Frank's stature.

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Textbook Question

While playing on her swing set, 10-year-old Sally falls and breaks her right leg. At the emergency room, the doctor tells her parents that the proximal end of the tibia where the epiphysis meets the diaphysis is fractured. The fracture is properly set and eventually heals. During a routine physical when she is 18, Sally learns that her right leg is 2 cm shorter than her left, probably because of her accident. What might account for this difference?

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Textbook Question

In physical anthropology, cultural conclusions can be inferred from a thorough examination of the skeletons of ancient peoples. What sorts of clues might bones provide as to the lifestyles of those individuals?

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Textbook Question

Which of the following conditions would you possibly observe in a child who is suffering from rickets?

(a) Abnormally short limbs

(b) Abnormally long limbs

(c) Oversized facial bones

(d) Bowed legs

(e) Weak, brittle bones

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