After the law firm retreat, attorney George is exiled to live in the most northern region of Greenland where he never gets any sunlight. What might be a result with regard to his skeletal system?
he could develop brittle bones
he could develop very dense bones
he could develop soft, bowed bones
he could develop nightmares
The Correct Answer is C
A. he could develop brittle bones
Brittle bones are more associated with osteoporosis or osteogenesis imperfecta, not primarily from vitamin D deficiency due to lack of sunlight.
B. he could develop very dense bones
Dense bones are seen in conditions like osteopetrosis, which results from defective osteoclast activity-not lack of sunlight.
C. he could develop soft, bowed bones
Lack of sunlight leads to vitamin D deficiency, impairing calcium absorption, which causes rickets in children and osteomalacia in adults, both of which involve soft, weakened bones that may bow under body weight.
D. he could develop nightmares
While isolation might impact mental health, this has no direct link to skeletal effects or bone physiology.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. it is composed of osteons
Compact bone is made up of osteons (Haversian systems), each with a central canal and concentric lamellae.
B. it contains concentric and circumferential lamellae
Concentric lamellae are within osteons; circumferential lamellae line the outer and inner surfaces of compact bone.
C. it has very little air space compared to cancellous
Compact bone is dense with few spaces, unlike spongy (cancellous) bone, which has many air spaces.
D. the matrix is composed of trabeculae
Trabeculae are found in spongy (cancellous) bone, not compact bone. Compact bone has a solid matrix organized into osteons, not trabecular structures.
Correct Answer is A
Explanation
A. tightly packed cells: Epithelial tissue consists of cells that are closely packed together with minimal extracellular space, forming continuous sheets that cover surfaces or line cavities. This allows for effective protection, absorption, and secretion.
B. extensive extracellular matrix: This is characteristic of connective tissue, not epithelial tissue. Epithelial tissue has very little extracellular matrix.
C. a rich blood supply: Epithelial tissues are avascular, meaning they lack a direct blood supply. They receive nutrients via diffusion from underlying connective tissue.
D. presence of lacunae: Lacunae are small spaces that contain cells in cartilage or bone tissue, not epithelial tissue.
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