A child is growing at a rate appropriate for their age. What cells are responsible for the secretion of bone matrix that eventually results in bone growth?

Lamellae.

Osteoblasts.

Osteocytes.

Osteoclasts.

Answer and Explanation

The Correct Answer is B

Choice A rationale

Lamellae are layers of bone tissue arranged in concentric circles in compact bone, not cells responsible for bone matrix secretion.

Choice B rationale

Osteoblasts are the cells responsible for the secretion of bone matrix. They produce collagen and other substances necessary for bone formation and growth.

Choice C rationale

Osteocytes are mature bone cells derived from osteoblasts. They maintain bone tissue but do not secrete bone matrix.

Choice D rationale

Osteoclasts are cells involved in the resorption of bone tissue, not the secretion of bone matrix. They break down bone tissue during growth and repair.

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Correct Answer is B

Explanation

Choice A rationale

Lordosis is an exaggerated inward curvature of the lumbar spine. It is commonly seen in pregnant women, individuals with obesity, or those with weak abdominal muscles. Lordosis is not characterized by an increased thoracic curvature.

Choice B rationale

Kyphosis is an exaggerated outward curvature of the thoracic spine, often resulting in a hunched or rounded back. It is commonly seen in older adults due to osteoporosis, degenerative disc disease, or poor posture. Kyphosis is the correct diagnosis for increased thoracic curvature.

Choice C rationale

Scoliosis is a lateral curvature of the spine, often resembling an "S" or "C" shape when viewed from behind. It can occur in any part of the spine but does not specifically describe an increased thoracic curvature.

Choice D rationale

Epiphyses refer to the growth plates at the ends of long bones in children and adolescents. They are not related to spinal curvature or any spinal disorder. .

A. Dura mater. B. Meninges. C. Pia mater. D. Arachnoid mater.

Correct Answer is B

Explanation

Choice A rationale

The dura mater is the outermost, tough, and fibrous layer of the meninges that provides protection to the brain and spinal cord.

Choice B rationale

Meninges collectively refer to the three layers of protective membranes (dura mater, arachnoid mater, and pia mater) that cover the brain and spinal cord.

Choice C rationale

The pia mater is the delicate innermost layer of the meninges that closely envelopes the brain and spinal cord, providing support and nourishment.

Choice D rationale

The arachnoid mater is the middle layer of the meninges that has a web-like appearance and provides cushioning for the brain and spinal cord.

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A child is growing at a rate appropriate for their age. What cells are responsible for the secretion of bone matrix that eventually results in bone growth?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

An older adult client has come to the clinic for a regular check-up. The nurse's initial inspection reveals an increased thoracic curvature of the client's spine. The nurse should document the spinal disorder as which of the following?

Correct Answer is B

Explanation

Which term describes the fibrous connective tissues that cover the brain and spinal cord?

Correct Answer is B

Explanation

What is the function of cerebrospinal fluid (CSF)?

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