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 A

Explanation

Choice A rationale

The oculomotor nerve (cranial nerve III) is responsible for innervating the muscles that move the eye and lift the eyelid, as well as controlling pupil constriction and lens shape for focusing.

Choice B rationale

The vestibulocochlear nerve (cranial nerve VIII) is involved in hearing and balance, not in the movement of eye muscles or eyelids.

Choice C rationale

The facial nerve (cranial nerve VII) controls muscles of facial expression, taste sensations from the anterior two-thirds of the tongue, and functions in tear and saliva production.

Choice D rationale

The trigeminal nerve (cranial nerve V) is responsible for sensation in the face and motor functions such as biting and chewing, not for eye movements.

A. Low. B. Inaccurate. C. Within normal limits. D. High.

Correct Answer is A

Explanation

Choice A rationale

A cerebral perfusion pressure (CPP) of 40 mm Hg is considered low, as the normal range for CPP is typically between 60 and 80 mm Hg. Low CPP can lead to inadequate blood flow to the brain.

Choice B rationale

An accurate CPP reading is crucial for assessing intracranial pressure and cerebral blood flow. A reading of 40 mm Hg is not typically considered inaccurate.

Choice C rationale

A CPP of 40 mm Hg is not within normal limits, as it is significantly below the normal range.

Choice D rationale

A CPP of 40 mm Hg is not high; it is considered low and requires medical attention.

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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?

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Naxlex Comprehensive Predictor Exams

Which cranial nerve is responsible for muscles that move the eye and lids?

Correct Answer is A

Explanation

A client with increased intracranial pressure has a cerebral perfusion pressure (CPP) of 40 mm Hg. This CPP reading is considered:

Correct Answer is A

Explanation

A client is scheduled for a bone scan to rule out osteosarcoma of the pelvic bones. Which client status would be most important for the nurse to verify before the client's scan?

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?

A critical care nurse is caring for a client diagnosed with acute pancreatitis. The nurse knows this client should be started on parenteral nutrition (PN) after what indications?

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

The nurse documenting an acute open wound should include which characteristics? Select all that apply.

The nurse is assessing the pupils of a client who has had a head injury. What does the nurse recognize as a parasympathetic effect?

The nurse is caring for a client whose recent health history includes an altered LOC. What should be the nurse's first action when assessing this client?

A nurse's assessment of a teenage client reveals that their shoulders are not level and that they have one prominent scapula that is accentuated by bending forward. The nurse should expect to read about what health problem in the client's electronic health record?