The substance that is released at axonal endings to propagate a nervous impulse is called:

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Neurological System NCLEX Questions Questions

Question 1 of 5

The substance that is released at axonal endings to propagate a nervous impulse is called:

Correct Answer: C

Rationale: Neurotransmitters are chemical substances released at axonal endings to propagate nervous impulses across synapses. Ions and the sodium-potassium pump are involved in generating action potentials, while nerve glue and action potentials are not substances released at axonal endings. Thus, C is the correct answer.

Question 2 of 5

Use of the Glasgow Coma Scale (GCS) provides relatively objective measurement of the Level of Consciousness (LOC). The three functions assessed are:

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

The ventricular proliferative zone is:

Correct Answer: D

Rationale: The ventricular proliferative zone is a region of active cell division located in the neural tube. It gives rise to neurons and glial cells during nervous system development. This zone is essential for generating the vast number of cells required to form the complex structure of the brain and spinal cord.

Question 4 of 5

Which of the following signs and symptoms of increased ICP after head trauma would appear first?

Correct Answer: C

Rationale: Restlessness and confusion are often the earliest signs of increased ICP. These symptoms occur due to impaired cerebral perfusion and hypoxia. As ICP rises, it compresses brain tissue and blood vessels, leading to altered mental status. Bradycardia, widened pulse pressure, and changes in urine output are later signs of increased ICP and indicate more severe neurological compromise.

Question 5 of 5

A nurse is assessing a client who has returned from a cerebral arteriogram. The left carotid site was punctured. Which of the following indicates complications?

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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