In the development of the nervous system, which is

Question 1 of 5

In the development of the nervous system, which is the correct order of events?

A. First, cells must be specified to be neurons, second, these neurons must make connections with their targets, third, the neurons must migrate to their final position, and fourth, the neurons refine their synaptic connections. B. First, cells must be specified to be neurons, second, the neurons must migrate to their final position, third, these neurons must make connections with their targets, and fourth, the neurons refine their synaptic connections. C. First, cells must migrate to their final position, second, these cells must be specified to be neurons, third, the neurons must make connections with their targets, and fourth, the neurons refine their synaptic connections. D. First, the prospective neurons must make connections with their targets, second, the neurons refine their synaptic connections, third, the neurons must migrate to their final position, and fourth, the cells are specified to become neurons.

Correct Answer: B

Rationale: The correct sequence of nervous system development involves: (1) specification of cells as neurons, (2) migration of neurons to their final positions, (3) formation of connections with targets, and (4) refinement of synaptic connections. This order ensures proper neural circuit formation and function. Specification occurs first, followed by migration, which positions neurons correctly. Axon outgrowth and target connection occur next, and finally, synaptic pruning and refinement optimize neural communication.

Question 2 of 5

The nurse is caring for a client with ICP. Why will the nurse position the client in bed with HOB elevated to 30 degrees?

A. Makes it easier for the client to breathe B. Prevents the Valsalva maneuver C. Promotes venous drainage D. Reduces pain

Correct Answer: C

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

Question 3 of 5

The nurse notes that a patient is not able to voluntarily move the right arm. Which part of the brain should the nurse suspect is affected in this patient?

A. Cerebellum B. Frontal lobe C. Parietal lobe D. Hypothalamus

Correct Answer: B

Rationale: The frontal lobes contain the motor areas that generate the impulses that bring about voluntary movement. Each motor area controls movement on the opposite side of the body. The cerebellum is responsible for coordination and balance, while the parietal lobe processes sensory information. The hypothalamus regulates autonomic functions and is not directly involved in voluntary movement.

Question 4 of 5

The nurse is caring for a patient diagnosed with a cerebral tumor. For which function should the nurse expect to assess an abnormality?

A. Reflex movement B. Movement and speech C. Coordination and posture D. Heart rate and respiratory rate

Correct Answer: B

Rationale: A cerebral tumor in the frontal lobe may affect movement and speech, as this area contains the motor cortex and Broca's area. Reflex movements are controlled by the spinal cord, coordination by the cerebellum, and heart rate by the medulla. Assessing movement and speech is critical for localizing the tumor's effects.

Question 5 of 5

The nurse is providing care for an 87-year-old woman who is recovering from a cerebral vascular accident. Which precaution should the nurse take after noting the patient has a positive Romberg test?

A. Institute fall-risk precautions. B. Provide small, frequent meals. C. Request a footboard and splints. D. Darken the room and reduce stimuli.

Correct Answer: A

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

In the development of the nervous system, which is the correct order of events?

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