One of the three basic parts of a neuron is the ________.

Correct Answer: A

Rationale: A neuron consists of three basic parts: the cell body, dendrites, and axon. The axon is a long, slender projection that transmits nerve impulses away from the cell body to other neurons or target cells. Myelin is a protective sheath around some axons, the pons is a part of the brainstem, and the dura mater is a meningeal layer. Therefore, axon is the correct answer as it is one of the fundamental components of a neuron.

Correct Answer: A

Rationale: The sympathetic nervous system prepares the body for 'fight-or-flight' responses during threatening situations by increasing heart rate, dilating pupils, and redirecting blood flow. The parasympathetic nervous system has the opposite effect, while the cerebrum, somatic nervous system, and afferent nervous system are not primarily responsible for this response. Thus, A is the correct answer.

Correct Answer: B

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

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.

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.