Question at position 19 What is the cerebral cortex?The entire brain and the spinal cordThe outer surface of the brainThe entire brainThe interior of the brain

Question

BlackTom AI · Accepted Answer

First, consider the overall structure of the brain and its protective covering to identify what the term cerebral cortex refers to.
Option 1: 'The entire brain and the spinal cord' is incorrect because the brain and spinal cord together are the central nervous system; the cerebral cortex is a specific part of the brain, not the entire CNS including the spinal cord.
Option 2: 'The outer surface of the brain' describes the cerebral cortex precisely, since the cortex is the folded, outer layer of neural tissue covering the cerebrum and is responsible for many higher-order brain functions.
Option 3: 'The entire brain' would imply all brain components, including subcortical structures like the thalamus, hypothalamus, basal ganglia, and brainstem; the cortex is only the outer layer, not the full brain.
Option 4: 'The interior of the brain' would refer to the internal regions deep inside the brain, such as ventricles and subcortical nuclei; this does not match the cortex, which is the exterior surface.
To deepen understanding, recall that the term cortex is used in several contexts (cerebral cortex, olfactory cortex, etc.) to denote the outer sheet of neural tissue covering a brain region, with the cerebral cortex being the most prominent example in humans.
In light of these distinctions, options that describe the entire brain, its interior, or the CNS as a whole mischaracterize the cortex, while identifying the cortex as the outer surface aligns with standard neuroanatomy concepts.

Question at position 19 What is the cerebral cortex?The entire brain and the spinal cordThe outer surface of the brainThe entire brainThe interior of the brain单项选择题

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