Within what approximate time frame does necrosis (cell death) occur because of lack of blood, oxygen, and glucose supplied to the brain?

Correct Answer: D

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

Correct Answer: C

Rationale: The number 13 corresponds to the renal pelvis because it is the funnel-shaped structure in the kidney that collects urine from the nephrons and channels it into the ureter. The renal pelvis is a critical part of the urinary system, as it serves as a reservoir for urine before it is excreted from the body.

Correct Answer: B

Rationale: Posterior horns of the spinal cord are the correct answer because they are involved in processing sensory information, including pain and temperature. Damage to this area disrupts the transmission of these sensory signals, leading to a loss of temperature and pinprick sensation while preserving other sensory modalities.

Correct Answer: A

Rationale: Frontal lobe is the correct answer because Broca's area, which is responsible for speech production and language processing, is located in the posterior part of the frontal lobe, typically in the left hemisphere. Damage to this area results in Broca's aphasia, characterized by non-fluent speech and difficulty forming sentences.

Correct Answer: C

Rationale: Tremor is the correct answer because it is one of the earliest and most characteristic symptoms of Parkinson's disease. The tremor is typically a resting tremor, which decreases with voluntary movement and is often described as ‘pill-rolling' due to its appearance. It results from the degeneration of dopaminergic neurons in the substantia nigra.