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Multiple Choice
Which of the following statements is true about a stroke?
A
A stroke is caused by an overproduction of cerebrospinal fluid.
B
A stroke primarily affects the peripheral nervous system.
C
A stroke occurs when blood flow to a part of the brain is interrupted.
D
A stroke is a condition that only affects the heart.
Verified step by step guidance
1
Understand the definition of a stroke: A stroke occurs when the blood supply to part of the brain is interrupted or reduced, preventing brain tissue from getting oxygen and nutrients.
Recognize that cerebrospinal fluid (CSF) is not directly involved in causing strokes. CSF cushions the brain and spinal cord, but an overproduction of CSF is related to conditions like hydrocephalus, not strokes.
Differentiate between the central nervous system (CNS) and the peripheral nervous system (PNS). A stroke affects the CNS, specifically the brain, not the PNS.
Identify that a stroke is a neurological condition, not a cardiac condition. While the heart is involved in pumping blood, a stroke directly affects the brain due to interrupted blood flow.
Conclude that the correct statement is: 'A stroke occurs when blood flow to a part of the brain is interrupted.' This interruption can be due to a blocked artery (ischemic stroke) or a burst blood vessel (hemorrhagic stroke).