Final answer:
The signs and symptoms of a transient ischemic attack (TIA) may last up to 24 hours, as it is a temporary interruption in blood flow to the brain that does not cause permanent damage.
Step-by-step explanation:
The signs and symptoms of a transient ischemic attack (TIA) may last up to 24 hours. A TIA, often referred to as a mini-stroke, is a temporary loss of neurological function caused by a brief interruption in blood flow to the brain. The symptoms usually resolve within 24 hours due to restoration of adequate blood flow. If the symptoms resolve in an hour or two, it is still classified as a TIA. This event does not cause permanent damage to the brain cells, unlike a full stroke where effects last longer than 24 hours and can be permanent.