Context: Death from laughter is a rare form of death, usually resulting from cardiac arrest or asphyxiation, caused by a fit of laughter. Instances of death by laughter have been recorded from the times of ancient Greece to the modern day.
 Question: can you have a heart attack from laughing Context: The main function of the blood--brain barrier is to protect the brain and keep it isolated from harmful toxins that are potentially in the blood stream. It accomplishes this because of its structure, as is usual in the body that structure defines its function. The tight junctions between the endothelial cells prevent large molecules as well as many ions from passing between the junction spaces. This forces molecules to go through the endothelial cells in order to enter the brain tissue, meaning that they must pass through the cell membranes of the endothelial cells. Because of this, the only molecules that are easily able to transverse the blood--brain barrier are ones that are very lipid-soluble. These are not the only molecules that can transverse the blood--brain barrier; glucose, oxygen and carbon dioxide are not lipid-soluble but are actively transported across the barrier, to support normal cellular function of the brain. The fact that molecules have to fully transverse the endothelial cells makes them a perfect barricade to unspecified particles from entering the brain, working to protect the brain at all costs. Also, because most molecules are transported across the barrier, it does a very effective job of maintaining homeostasis for the most vital organ of the human body.
 Question: can lipid soluble drugs cross blood brain barrier Context: The man is passed by two container ships, which do not see him, despite his use of signaling flares. He drifts out of the shipping lane with no food or water. On the eighth day, he writes a letter, puts it in a jar, and throws it in the ocean as a message in a bottle. Later that night, he sees a light in the distance. He tears pages from his journal along with charts to create a signal fire. The fire grows out of control and consumes his raft. He falls into the water and allows himself to sink. Underwater, he sees the hull of a boat with a search light approaching his burning raft. He swims towards the surface to grasp an outstretched hand.
 Question: does he live or die in all is lost Context: Status as a natural-born citizen of the United States is one of the eligibility requirements established in the United States Constitution for holding the office of President or Vice President. This requirement was intended to protect the nation from foreign influence.
 Question: does vice president have to be born in us Context: South Carolina was the first state to secede from the Union (Dec. 1860), and was one of the founder members of the Confederacy (Feb. 1861). The bombardment of the beleaguered U.S. garrison at Fort Sumter in Charleston Harbor on April 12, 1861 is normally reckoned as the first military engagement of the war.
 Question: was south carolina the first state to secede from the union
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Yes