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: In the early development of many organisms, the action potential is actually initially carried by calcium current rather than sodium current. The opening and closing kinetics of calcium channels during development are slower than those of the voltage-gated sodium channels that will carry the action potential in the mature neurons. The longer opening times for the calcium channels can lead to action potentials that are considerably slower than those of mature neurons. Xenopus neurons initially have action potentials that take 60--90 ms. During development, this time decreases to 1 ms. There are two reasons for this drastic decrease. First, the inward current becomes primarily carried by sodium channels. Second, the delayed rectifier, a potassium channel current, increases to 3.5 times its initial strength.
 Question: do all neurons have the same action potential Context: The 11-87 incorporates a self-compensating gas system design, which allows the gun to operate with every type of load, from light 2 3⁄4'' to 3'' Magnum shells without any shooter adjustments. It is manufactured in two different gauges: 20 and 12, and both will cycle 2 3⁄4'' and 3'' shells.
 Question: can my remington 1100 shoot 3 inch shells Context: Excluding limited exemptions for religious accommodation, the United States Army, Air Force, and Marine Corps have policies that prohibit beards on the basis of hygiene and the necessity of a good seal for chemical weapon protective masks. The official position is that uniform personal appearance and grooming contribute to discipline and a sense of camaraderie.
 Question: are you allowed to have a beard in the air force Context: Upper respiratory tract infections (URTI) are illnesses caused by an acute infection which involves the upper respiratory tract including the nose, sinuses, pharynx or larynx. This commonly includes nasal obstruction, sore throat, tonsillitis, pharyngitis, laryngitis, sinusitis, otitis media, and the common cold. Most infections are viral in nature and in other instances the cause is bacterial. Upper respiratory tract infections can also be fungal or helminth in origin, but these are far less common.
 Question: is pharyngitis a symptom of upper respiratory infection Context: The Toyota RAV4 (Japanese: トヨタ RAV4 (ラヴフォー), Toyota Ravufō) is a compact crossover SUV (sport utility vehicle) produced by the Japanese automobile manufacturer Toyota. This was the first compact crossover SUV; it made its debut in Japan and Europe in 1994, and in North America in 1995. The vehicle was designed for consumers wanting a vehicle that had most of the benefits of SUVs, such as increased cargo room, higher visibility, and the option of full-time four-wheel drive, along with the maneuverability and fuel economy of a compact car. Although not all RAV4s are four-wheel-drive, RAV4 stands for ``Recreational Activity Vehicle: 4-wheel drive'', because the aforementioned equipment is an option in select countries.
 Question: does the toyota rav4 have all wheel drive
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Yes