1. True
2. False

Although bile is produced by the liver, the gallbladder stores and secretes it when needed for digesting fatty foods in the duodenum of the small intestine.

1. True
2. False

A simplified explanation of vulcanization is heating rubber with sulfur. The process was discovered in 1839 by the U.S. inventor Charles Goodyear, who also used additional substances in the process.

1. True
2. False

Mercury is important scientifically, medically and in manufacturing. This heavy, silvery, metallic element is a liquid at room temperatures. Mercury exposure at high levels can harm the brain, heart, kidneys, lungs and immune system.

1. True
2. False

Hormones are the chemicals produced by the endocrine glands to control body functions. Tryptophan is needed for the body to produce serotonin, used to make melatonin, a hormone that helps to control your sleep and wake cycles.

1. True
2. False

Pellagra is characterized by the “four Ds” – dermatitis, diarrhea, dementia and death. It can be effectively cured with intravenous or oral niacin or nicotinamide.

1. True
2. False

Fluids comprised of white blood cells, cancer cells, pus, proteins or blood are called infiltrates. Pneumonia, silicosis, asbestosis and cystic fibrosis often cause the air sacs or alveoli within the lungs to fill with these fluids.

1. True
2. False

GIFT is a method of assisting reproduction in cases of infertility. It involves removing eggs from an ovary, commingling them with sperm, and inserting them into a fallopian tube by a laparoscope.

1. True
2. False

In cognitive science, forward search looks at applicability and in a backward search it's relevancy. More specifically, in search, we are trying to find a path from the start state to the goal state. In backward state we are finding a path from goal state to start state.

1. True
2. False

Hypovolemic shock is a condition involving loss of blood or bodily fluids. It is treatable by a medical professional. Depending on the severity, IV fluids and fluid replacements, as well as blood transfusions, may be needed.

1. True
2. False

Esotropia affects the eyes and gives an individual the appearance of having crossed eyes. The condition can be constantly present or occur intermittently.

1. True
2. False

The foot is formed by the bones of the metatarsals and phalanges.The metatarsal bones are a group of five long bones in the foot, whereas the phalanges are the bones of the toes.

1. True
2. False

Sialogogue is a drug that promotes the secretion of salivia. It stimulates any functioning salivary gland tissue to produce more saliva. This is important since saliva has a bactericidal effect. It can help prevent oral diseases and buffer acidity in the mouth.

1. True
2. False

It's a serious topic. And its premise has been innately accepted for centuries in such adages as "Laughter is the best medicine." Gelotology is the study of humor and laughter and its psychological and physiological effects on the human body.

1. True
2. False

Planning Domain Definition Language, or PDDL, is a guide to help standardize planning domain and problem description languages.

1. True
2. False

The Ibadan malimbe is a rare species of bird in the Ploceidae family. It is native to Nigeria, where it can be seen in the southwestern part of the country, including the city of Ibadan, which it's named after.

1. True
2. False

Omphalophobia is the irrational fear of the belly button. Symptoms of this phobia include: trembling, shaking, crying, curling up in a ball, running away and hiding, even having thoughts of death or dying.

1. True
2. False

Dizygotic (or dizygous) twins, also called fraternal twins or nonidentical twins, develop in the uterus separately. Dizygotic twins form when two separate sperm fertilize two separate eggs.

1. True
2. False

Myology is the medical specialty concerned with the study of the structure, function, diseases and disorders of muscles. This study is crucial, in that muscles are connected with the bones, cartilage, ligaments and skin, either directly or with tendons.

1. True
2. False

To most Artificial Intelligence (AI) researchers, the frame problem is the challenge of representing the effects of action in logic without having to represent explicitly a large number of intuitively obvious non-effects.

1. True
2. False

Xerosis is an excessive dryness of the skin. This condition is characterized by dryness and brittleness. Treatment is aimed at relieving the symptoms.

1. True
2. False

The parasitic insects, lice, are known for infesting the scalp and causing itching, visible lice on the scalp, and lice eggs (nits) on the hair shafts. It is very common - with more than six million U.S. cases per year.

1. True
2. False

People can be born with this abnormality, and often the heart has no other defects. Dextrocardia can also occur in a condition called situs inversus in which the position of all organs is reversed.

1. True
2. False

Amazonian electric eel actually can produce charges of 450 to 650 volts of electricity. The electric eel is one of the few animals on the planet that can make, store and discharge electricity.

1. True
2. False

The Antarctic is continuously being subjected to the world's largest ozone hole. It occurs because of the special atmospheric and chemical conditions that exist there and nowhere else.

1. True
2. False

One gallon of heating oil provides 138,500 BTUs, whereas a gallon of gas yields 115,000 BTUs and a pound of Anthracite coal produces 15,000 BTUs . Thus the gallon of oil yields the most BTUs of energy.

1. True
2. False

The area of Artificial Intelligence (AI) concerned with case-based reasoning utilizes a compact representation of the data to be used for future prediction. In case-based reasoning (CBR) systems, expertise is embodied in a library of past cases, rather than being encoded in classical rules.

1. True
2. False

The largest measured giant squid eye is 10.63 inches, roughly the size of a large dinner plate. Squids don't see eye-to-eye with blue whales because the eyes of the blue whale only span approximately six inches.

1. True
2. False

Supernova SN 1987A was one of the brightest stellar explosions since the invention of the telescope more than 400 years ago. It was the closest observed supernova since 1604.

1. True
2. False

Resin is a fluid (specifically, a hydrocarbon) that is secreted from certain plants, most commonly pine trees. Pine resin can be used as a sealant, glue and varnish. Oil of turpentine is used as a solvent and as a paint thinner. There are medicinal uses of pine resin, or pitch, as well.

1. True
2. False

The closed-world assumption (CWA) is the assumption that what is not known to be true must be false. In contrast, the open-world assumption (OWA) is the assumption that what is not known to be true is simply unknown.

1. True
2. False

The tricuspid valve is found in the right ventricle. The heart consists of four chambers - two atria (upper chambers) and two ventricles (lower chambers). There is a valve through which blood passes before leaving each chamber of the heart.

1. True
2. False

Buerger's disease has been associated with smoking. It can cause Inflammation and thrombosis in small- and medium-sized blood vessels, typically in the legs, leading to gangrene.

1. True
2. False

A neural network is a computer system modeled on the human brain and nervous system. The perceptron is the most basic form of an activation function within a neural network, in that it is a simple binary function that has only two possible results.

1. True
2. False

Lipitor is a drug that is used to treat high cholesterol. It doesn't have any effect on blood pressure,

1. True
2. False

Although the above statement is correct, Case-based reasoning (CBR) can also be used when one doesn't know the laws or causal structure, or when one is constantly adding new cases.