Phrenology is basically the study of personality through the study of the shape of the skull. The basis of this theory is that the brain conforms to the shape of the head and its contours. This pseudoscience says that because we have isolated where different parts of personality come from we can tell how dominant…
Schizophrenia is a serious brain disorder. It is a disease that makes it difficult for a person to tell the difference between real and unreal experiences, to think logically, to have normal emotional responses to other, and to behave normally in social situations. People with schizophrenia may also have difficulty in remembering, talking, and behaving…
Lyme disease is a tick-transmitted inflammatory disorder characterized by an early focal skin lesion, and subsequently a growing red area on the skin (erythema chronicum migrans or ECM). The disorder may be followed weeks later by neurological, heart or joint abnormalities. Symptoms The first symptom of Lyme disease is a skin lesion. Known as erythema…
The potent drug cocaine was first prescribed as an anesthetic and a painkiller by doctors who believed that it was a safe substitute for morphine. The drug is a white, crystalline compound that has been processed from the leaves of the coca plant (Erythroxylum coca), a tropical shrub commonly found wild in Peru and Bolivia…
Anabolic steroids are performance enhancing drugs. They are a synthetic form of the chemical testosterone that is normally found in the body. By taking anabolic steroids, a person’s testosterone level can be raised up to a hundred times more than the usual amount of 2.5 to 10 mg. Per day. The increase in testosterone increases…
There are many possible reasons why a child may grow slowly, including: hereditary factors (short parents), diseases affecting the kidneys; heart, lungs or intestines; hormone imbalances; severe stress or emotional deprivation; infections in the womb before birth; bonediseases; and genetic or chromosomal abnormalities. The Turner Syndrome (known as Ullrich-Turner Syndrome in Germany) is a congenital…
Memory loses are sometimes trivial and meaningless and go unrecognized. However, when these loses are so great that a person does not know who or where they are the concerns are quite grave. Although it is realize that Alzheimer’s disease destroys the brain memory function, many do not realize precisely how the memory is destroyed…
Type II muscle fibers oxidize lactate at a very fast rates. When muscle contraction produces a significant amount of lactate, it is then released into the central circulation of the blood, and within seconds it is made available to that muscle for energy. Therefore, 75% of the lactate produced from high intensity exercise is made…
Since ancient history, many athletes have resorted to performance enhancing aids to give them an edge on their opponents. Greek Olympians used strychnine and hallucinogenic mushrooms to psych up for an event. “In 1886 a French cyclist was the first athlete to die from using a performance enhancer, called speedballs, a mixture of cocaine and…
In order to offer the operator a significant amount of control over the vehicle, certain systems must be installed. The drive train connects the engine to the wheels while also providing various speeds for the driver. The brake system gives the operator a way to slow or stop the vehicle and the steering system lets…
The engine is the vehicle’s main source of power. The engine uses fuel and burns it to produce mechanical power. Chemical Energy converted into Mechanical Energy The heat produced by the combustion is used to create pressure which is then used to drive a mechanical device. Internal vs External Prior to the 20th century, the…
The Workplace Hazardous Materials Information System (WHMIS) is a comprehensive national system for safe management of hazardous chemicals, which is legislated by both the federal and provincial jurisdictions. WHMIS is a three (3) part effort of labour, industry, and government which took several years to develop. It is unique in that it represents a consensus…
Scale is a measuring device that enables designers to represent accurately the size of an object in a technical drawing. The term scale describes the ratio of the drawing size relative to the actual size of the object. When you draw an object to scale, the drawing represents a ratio of the object size. With…
Gears are available in various shapes and sizes. Their application throughout the transportation industry varies greatly. When two (2) or more are used together as an assembly they are commonly referred to as a transmission (gearbox). The transmission’s primary task is to transmit motion, change the direction of the motion and/or change the rate of…
The modern vehicle is made up of a variety of parts and components all working together to achieve a final product: the “car.” These parts and components are assembled in groups to perform various tasks. These groups are referred to as systems. Understanding these automotive systems is crucial for anyone interested in car maintenance and…
Modern vehicles travel faster and farther than ever before. Some of the road conditions encountered are far from optimum. As a result, the tire and wheel assembly is put through a tremendous amount of stress. Therefore, proper maintenance is necessary, as they are the only connection between the road and the vehicle. RIMS Rims are…
Throughout the course of servicing and/or repairing a vehicle, it will be necessary from time to time to raise the vehicle off the ground in order to access certain areas on the vehicle. To accomplish this you will need to use either a hydraulic floor jack or a hoist. Both units use the basic principles…
Information Welding is a process whereby two (2) metals are joined together. In today’s transportation industries welding is an integral part of both the manufacturing process and the service sector. There are two methods of welding used: Fusion Non-Fusion Fusion welding is a process where the edges of two (2) pieces of metal are brought…
In the modern engine, the lubrication system is more vital than every due to the very low tolerances and higher temperatures that the engines must perform at. System Components Oil pan – holds the oil required for the system, provides a means of draining the oil through the oil plug and houses the oil pump…
Function Resistors restrict the flow of electric current, for example a resistor is placed in series with a light-emitting diode (LED) to limit the current passing through the LED. Connecting and soldering Resistors may be connected either way round because they are not polarized (no negative or positive). They are not damaged by heat when…