Quiz Questions

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What's the difference between X-Ray, CT Scan, MRI, and more?


1) X-rays use electromagnetic radiation to produce images of bones and dense structures within the body. They are commonly used to detect fractures, infections, tumors, and other abnormalities. X-rays are fast, relatively affordable, and widely available.
2) CT scans utilize X-rays combined with advanced computer processing to create detailed cross-sectional images of the body. Unlike traditional X-rays, CT scans can capture bones, organs, blood vessels, and soft tissues, making them valuable for diagnosing internal injuries, tumors, infections, and blood clots.
3) MRI employs a powerful magnetic field and radio waves to generate highly detailed images of soft tissues, organs, and internal structures. It offers excellent contrast between different tissue types and is particularly useful for imaging the brain, spinal cord, joints, and muscles. Since MRI does not use ionizing radiation, it is a safer imaging option, especially for pregnant women and children. However, MRI scans take longer, are more expensive, and may not be suitable for individuals with certain medical implants or metal objects in their bodies.
4) A PET scan measures how active different areas of the brain are by detecting how much sugar they consume for energy. The scan highlights areas of high activity in bright colors, as regions using more sugar appear more intensely lit. Since cancer cells consume large amounts of sugar to fuel their rapid, uncontrolled growth, they appear as the brightest areas on a PET scan. This imaging technique is commonly used to detect cancerous cells in the body.
5) MRA (Magnetic Resonance Angiography) scans visualize blood flow within the brain's vascular system. It helps identify vessel narrowing, blockages, or other abnormalities in blood circulation.

DID YOU KNOW❓

  • Birds do not urinate.
  • Horses and cows sleep while standing.
  • The bat is the only mammal capable of flight. Its leg bones are so thin that it cannot walk.
  • Even when a snake’s eyes are closed, it can still see through its eyelids.
  • Despite their fluffy white fur, Polar Bears actually have black skin.
  • The average housefly lives only 2 to 3 weeks.
  • For every human, there are approximately one million ants.
  • A small amount of alcohol on a scorpion will drive it insane and cause it to sting itself to death.
  • Alligators and sharks can live for up to 100 years.
  • A honeybee has two stomachs: one for honey and one for food.
  • Elephants weigh less than the tongue of a blue whale. A blue whale’s heart is the size of a car.
  • Blue whales are the largest creatures to ever roam the Earth.
  • A cockroach can survive for about a week without its head before dying of starvation.
  • When a dolphin is sick or injured, its cries of distress prompt other dolphins to assist, helping it surface to breathe.
  • A snail can sleep for up to 3 years.
  • The fastest bird is the peregrine falcon it can fly at 390 km/h or 108 mph.
  • A cow produces nearly 200,000 glasses of milk in her lifetime.
  • The leech has 32 brains.
  • The average outdoor cat lives only 3 years, while indoor-only cats can live 16 years or longer.
  • Sharks are immune to every disease, including cancer.
  • A mosquito’s proboscis has 47 sharp edges to help it cut through skin and even protective clothing.
  • The human brain has a memory capacity of over 2.5 million petabytes, equivalent to 2,500,500 gigabytes.

Knowledge is Power!