Medical Physics and Biophysics Chapter 1 Quiz

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Questions and Answers

What is the primary focus of biophysics?

  • Physics of large biomolecules and viruses (correct)
  • Medical applications of lasers
  • Diagnosis and treatment of disease and injury
  • Use of radiation in medicine

Which branch of physics involves the use of physical agents like manipulation and heat in treating diseases?

  • Physical medicine (correct)
  • Radiological physics
  • Physical therapy
  • Biophysics

What is the primary difference between medical physics and biophysics?

  • Medical physics involves the physics of viruses
  • Biophysics primarily involves the physics of viruses and large biomolecules (correct)
  • Biophysics focuses on the physics of the human body
  • Medical physics deals with large biomolecules

In which field would you find the study of transport of material across cell membranes?

<p>Biophysics (C)</p> Signup and view all the answers

What is one application of physics mentioned in relation to the stethoscope?

<p>Diagnosis of diseases (C)</p> Signup and view all the answers

Which field within medical physics involves the use of radionuclides in medicine?

<p>Radiological physics (B)</p> Signup and view all the answers

What is the most common method of indicating pressure in medicine?

<p>Measuring by the height of a column of mercury (B)</p> Signup and view all the answers

Which unit is used for measuring pressure in the SI system?

<p>Pascal (C)</p> Signup and view all the answers

What does 'stress' refer to in the context of a solid material?

<p>Force per unit area (A)</p> Signup and view all the answers

What is the equation to calculate pressure under a column of liquid?

<p>$P = \rhogh$ (D)</p> Signup and view all the answers

What does absolute pressure represent?

<p>Pressure reading with atmospheric pressure (B)</p> Signup and view all the answers

What is gauge pressure equal to?

<p>$\text{absolute pressure} - \text{atmospheric pressure}$ (B)</p> Signup and view all the answers

What is the purpose of a manometer?

<p>To measure both positive and negative pressures (B)</p> Signup and view all the answers

Which fluid is commonly used in a manometer to measure pressure?

<p>Mercury (B)</p> Signup and view all the answers

What is the main difference between a mercury-type sphygmomanometer and an aneroid-type sphygmomanometer?

<p>The way pressure is indicated (B)</p> Signup and view all the answers

What happens to the fluid levels in a U-shaped manometer when measuring pressure?

<p>They change until the difference in levels equals the pressure (D)</p> Signup and view all the answers

How does a sphygmomanometer measure blood pressure?

<p>By changing the shape of a flexible container (B)</p> Signup and view all the answers

What is the purpose of cerebrospinal fluid (CSF) in the brain?

<p>Cushioning and protecting the brain (B)</p> Signup and view all the answers

What is the main reason behind the bends (decompression sickness) in divers?

<p>Formation of bubbles in the tissues due to sudden decrease in pressure during ascent (D)</p> Signup and view all the answers

According to Henry's law, why does more nitrogen get dissolved in the blood and tissues as a diver goes deeper?

<p>Proportional to the partial pressure of nitrogen in contact with the liquid (A)</p> Signup and view all the answers

How does Hyperbaric Oxygen Therapy (HOT) help in treating gas gangrene patients?

<p>The bacillus causing gas gangrene dies due to the presence of oxygen (B)</p> Signup and view all the answers

Why do victims of carbon monoxide poisoning have difficulty getting enough oxygen to their tissues?

<p>Carbon monoxide binds to hemoglobin, preventing oxygen transport (C)</p> Signup and view all the answers

What happens when a diver ascends too quickly?

<p>Bubbles form in the tissues and joints due to sudden decrease in pressure (C)</p> Signup and view all the answers

How does the amount of gas dissolved in a liquid change according to Henry's law?

<p>Proportional to the partial pressure of the gas (B)</p> Signup and view all the answers

According to Boyle's law, what is constant for a fixed quantity of gas at a fixed temperature?

<p>Pressure (C)</p> Signup and view all the answers

What part of the body contains air cavities that can be affected by sudden pressure changes?

<p>Middle ear (B)</p> Signup and view all the answers

At what depth does oxygen poisoning typically occur due to high partial pressure of oxygen?

<p>40 m (D)</p> Signup and view all the answers

What happens to the air in the lungs when underwater compared to at sea level?

<p>It becomes more dense (C)</p> Signup and view all the answers

Which body part is responsible for equalizing pressure in the middle ear?

<p>Eustachian tube (B)</p> Signup and view all the answers

What can excess nitrogen in the blood and tissues at a depth of 30m result in?

<p>Decompression sickness (C)</p> Signup and view all the answers

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