Science:Math Exam Resources/Courses/MATH102/December 2014/Question A 05

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MATH102 December 2014
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Question A 05

The model given below on the left has been suggested for the spread of HIV within the immune system of an infected person. is the density of healthy immune cells, is the density of HIV-infected immune cells and is the density of virus in the blood of a patient. Which of the options on the right gives a correct interpretation of some part of the model?

  1. Healthy cells can become infected when they encounter infected cells.
  2. Healthy cells can become infected when they encounter virus.
  3. Virus is produced at a rate proportional to the current viral density.
  4. Infected cells die at a rate proportional to the viral density.
  5. Virus is killed/removed at a rate proportional to the density of healthy immune cells.

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