After seven half-lives of a drug, which of the following ...

[cookcarl]

After seven half-lives of a drug, which of the following percentages of the medication or drug remains in the plasma of the person taking that drug?
 
  a. less than 1
  b. 1.5
  c. 5
  d. 50

Question 2

During the assessment of a healthy older adult, which normal age-related changes in memory functioning should a nurse anticipate?
 
  A) Mild deterioration in short-term memory; no change in long-term memory
  B) Mild deterioration in short-term memory; mild deterioration in long-term memory
  C) No change in short-term memory; mild deterioration in long-term memory
  D) No change in short-term memory; no change in long-term memory

[shoemake]

Answer to Question 1

A
After seven half-lives, less than 1 of the medication remains in the plasma. A drug's half-life is the time required for plasma concentrations of a drug to decrease to half of an initial value. After each successive half-life, half of the medication remains in the plasma that was there before. For instance, after the eighth half-life, less than 0.5 of the medication remains in the plasma, which is half of the medication in the plasma that was present after the seventh half-life

Answer to Question 2

A

[cookcarl]

Thank you

[shoemake]

No problemo