Question 1

Pharmacodynamics describes the physiological processes that act on a drug once it enters the body,or how the body handles the drug.

Accepted Answer

A) True 
 B)False

Question 2

Pharmacological effect is achieved by:

Accepted Answer

A)   the portion of free or unbound drug.
B)   the portion of protein-bound drug.
C)   ionisation.
D)   penetrating the blood-brain barrier.

Question 3

A drug mechanism that works to neutralise stomach acid is considered to be:

Accepted Answer

A)   an action targeting ion channels.
B)   a chemical action.
C)   an agonist action.
D)   a physical action. B

Question 4

Competitive inhibition slows down the rate of normal chemical reactions because:

Accepted Answer

A)   the normal substrate is malfunctioning.
B)   the target enzyme binds temporarily with a look-alike substrate rather than its actual substrate.
C)   it takes a long time for the enzyme to develop memory or recognition of the competing substances.
D)   it causes enzyme confusion. B

Question 5

Some terms that describe interactions between drugs and receptors include: (Select all that apply)

Accepted Answer

A)   antagonism.
B)   agonism.
C)   first mechanism
D)   first messenger

Question 6

In general,a medicine that acts by chemical or physical means can be identified by its dose,which is considerably higher than that required by medicines that act by interacting with a receptor or enzyme system.

Accepted Answer

A) True 
 B)False

Question 7

In disrupting the synthesis of folic acid in bacteria,sulfonamides act:

Accepted Answer

A)   as competitive inhibitors.
B)   as non-competitive inhibitors.
C)   by physical action.
D)   by none of the above.

Question 8

The extent of binding of a drug to a receptor is termed:

Accepted Answer

A)   potency.
B)   specificity.
C)   affinity.
D)   efficacy.

Question 9

Which one of the following statements about pharmacodynamics is true?

Accepted Answer

A)   A partial agonist can be as effective as an antagonist.
B)   Ion channels do not have receptors.
C)   Second messenger systems always involve G-proteins.
D)   The antiasthma agent theophylline acts via a tyrosine kinase-linked receptor. A

Question 10

When a drug acts through non-competitive inhibition of an enzyme,it:

Accepted Answer

A)   can be overcome by giving more of the enzyme substrate.
B)   is usually reversible.
C)   binds to a distinct site away from the active site.
D)   is lethal to the person receiving treatment.

Exam 16: Pharmacodynamics

Pharmacodynamics describes the physiological processes that act on a drug once it enters the body,or how the body handles the drug.

Correct Answer
verified

Pharmacological effect is achieved by:

Correct Answer
verified

A drug mechanism that works to neutralise stomach acid is considered to be:

Correct Answer
verified
B

Competitive inhibition slows down the rate of normal chemical reactions because:

Correct Answer
verified
B

Some terms that describe interactions between drugs and receptors include: (Select all that apply)

Correct Answer
verified

In general,a medicine that acts by chemical or physical means can be identified by its dose,which is considerably higher than that required by medicines that act by interacting with a receptor or enzyme system.

Correct Answer
verified

In disrupting the synthesis of folic acid in bacteria,sulfonamides act:

Correct Answer
verified

The extent of binding of a drug to a receptor is termed:

Correct Answer
verified

Which one of the following statements about pharmacodynamics is true?

Correct Answer
verified
A

When a drug acts through non-competitive inhibition of an enzyme,it:

Correct Answer
verified

Exam 16: Pharmacodynamics

Pharmacodynamics describes the physiological processes that act on a drug once it enters the body,or how the body handles the drug.

Correct AnswerverifiedShow Answer

Pharmacological effect is achieved by:

Correct AnswerverifiedShow Answer

A drug mechanism that works to neutralise stomach acid is considered to be:

Correct AnswerverifiedB

Competitive inhibition slows down the rate of normal chemical reactions because:

Correct AnswerverifiedB

Some terms that describe interactions between drugs and receptors include: (Select all that apply)

Correct AnswerverifiedShow Answer

In general,a medicine that acts by chemical or physical means can be identified by its dose,which is considerably higher than that required by medicines that act by interacting with a receptor or enzyme system.

Correct AnswerverifiedShow Answer

In disrupting the synthesis of folic acid in bacteria,sulfonamides act:

Correct AnswerverifiedShow Answer

The extent of binding of a drug to a receptor is termed:

Correct AnswerverifiedShow Answer

Which one of the following statements about pharmacodynamics is true?

Correct AnswerverifiedA

When a drug acts through non-competitive inhibition of an enzyme,it:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified