NURS 251 EXAM REAL EXAM 2026 | PORTAGE LEARNING PHARMACOLOGY MODULE 7| REAL EXAM QUESTIONS AND CORRECT ANSWERS | VERIFIED ANSWERS | UPDATED VERSION | GRADED A+

NURS 251 EXAM REAL EXAM 2026 | PORTAGE LEARNING PHARMACOLOGY MODULE 7| REAL
EXAM QUESTIONS AND CORRECT ANSWERS | VERIFIED ANSWERS | UPDATED VERSION |
GRADED A+

Question 1
Which of the following is defined as the study of how chemicals and biological systems interact?
A) Toxicology
B) Pharmacology
C) Physiology
D) Biotechnology
E) Microbiology
Correct Answer: B) Pharmacology
Rationale: Pharmacology is the broad science that explores the interaction between
chemical substances (drugs) and living organisms, covering their origin, nature, and effects.

Question 2
Pharmacology as a science is integrated into which of the following fields?
A) Food sciences
B) Agriculture
C) Medicine
D) Toxicology
E) All of the above
Correct Answer: E) All of the above
Rationale: Pharmacology is a multidisciplinary science used in medicine for treatment, food
science for additives/preservatives, agriculture for pesticides/animal health, and toxicology
for poison studies.

Question 3
What are the three primary sources of drugs used in modern medicine?
A) Plants, fungi, and minerals
B) Natural sources, chemical synthesis, and biotechnology
C) Animals, minerals, and bacteria
D) Synthetic, semisynthetic, and organic
E) Laboratory chemicals, DNA, and proteins
Correct Answer: B) Natural sources, chemical synthesis, and biotechnology
Rationale: Modern drugs are primarily sourced through natural means
(plants/animals/minerals), laboratory chemical synthesis, or advanced biotechnology like
recombinant DNA.

Question 4
From which part of the Atropa belladonna plant is the drug Atropine derived?
A) The leaves
B) The seeds
C) The roots

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D) The stem
E) The flowers
Correct Answer: C) The roots
Rationale: Atropine, an anticholinergic drug, is traditionally extracted from the roots of the
belladonna (deadly nightshade) plant.

Question 5
Digitalis is derived from which of the following natural sources?
A) Purple foxglove leaves
B) Opium poppy seeds
C) Erythroxylum coca leaves
D) Taxus baccata bark
E) Jaborandi leaves
Correct Answer: A) Purple foxglove leaves
Rationale: The cardiac medication Digitalis (Digoxin) is sourced from the leaves of the
Digitalis purpurea, commonly known as purple foxglove.

Question 6
Which drug is extracted from the seeds of the opium poppy (Papaver somniferum)?
A) Cocaine
B) Atropine
C) Morphine
D) Ephedrine
E) Pilocarpine
Correct Answer: C) Morphine
Rationale: Morphine is a powerful analgesic derived directly from the seed pods/seeds of the
opium poppy plant.

Question 7
How is the drug Atropine classified?
A) Analgesic
B) Anticholinergic
C) Local Anesthetic
D) Sympathomimetic
E) Thrombolytic
Correct Answer: B) Anticholinergic
Rationale: Atropine blocks acetylcholine receptors in the parasympathetic nervous system,
classifying it as an anticholinergic agent.

Question 8
Cocaine is categorized as which type of pharmacological agent?
A) Cardiac agent

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B) Analgesic
C) Local anesthetic
D) Smooth muscle relaxant
E) Sympathomimetic
Correct Answer: C) Local anesthetic
Rationale: Historically, cocaine was the first local anesthetic used in medical practice due to
its ability to block nerve conduction.

Question 9
Digoxin belongs to which of the following drug categories?
A) Antineoplastic
B) Cardiac agent
C) Antipyretic
D) Antihistamine
E) Barbiturate
Correct Answer: B) Cardiac agent
Rationale: Digoxin is used primarily to treat heart failure and certain heart rhythm
problems, placing it in the category of cardiac agents.

Question 10
Which of the following drugs is classified as a Sympathomimetic?
A) Morphine
B) Ephedrine
C) Pilocarpine
D) Papaverine
E) Digitalis
Correct Answer: B) Ephedrine
Rationale: Ephedrine mimics the effects of the sympathetic nervous system (fight or flight),
making it a sympathomimetic drug.

Question 11
Morphine is best described as which type of drug?
A) Antiemetic
B) Diuretic
C) Analgesic
D) Anticoagulant
E) Antihypertensive
Correct Answer: C) Analgesic
Rationale: Morphine is primarily used for the relief of severe pain, which is the definition of
an analgesic.

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Question 12
Papaverine is classified as a:
A) Sympathomimetic
B) Parasympathomimetic
C) Smooth muscle relaxant
D) Antipyretic
E) Thrombolytic
Correct Answer: C) Smooth muscle relaxant
Rationale: Papaverine acts directly on smooth muscle to cause relaxation, often used to treat
spasms or vascular issues.

Question 13
Which drug is a Parasympathomimetic (Paraymphathomimetic)?
A) Morphine
B) Cocaine
C) Pilocarpine
D) Ephedrine
E) Atropine
Correct Answer: C) Pilocarpine
Rationale: Pilocarpine stimulates the parasympathetic nervous system, classifying it as a
parasympathomimetic.

Question 14
Which specific plant produces Ephedrine?
A) Papaver somniferum
B) Digitalis purpurea
C) Ephedra sinica
D) Taxus baccata
E) Erythroxylum coca
Correct Answer: C) Ephedra sinica
Rationale: Ephedrine is derived from the Ephedra sinica plant, which has been used in
traditional medicine for centuries.

Question 15
The drug Pilocarpine is derived from which plant?
A) Atropa belladonna
B) Pilocarpus jaborandi
C) Taxus baccata
D) Erythroxylum coca
E) Papaver somniferum
Correct Answer: B) Pilocarpus jaborandi
Rationale: Pilocarpine is extracted from the leaves of the Pilocarpus jaborandi plant.