NURS 1150 FINAL EXAM 2026 | CLINICAL FOUNDATION /
LPN TO RN BRIDGE / CARE OF INDIVIDUALS WITH
CHRONIC HEALTH ALTERATIONS | LATEST EXAM WITH
1000% Q&A WITH RATIONALES
Question
What is the mechanism of action of hyperosmotic laxatives?
A) They draw water into the intestines, increasing the volume of stool and stimulating bowel
movements
B) They directly stimulate the intestinal walls to promote peristalsis
C) They absorb water and swell in the intestines to form a gel-like substance
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
Rationale: Hyperosmotic laxatives draw water into the intestines, increasing the volume of
stool and stimulating bowel movements. This osmotic effect is achieved by poorly
absorbed solutes that remain in the intestinal lumen, creating an osmotic gradient that
pulls water into the bowel. Examples include polyethylene glycol (Miralax) and lactulose.
Stimulant laxatives directly stimulate the intestinal walls to promote peristalsis. Bulk-
forming laxatives absorb water and swell to form a gel-like substance. Emollient laxatives
soften the stool by increasing water and fat content. Understanding the mechanism of
action of each laxative class is essential for selecting the appropriate agent based on the
patient's condition and needs.
Question
What is the mechanism of action of stimulant laxatives?
A) They directly stimulate the intestinal walls to promote peristalsis and increase bowel
activity
B) They draw water into the intestines, increasing the volume of stool
C) They absorb water and swell in the intestines to form a gel-like substance
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
,Rationale: Stimulant laxatives directly stimulate the intestinal walls to promote peristalsis
and increase bowel activity. They work by irritating the intestinal mucosa, which triggers
nerve reflexes that increase intestinal motility. Examples include senna and bisacodyl
(Dulcolax). Hyperosmotic laxatives draw water into the intestines. Bulk-forming laxatives
absorb water and swell. Emollient laxatives soften the stool. Stimulant laxatives are often
used for short-term relief of constipation and for bowel preparation, but they can cause
cramping and should not be used long-term due to the risk of dependence and electrolyte
imbalance.
Question
What is the mechanism of action of bulk-forming laxatives?
A) They absorb water and swell in the intestines, forming a gel-like substance that aids in
stool passage
B) They directly stimulate the intestinal walls to promote peristalsis
C) They draw water into the intestines, increasing the volume of stool
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
Rationale: Bulk-forming laxatives absorb water and swell in the intestines, forming a gel-
like substance that aids in stool passage. This increases stool bulk, which stimulates
peristalsis and promotes bowel movements. Examples include psyllium (Metamucil) and
methylcellulose. Bulk-forming laxatives are among the safest and most commonly
recommended laxatives for long-term use because they mimic the natural fiber in the diet
and are less likely to cause dependence or electrolyte imbalance. They require adequate
fluid intake to prevent obstruction or worsening of constipation. Understanding their
mechanism is essential for patient education.
Question
What is the mechanism of action of emollient laxatives?
A) They soften the stool by increasing the amount of water and fat it contains, making it
easier to pass
B) They directly stimulate the intestinal walls to promote peristalsis
C) They draw water into the intestines, increasing the volume of stool
D) They coat the stool and the intestinal lining, making it easier for the stool to pass
,Answer: A
Rationale: Emollient laxatives soften the stool by increasing the amount of water and fat it
contains, making it easier to pass. They are also known as stool softeners. An example is
docusate sodium (Colace), which is a surfactant that reduces the surface tension of the
stool, allowing water to penetrate more easily. Emollient laxatives are often used to prevent
constipation in patients who should avoid straining, such as those recovering from surgery
or childbirth. They are generally well tolerated but may take several days to produce an
effect. Lubricant laxatives, by contrast, coat the stool and intestinal lining.
Question
What is the mechanism of action of saline laxatives?
A) They contain magnesium or sodium salts that draw water into the intestines, increasing
pressure and promoting bowel movements
B) They directly stimulate the intestinal walls to promote peristalsis
C) They absorb water and swell in the intestines to form a gel-like substance
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
Rationale: Saline laxatives contain magnesium or sodium salts that draw water into the
intestines, increasing pressure and promoting bowel movements. Examples include
magnesium hydroxide (Milk of Magnesia) and magnesium citrate. Saline laxatives are fast-
acting and are often used for bowel preparation or for rapid relief of constipation. However,
they can cause electrolyte imbalances, especially with prolonged use, and should be used
with caution in patients with renal impairment or heart failure. Understanding their
mechanism and risks is essential for safe use.
Question
What is the mechanism of action of lubricant laxatives?
A) They coat the stool and the intestinal lining, making it easier for the stool to pass through
the colon
B) They directly stimulate the intestinal walls to promote peristalsis
C) They draw water into the intestines, increasing the volume of stool
D) They absorb water and swell in the intestines to form a gel-like substance
, Answer: A
Rationale: Lubricant laxatives coat the stool and the intestinal lining, making it easier for
the stool to pass through the colon. An example is mineral oil, which is a non-absorbable
oil that lubricates the stool and intestinal walls. Lubricant laxatives are useful for short-
term relief of constipation and for patients who should avoid straining. However, they can
interfere with the absorption of fat-soluble vitamins (A, D, E, K) and may cause aspiration if
accidentally inhaled, especially in elderly or debilitated patients. Understanding their
mechanism and risks is essential for safe use.
Question
What are laxatives?
A) Medications used to stimulate bowel movements or soften stool
B) Medications used to stop diarrhea
C) Medications used to treat infections
D) Medications used to reduce inflammation
Answer: A
Rationale: Laxatives are medications used to stimulate bowel movements or soften stool.
They are used to treat constipation, prepare the bowel for medical examinations, and
manage certain medical conditions. Laxatives work through various mechanisms,
including drawing water into the intestines, stimulating peristalsis, absorbing water to form
bulk, softening the stool, and lubricating the stool. They are available in many forms,
including oral tablets, capsules, liquids, and suppositories. Understanding the different
types of laxatives and their mechanisms is essential for safe and effective use. Loperamide
(Imodium) is an antidiarrheal, not a laxative.
Question
What is a common indication for laxative use?
A) Constipation
B) Diarrhea
C) Infection
D) Inflammation
Answer: A
LPN TO RN BRIDGE / CARE OF INDIVIDUALS WITH
CHRONIC HEALTH ALTERATIONS | LATEST EXAM WITH
1000% Q&A WITH RATIONALES
Question
What is the mechanism of action of hyperosmotic laxatives?
A) They draw water into the intestines, increasing the volume of stool and stimulating bowel
movements
B) They directly stimulate the intestinal walls to promote peristalsis
C) They absorb water and swell in the intestines to form a gel-like substance
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
Rationale: Hyperosmotic laxatives draw water into the intestines, increasing the volume of
stool and stimulating bowel movements. This osmotic effect is achieved by poorly
absorbed solutes that remain in the intestinal lumen, creating an osmotic gradient that
pulls water into the bowel. Examples include polyethylene glycol (Miralax) and lactulose.
Stimulant laxatives directly stimulate the intestinal walls to promote peristalsis. Bulk-
forming laxatives absorb water and swell to form a gel-like substance. Emollient laxatives
soften the stool by increasing water and fat content. Understanding the mechanism of
action of each laxative class is essential for selecting the appropriate agent based on the
patient's condition and needs.
Question
What is the mechanism of action of stimulant laxatives?
A) They directly stimulate the intestinal walls to promote peristalsis and increase bowel
activity
B) They draw water into the intestines, increasing the volume of stool
C) They absorb water and swell in the intestines to form a gel-like substance
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
,Rationale: Stimulant laxatives directly stimulate the intestinal walls to promote peristalsis
and increase bowel activity. They work by irritating the intestinal mucosa, which triggers
nerve reflexes that increase intestinal motility. Examples include senna and bisacodyl
(Dulcolax). Hyperosmotic laxatives draw water into the intestines. Bulk-forming laxatives
absorb water and swell. Emollient laxatives soften the stool. Stimulant laxatives are often
used for short-term relief of constipation and for bowel preparation, but they can cause
cramping and should not be used long-term due to the risk of dependence and electrolyte
imbalance.
Question
What is the mechanism of action of bulk-forming laxatives?
A) They absorb water and swell in the intestines, forming a gel-like substance that aids in
stool passage
B) They directly stimulate the intestinal walls to promote peristalsis
C) They draw water into the intestines, increasing the volume of stool
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
Rationale: Bulk-forming laxatives absorb water and swell in the intestines, forming a gel-
like substance that aids in stool passage. This increases stool bulk, which stimulates
peristalsis and promotes bowel movements. Examples include psyllium (Metamucil) and
methylcellulose. Bulk-forming laxatives are among the safest and most commonly
recommended laxatives for long-term use because they mimic the natural fiber in the diet
and are less likely to cause dependence or electrolyte imbalance. They require adequate
fluid intake to prevent obstruction or worsening of constipation. Understanding their
mechanism is essential for patient education.
Question
What is the mechanism of action of emollient laxatives?
A) They soften the stool by increasing the amount of water and fat it contains, making it
easier to pass
B) They directly stimulate the intestinal walls to promote peristalsis
C) They draw water into the intestines, increasing the volume of stool
D) They coat the stool and the intestinal lining, making it easier for the stool to pass
,Answer: A
Rationale: Emollient laxatives soften the stool by increasing the amount of water and fat it
contains, making it easier to pass. They are also known as stool softeners. An example is
docusate sodium (Colace), which is a surfactant that reduces the surface tension of the
stool, allowing water to penetrate more easily. Emollient laxatives are often used to prevent
constipation in patients who should avoid straining, such as those recovering from surgery
or childbirth. They are generally well tolerated but may take several days to produce an
effect. Lubricant laxatives, by contrast, coat the stool and intestinal lining.
Question
What is the mechanism of action of saline laxatives?
A) They contain magnesium or sodium salts that draw water into the intestines, increasing
pressure and promoting bowel movements
B) They directly stimulate the intestinal walls to promote peristalsis
C) They absorb water and swell in the intestines to form a gel-like substance
D) They soften the stool by increasing the amount of water and fat it contains
Answer: A
Rationale: Saline laxatives contain magnesium or sodium salts that draw water into the
intestines, increasing pressure and promoting bowel movements. Examples include
magnesium hydroxide (Milk of Magnesia) and magnesium citrate. Saline laxatives are fast-
acting and are often used for bowel preparation or for rapid relief of constipation. However,
they can cause electrolyte imbalances, especially with prolonged use, and should be used
with caution in patients with renal impairment or heart failure. Understanding their
mechanism and risks is essential for safe use.
Question
What is the mechanism of action of lubricant laxatives?
A) They coat the stool and the intestinal lining, making it easier for the stool to pass through
the colon
B) They directly stimulate the intestinal walls to promote peristalsis
C) They draw water into the intestines, increasing the volume of stool
D) They absorb water and swell in the intestines to form a gel-like substance
, Answer: A
Rationale: Lubricant laxatives coat the stool and the intestinal lining, making it easier for
the stool to pass through the colon. An example is mineral oil, which is a non-absorbable
oil that lubricates the stool and intestinal walls. Lubricant laxatives are useful for short-
term relief of constipation and for patients who should avoid straining. However, they can
interfere with the absorption of fat-soluble vitamins (A, D, E, K) and may cause aspiration if
accidentally inhaled, especially in elderly or debilitated patients. Understanding their
mechanism and risks is essential for safe use.
Question
What are laxatives?
A) Medications used to stimulate bowel movements or soften stool
B) Medications used to stop diarrhea
C) Medications used to treat infections
D) Medications used to reduce inflammation
Answer: A
Rationale: Laxatives are medications used to stimulate bowel movements or soften stool.
They are used to treat constipation, prepare the bowel for medical examinations, and
manage certain medical conditions. Laxatives work through various mechanisms,
including drawing water into the intestines, stimulating peristalsis, absorbing water to form
bulk, softening the stool, and lubricating the stool. They are available in many forms,
including oral tablets, capsules, liquids, and suppositories. Understanding the different
types of laxatives and their mechanisms is essential for safe and effective use. Loperamide
(Imodium) is an antidiarrheal, not a laxative.
Question
What is a common indication for laxative use?
A) Constipation
B) Diarrhea
C) Infection
D) Inflammation
Answer: A
