NUR 255 Test 3 Review | Comprehensive
Study Guide with Verified Exam Q&A | Latest
Update 2026/2027 -Already Graded A+
Midlands Technical College
Question 1
Men usually develop myasthenia gravis (MG) in their _______s.
A. 30s
B. 40s
C. 50s
D. teens
Answer: C
Rationale: Myasthenia gravis normally occurs from ages 20 to 30 in females but
presents later in men. Men usually develop MG in their 50s.
Question 2
Which muscle group is affected first in patients with myasthenia gravis (MG)?
A. Ocular muscles
B. Facial muscles
C. Trunk muscles
D. Limb muscles
Answer: A
Rationale: Ocular muscles are usually the first to be affected by MG. In most patients,
MG normally does not progress past the ocular muscles.
Question 3
Which diagnostic tool is highly sensitive for diagnosing myasthenia gravis (MG)?
A. Chest computed tomography (CT) scan
B. Single-fiber electromyography (EMG)
C. History and physical exam
D. Magnetic resonance imaging (MRI)
pg. 1
,Answer: B
Rationale: A single-fiber EMG is highly effective in diagnosing MG. A chest CT scan
might be done to assess the thymus if a confirmed diagnosis is made.
Question 4
Which overall goal would the nurse include in the plan of care for a patient with
myasthenia gravis (MG)? Select all that apply.
1. Restore normal muscle strength
2. Be aware of cardiac problems
3. Avoid complications
4. Maintain quality of life
5. Avoid fatigue
A. 3,5
B. 3,4,5
C. 2
D. 1,3,4,5
E. All
F. None
Answer: D
Rationale: Goals include restoring normal muscle strength (1), avoiding complications
(3), maintaining quality of life (4), and avoiding fatigue (5). Cardiac problems are not a
primary concern in MG.
Question 5
Which response would the nurse provide when caring for a female patient with
myasthenia gravis who is angry and depressed and says, "I can't do anything for longer
than a few minutes"?
A. "You may need to hire a home health aide."
B. "Why do you feel that you can't do anything?"
C. "Do you have family at home who can help you?"
D. "Try to adapt your schedule so you aren't as tired."
Answer: D
Rationale: Patients with MG should adapt their schedule to include ample rest periods
to prevent fatigue. Asking "why" questions is not therapeutic.
pg. 2
,Question 6
Which is an expected outcome in the patient with myasthenia gravis (MG)? Select all
that apply.
1. Free of medication side effects
2. Achieve optimal muscle function
3. Maintain liquid diet
4. Avoid complications
5. Maintain quality of life
A. 3,5
B. 2,4,5
C. 3
D. 1,2,4,5
E. All
F. None
Answer: D
Rationale: Expected outcomes include being free of medication side effects (1),
achieving optimal muscle function (2), avoiding complications (4), and maintaining
quality of life (5). Liquid diet is not recommended; semisolid foods are easier.
Question 7
Which clinical manifestation is considered the key feature of myasthenia gravis (MG)?
A. Fluctuating weakness of skeletal muscles
B. Sensory loss
C. Loss of reflexes
D. Muscle atrophy
Answer: A
Rationale: Fluctuating weakness of skeletal muscles is the key feature of MG. Muscle
atrophy is rare, and sensory loss/reflex loss do not occur.
Question 8
Which muscle group causes the most problems for patients with myasthenia gravis
(MG)?
A. Orbital
pg. 3
, B. Facial
C. Trunk and limbs
D. Swallowing and breathing
Answer: D
Rationale: Muscles used for swallowing and breathing can be affected, resulting in
aspiration and need for ventilation. Orbital muscles are the first involved and often the
only muscles involved.
Question 9
Which objective data would be collected when caring for a patient with myasthenia
gravis (MG) to assess the severity of the disease? Select all that apply.
1. Respiratory rate and depth
2. Oxygen saturation
3. Arterial blood gas (ABG) analysis
4. Pulmonary function tests
5. Cough and gag reflexes
A. 3,5
B. 1,2,3,4
C. 3
D. 1,2,4,5
E. All
F. None
Answer: E
Rationale: All listed assessments help gauge the severity of MG: respiratory rate and
depth (1), oxygen saturation (2), ABG analysis (3), pulmonary function tests (4), and
cough/gag reflexes (5).
Question 10
Weakness may be seen within ___ hour(s) of ingestion of an anticholinesterase drug
during a cholinergic crisis.
A. 1
B. 2
C. 3
D. 4
pg. 4
Study Guide with Verified Exam Q&A | Latest
Update 2026/2027 -Already Graded A+
Midlands Technical College
Question 1
Men usually develop myasthenia gravis (MG) in their _______s.
A. 30s
B. 40s
C. 50s
D. teens
Answer: C
Rationale: Myasthenia gravis normally occurs from ages 20 to 30 in females but
presents later in men. Men usually develop MG in their 50s.
Question 2
Which muscle group is affected first in patients with myasthenia gravis (MG)?
A. Ocular muscles
B. Facial muscles
C. Trunk muscles
D. Limb muscles
Answer: A
Rationale: Ocular muscles are usually the first to be affected by MG. In most patients,
MG normally does not progress past the ocular muscles.
Question 3
Which diagnostic tool is highly sensitive for diagnosing myasthenia gravis (MG)?
A. Chest computed tomography (CT) scan
B. Single-fiber electromyography (EMG)
C. History and physical exam
D. Magnetic resonance imaging (MRI)
pg. 1
,Answer: B
Rationale: A single-fiber EMG is highly effective in diagnosing MG. A chest CT scan
might be done to assess the thymus if a confirmed diagnosis is made.
Question 4
Which overall goal would the nurse include in the plan of care for a patient with
myasthenia gravis (MG)? Select all that apply.
1. Restore normal muscle strength
2. Be aware of cardiac problems
3. Avoid complications
4. Maintain quality of life
5. Avoid fatigue
A. 3,5
B. 3,4,5
C. 2
D. 1,3,4,5
E. All
F. None
Answer: D
Rationale: Goals include restoring normal muscle strength (1), avoiding complications
(3), maintaining quality of life (4), and avoiding fatigue (5). Cardiac problems are not a
primary concern in MG.
Question 5
Which response would the nurse provide when caring for a female patient with
myasthenia gravis who is angry and depressed and says, "I can't do anything for longer
than a few minutes"?
A. "You may need to hire a home health aide."
B. "Why do you feel that you can't do anything?"
C. "Do you have family at home who can help you?"
D. "Try to adapt your schedule so you aren't as tired."
Answer: D
Rationale: Patients with MG should adapt their schedule to include ample rest periods
to prevent fatigue. Asking "why" questions is not therapeutic.
pg. 2
,Question 6
Which is an expected outcome in the patient with myasthenia gravis (MG)? Select all
that apply.
1. Free of medication side effects
2. Achieve optimal muscle function
3. Maintain liquid diet
4. Avoid complications
5. Maintain quality of life
A. 3,5
B. 2,4,5
C. 3
D. 1,2,4,5
E. All
F. None
Answer: D
Rationale: Expected outcomes include being free of medication side effects (1),
achieving optimal muscle function (2), avoiding complications (4), and maintaining
quality of life (5). Liquid diet is not recommended; semisolid foods are easier.
Question 7
Which clinical manifestation is considered the key feature of myasthenia gravis (MG)?
A. Fluctuating weakness of skeletal muscles
B. Sensory loss
C. Loss of reflexes
D. Muscle atrophy
Answer: A
Rationale: Fluctuating weakness of skeletal muscles is the key feature of MG. Muscle
atrophy is rare, and sensory loss/reflex loss do not occur.
Question 8
Which muscle group causes the most problems for patients with myasthenia gravis
(MG)?
A. Orbital
pg. 3
, B. Facial
C. Trunk and limbs
D. Swallowing and breathing
Answer: D
Rationale: Muscles used for swallowing and breathing can be affected, resulting in
aspiration and need for ventilation. Orbital muscles are the first involved and often the
only muscles involved.
Question 9
Which objective data would be collected when caring for a patient with myasthenia
gravis (MG) to assess the severity of the disease? Select all that apply.
1. Respiratory rate and depth
2. Oxygen saturation
3. Arterial blood gas (ABG) analysis
4. Pulmonary function tests
5. Cough and gag reflexes
A. 3,5
B. 1,2,3,4
C. 3
D. 1,2,4,5
E. All
F. None
Answer: E
Rationale: All listed assessments help gauge the severity of MG: respiratory rate and
depth (1), oxygen saturation (2), ABG analysis (3), pulmonary function tests (4), and
cough/gag reflexes (5).
Question 10
Weakness may be seen within ___ hour(s) of ingestion of an anticholinesterase drug
during a cholinergic crisis.
A. 1
B. 2
C. 3
D. 4
pg. 4
