Volatile & gaseous poisons (MCQ)
1- Which of the following is a blood poison?
A- Animal venom
B- Carbon monoxide
C- hydrocyanic acid
معز.د
D- all of the above
شلفيط
2- Foetuses are more vulnerable to CO toxicity because:
A- Fetal Hb has more affinity to CO than adult Hb
B- Fetal elimination of CO is slower than that of the mother
C- There is a natural leftward shift of oxyhemoglobin dissociation curve
D- All of the above
3- When hearing and vision functions are impaired in CO poisoning?
A- 10%COHb B- 20%COHb C- 30%COHb
D- 50%COHb E- 70%COHb
4- Laboratory report of a CO poisoning case will reveal:
A- Metabolic acidosis
B- Respiratory alkalosis
C- Protein urea
D- Normal urine analysis
E- Elevation of alkaline phosphates enzyme
5- In cyanide poisoning, the type of hypoxia is :
A- Anaemic hypoxia
B- Cytotoxic hypoxia
C- Ischemia hypoxia
D- Hypoxic hypoxia
6- In carbon monoxide toxicity the colour of hypostasis is:
A- Brown
B- Bluish
C- Dark blue
D- Red
7- The following are antidotes for cyanide toxicity except:
A- Amyl nitrite
B- Sodium nitrite
C- Sodium thiosulphate
D- Magnesium sulphate
Dr. Moez
Moez_sholfet@y 1 Sholfet
ahoo.com
, E- Hydroxycobalamin
8- Carbon monoxide can be classified as a dangerous poison because of:
A- Its high affinity to haemoglobin
B- Can lead to muscular weakness and thus one cannot seek help from other
C- It is odourless
D- It is painless
E- All of the above
9- The most important factor that influences the rate of formation of carboxy
haemoglobin is:
A- Concentration of CO in air
B- Partial pressure of oxygen in arterial blood
C- Depth of respiration
D- Duration of exposure
10- The acute effects of carbon monoxide poisoning include the following
except:
A- Myocardial ischemia
B- Cerebral oedema
C- Acidosis
D- Hypoglycaemia
E- Visual and vestibular disturbances
11- Carbon monoxide is considered as a highly dangerous poison at all times
because:
A- It has great an affinity to Hb
B- It is painless
C- It is odourless
D- It cause muscle weakness
E- all of the above
12- Repeated exposure to carbon monoxide can be a cause of:
A- Headache and drowsiness
B- Mental disturbances
C- Parkinsonism
D- All of the above
E- None of the above
13- When a poisoned person survives acute carbon monoxide poisoning, a
later possible complication can be:
A- Memory disturbance
B- Parkinsonism like syndrome
C- Gait disturbance
D-All of the above are possible later risks
Dr. Moez
Moez_sholfet@y 2 Sholfet
ahoo.com
1- Which of the following is a blood poison?
A- Animal venom
B- Carbon monoxide
C- hydrocyanic acid
معز.د
D- all of the above
شلفيط
2- Foetuses are more vulnerable to CO toxicity because:
A- Fetal Hb has more affinity to CO than adult Hb
B- Fetal elimination of CO is slower than that of the mother
C- There is a natural leftward shift of oxyhemoglobin dissociation curve
D- All of the above
3- When hearing and vision functions are impaired in CO poisoning?
A- 10%COHb B- 20%COHb C- 30%COHb
D- 50%COHb E- 70%COHb
4- Laboratory report of a CO poisoning case will reveal:
A- Metabolic acidosis
B- Respiratory alkalosis
C- Protein urea
D- Normal urine analysis
E- Elevation of alkaline phosphates enzyme
5- In cyanide poisoning, the type of hypoxia is :
A- Anaemic hypoxia
B- Cytotoxic hypoxia
C- Ischemia hypoxia
D- Hypoxic hypoxia
6- In carbon monoxide toxicity the colour of hypostasis is:
A- Brown
B- Bluish
C- Dark blue
D- Red
7- The following are antidotes for cyanide toxicity except:
A- Amyl nitrite
B- Sodium nitrite
C- Sodium thiosulphate
D- Magnesium sulphate
Dr. Moez
Moez_sholfet@y 1 Sholfet
ahoo.com
, E- Hydroxycobalamin
8- Carbon monoxide can be classified as a dangerous poison because of:
A- Its high affinity to haemoglobin
B- Can lead to muscular weakness and thus one cannot seek help from other
C- It is odourless
D- It is painless
E- All of the above
9- The most important factor that influences the rate of formation of carboxy
haemoglobin is:
A- Concentration of CO in air
B- Partial pressure of oxygen in arterial blood
C- Depth of respiration
D- Duration of exposure
10- The acute effects of carbon monoxide poisoning include the following
except:
A- Myocardial ischemia
B- Cerebral oedema
C- Acidosis
D- Hypoglycaemia
E- Visual and vestibular disturbances
11- Carbon monoxide is considered as a highly dangerous poison at all times
because:
A- It has great an affinity to Hb
B- It is painless
C- It is odourless
D- It cause muscle weakness
E- all of the above
12- Repeated exposure to carbon monoxide can be a cause of:
A- Headache and drowsiness
B- Mental disturbances
C- Parkinsonism
D- All of the above
E- None of the above
13- When a poisoned person survives acute carbon monoxide poisoning, a
later possible complication can be:
A- Memory disturbance
B- Parkinsonism like syndrome
C- Gait disturbance
D-All of the above are possible later risks
Dr. Moez
Moez_sholfet@y 2 Sholfet
ahoo.com
