Thermoregulation in Extreme Environments Practice Questions

Question 1

Hypothermia is used in all except:

Accepted Answer

Arrhythmia

Answer

Hyperthermia

Answer

Neonatal asphyxia

Answer

Cardiac surgery

Question 2

Lesion of preoptic nucleus of hypothalamus is associated with which of the following conditions?

Accepted Answer

Hyperthermia

Answer

Impaired thermoregulation

Answer

Increased body temperature

Answer

Normal thermoregulation

Question 3

What is the temperature threshold that defines hyperthermia?

Accepted Answer

> 40 with autonomic dysfunction

Answer

36.5-37.5 degC

Answer

>37.5-38.3 degC

Answer

> 38.3 degC

Question 4

All the following are causes of hyperthermia except

Accepted Answer

Hypothyroidism

Answer

Cerebral hemorrhage

Answer

Succinyl Choline

Answer

Pheochromocytoma

Question 5

Which of the following is NOT true about heat stroke?

Accepted Answer

Hypothermia occurs

Answer

Sweating is absent

Answer

Mental confusion occurs

Answer

Body temperature >104°F

Question 6

BMR is increased in all except:

Accepted Answer

Hypothyroidism

Answer

Fever

Answer

Exercise

Answer

Hyperthyroidism

Question 7

Which of the following physiological changes occur during heat acclimatization?

Accepted Answer

Increased aldosterone secretion

Answer

Decreased Renal Blood Flow

Answer

Increased urine sodium

Answer

Decreased sweat sodium concentration

Question 8

What is the primary mechanism underlying hyperthermia?

Accepted Answer

Failure of thermoregulation

Answer

Temperature > 40°C with autonomic dysfunction

Answer

Temperature > 41.5°C

Answer

No change in hypothalamic set point

Question 9

Which of the following measurement sites most closely reflects core body temperature?

Accepted Answer

Rectal

Answer

Axillary

Answer

Oral

Answer

Surface

Question 10

In human beings, the least useful physiological response to low environmental temperature is:

Accepted Answer

Piloerection

Answer

Shivering

Answer

Vasoconstriction

Answer

Release of thyroxine

Thermoregulation in Extreme Environments — MCQs

Thermoregulation in Extreme Environments — MCQs

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