Question

An environmental temperature of 40°C

A. Is thermoneutral if there is a strong wind.

B. Leads to a generalized release of sympathetic vasoconstrictor tone.

C. Leads to an increase in heat loss by convection and radiation from the skin.

D. May lead to heat ** if relative humidity is 100 per cent.

E. Is appropriate for people in training for heat adaptation in a climatic chamber.

Answer 1

A. False The maximal thermoneutral temperature is around 30 degrees.

B. False Thermoregulatory release of vasoconstrictor tone is confined to skin blood vessels.

C. False Since the ambient temperature is higher than blood temperature, the only avenues left for heat loss are evaporation of sweat and fluid lining the respiratory tract.

D. True Exercise in such environments is inadvisable.

E. True Provided the relative humidity is low.