UllllllllHU lime 3 hours 18 minutos 14 seconds w Question Co

UllllllllHU lime: 3 hours, 18 minutos, 14 seconds. w Question Completion Status: A Moving to another question will save this response. Question 42 Basically the body core temperature is regulated during exercise in hot weather by OA decreasing the heart rate OB increasing the flow of warm blood to the body core so that it will be cooled by convection OC shifting warm core blood to the skin so that it can be cooled by evaporation of sweat o vasoconstriction of the vessels near the skin so that radiation by the sun does not warm the blood OE. C and D are both correct A Moving to another question wil save this response.

Solution

Q 42: E (C and D both are correct).

Q43: C. the respiratory control centers are located in the medulla oblongata and pons, which are the main parts of the brainstem.

Q44: A. Radiation. Body heat can be lost by evaporation, convection, conduction, and radiation. It is observed that 60% of heat loss at rest occurs by radiation. Whereas, during exercise in a cool environment, evaporation is the primary means for heat loss.

Q.45: False: Ambient humidity is the most important factor in determining the effectiveness of evaporative heat loss. For example, 50% ambient humidity means that ambient air contains only 50% of the air’s moisture carrying capacity at that specific temperature. With high humidity, the ambient vapor pressure approaches that of moist skin. In this case, evaporation greatly reduces even though large quantities of sweat bead on the skin and eventually move off. This form of sweating signifies useless water loss that can produce dehydration and overheating. For example, a dangerous increase in core temperature can occur in athlete who compete in moderate - to high-intensity sports that exceed 30 minutes duration in environments above 35°C and 60% relative humidity.