The key adaptation to heat acclimatisation is:Group of answer choicescardiac hypertrophyexpanded blood volumereduced sweat sensitivity
Question
The key adaptation to heat acclimatisation is:Group of answer choicescardiac hypertrophyexpanded blood volumereduced sweat sensitivity
Solution
The key adaptation to heat acclimatization is expanded blood volume.
Here's why:
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Heat acclimatization is the process by which the body adapts to high temperatures over time. This process involves several physiological changes.
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One of the most important changes is the expansion of blood volume. This happens because the body needs to cool itself down in hot conditions, and one of the ways it does this is by sending more blood to the skin where it can be cooled by sweat evaporation.
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As the body gets used to the heat, it starts to produce more blood to facilitate this cooling process. This is why expanded blood volume is considered a key adaptation to heat acclimatization.
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While cardiac hypertrophy (enlargement of the heart muscle) and reduced sweat sensitivity can also occur as a result of heat acclimatization, they are not considered the key adaptation. Cardiac hypertrophy can help the heart pump more blood, but it's not a direct response to heat. Reduced sweat sensitivity means the body becomes more efficient at sweating, but this is a secondary adaptation that happens after the blood volume has already expanded.
Similar Questions
Heat acclimation is frequently added to training regimens. Adaptations to heat that have the potential to improve athletic performance as a consequence of heat adaptations include:(Select all that apply, even if only one applies)Group of answer choicesIncreased cardiac outputIncreased skin blood flowLower sweat thresholdIncreased thermogenic capacityPlasma expansionLower resting heart rate
The primary mechanism for heat loss during exercise in a warm (~30C) environment is:Group of answer choicesconvectionevaporation of sweatradiation
If hypothalamus detect _________ temperature, it promotes heat dissipation through sweating and dilation of blood vessels in skin.Group of answer choiceshighlownonemoderate
Poor heat acclimatization and fitness levels can greatly contribute to an athlete’s heat tolerance and heat illness risk. True False
Heat acclimation leads to decreased Na+ concentration in sweat. Mechanistically, which of the following explains this adaptation?(Select all that apply, even if only one applies)Group of answer choicesAldosterone increases the number of ENaC on the apical side of the epithelial membranePlasma volume expansion as a result of heat adaptation decrease plasma Na+ concentrationAldosterone increases Na+ reabsorption in the kidneysAldosterone increases the number of Na/K-ATPase pumps on the apical side of the epithelial membrane
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