ANIMAL PHYSIOLOGY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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muscles are directed to contract rapidly (shivering) which generates heat
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rate of cellular respiration increased which generates heat
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arterioles (small arteries) leading to the skin are contracted, diverting warm blood away from the skin, thus saving heat
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hair follicles are contracted
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Detailed explanation-1: -Conversely, if the temperature falls below the set core temperature, the hypothalamus can initiate shivering to generate heat. The body uses more energy and generates more heat. In addition, thyroid hormone will stimulate more energy use and heat production by cells throughout the body.
Detailed explanation-2: -In addition, our body thermoregulates using our hair. The arrector pili muscles contract (piloerection) and lift the hair follicles upright. This makes the hairs stand on end, which acts as an insulating layer, trapping heat.
Detailed explanation-3: -Our internal body temperature is regulated by a part of our brain called the hypothalamus. The hypothalamus checks our current temperature and compares it with the normal temperature of about 37°C. If our temperature is too low, the hypothalamus makes sure that the body generates and maintains heat.
Detailed explanation-4: -When too warm: the hair erector muscle relaxes, lowering the hair. a thin insulating layer of air is trapped above the skin. more heat is lost to the environment.