Thermoregulation (Ex phys) Exam Questions and Answers 100% Solved
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Course
Physiology
Institution
Physiology
Thermoregulation (Ex phys) Exam
Questions and Answers 100% Solved
List the means by which heat can be produced and gained by the body. -
voluntary: exercise (70-80% energy expenditure appears as heat)
involuntary: shivering, biochemical (non-shivering thermogenesis): release
of thyroxine and r...
Explain the role of temperature and humidity on sweat evaporation. -
✔✔As temperature and humidity rises, sweat production increases.
Sweat production commences as the anterior hypothalamus responds to
an increase in core temperature. (posterior hypothalamus responds to
decrease in core temperature)
Describe the role of the cutaneous blood vessels in cold or hot
temperature. - ✔✔in hot environments the blood vessels dilate to allow
for more heat loss. In cold environments the vessels constrict to keep blood
flow in the core to maintain temperature.
Describe the role of the hypothalamus and thermoreceptors in temperature
regulation. - ✔✔anterior hypothalamus- increases sweat production with
increase in core temperature. posterior hypothalamus responds to
decrease in core temperature which induces shivering and hormone
release. The input comes from the skin and core (spinal cord).
Explain the physiological response to heat load and to cold. - ✔✔In order
to cool, extra blood is shunted to skin thus reducing blood flow to muscle,
HR increase in order to maintain cardiac output. (look at picture on study
guide)
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