Thermoregulation Flashcards
Core temperature is easily affected by external environment. T/F
False
Core temperature is always lesser than oral or rectal temperature. T/F
False . Core temperature is always more than oral or rectal temperature
During 24 hour circadian rhythm, body temperature varies by _______
Approximately 0.8°C. Lowest between 3-6am
Highest between 4-6 pm
In children body temperature is _____than adults.
More than . Due to higher physical activity.
Females have a ______ temperature than males due to lesser BMR.
Lesser .
In smaller animals body heat is _____than larger animals.
More.
For the same amount of biomolecule, give the order of heat of metabolism for -
Fat, Protein, carbohydrates.
Fat> carbohydrates> Protein
Which body organ produces maximum metabolic heat?
Liver
Which hormones are known to accelerate body heat due to increase in metabolism?
Thyroxine and adrenaline
Heat dissipation can occur through which body organs?
What are ways in which heat can be lost through skin?
________is the process of insensible water loss from skin .
Perspiration depends on external environment whereas sweating is independent of external environment. T/F
With respect to pulmonary heat loss , how much heat is lost in expired air ?
Panting is a form of pulmonary heat loss. T/F
Panting is uncommon in humans but widely seen in ?
Behavioral thermoregulation is by changing internal/external conditions ….whereas physiological thermoregulation is by changing internal/external conditions
Body temperature is regulated by which part of the brain?
Which nuclei of hypothalamus specifically function in heat loss and heat gain?
Heat loss is controlled by _______part of preoptic area whereas heat gain is controlled by _________part of preoptic area
Removal of anterior preoptic area will result in?
Removal of posterior preoptic area will result in?
Thermoreceptors are mainly found in____________&____________.
How many types of cutaneous thermoreceptors are found in humans?
Warm receptors account for only 10% of cutaneous thermoreceptors whereas cold thermoreceptors account for *“90%** of cutaneous thermoreceptors. T/F .
What is the working temperature range of warm and cold thermoreceptors?
Cutaneous thermoreceptors are central thermoreceptors whereas hypothalamic thermoreceptors are peripheral thermoreceptors.T/F .
When the body temperature rises, how does the heat loss centre restore the normal temperature?
When the body temperature falls, how does the heat gain centre restore the normal temperature?
Sympathetic activity helps to lower/increase body temp.
Acclimatization is a change at ____level whereas adaptation is a change at _____level .
Heat acclimatization
Heat acclimatization is greater when an individual has combined chronic exposure to heat and exercise. T/F
What are the 3 physiological changes in which heat acclimatization responds ?
What are the 2 physiological changes in which cold acclimatization responds ?
What is Lewis -hunting response?
What are the metabolic changes that occur in response to severe cold?
Lewis-hunting response is seen on repeated exposure to hot environment. T/F
Which are 4 effector organs involved in thermoregulation ?
When the temperature outside is higher then the core temperature threshold for sweating is increased/reduced/same ?
