Thermoregulation

Question 1

Core temperature is easily affected by external environment. T/F

Answer 1

False

Question 2

Core temperature is always lesser than oral or rectal temperature. T/F

Answer 2

False . Core temperature is always more than oral or rectal temperature

Question 3

During 24 hour circadian rhythm, body temperature varies by _______

Answer 3

Approximately 0.8°C. Lowest between 3-6am

Highest between 4-6 pm

Question 4

In children body temperature is _____than adults.

Answer 4

More than . Due to higher physical activity.

Question 5

Females have a ______ temperature than males due to lesser BMR.

Answer 5

Lesser .

Question 6

In smaller animals body heat is _____than larger animals.

Answer 6

More.

Question 7

For the same amount of biomolecule, give the order of heat of metabolism for -

Fat, Protein, carbohydrates.

Answer 7

Fat> carbohydrates> Protein

Question 8

Which body organ produces maximum metabolic heat?

Answer 8

Liver

Question 9

Which hormones are known to accelerate body heat due to increase in metabolism?

Answer 9

Thyroxine and adrenaline

Question 10

Heat dissipation can occur through which body organs?

Question 11

What are ways in which heat can be lost through skin?

Question 12

________is the process of insensible water loss from skin .

Question 13

Perspiration depends on external environment whereas sweating is independent of external environment. T/F

Question 14

With respect to pulmonary heat loss , how much heat is lost in expired air ?

Question 15

Panting is a form of pulmonary heat loss. T/F

Question 16

Panting is uncommon in humans but widely seen in ?

Question 17

Behavioral thermoregulation is by changing internal/external conditions ….whereas physiological thermoregulation is by changing internal/external conditions

Question 18

Body temperature is regulated by which part of the brain?

Question 19

Which nuclei of hypothalamus specifically function in heat loss and heat gain?

Question 20

Heat loss is controlled by _______part of preoptic area whereas heat gain is controlled by _________part of preoptic area

Question 21

Removal of anterior preoptic area will result in?

Question 22

Removal of posterior preoptic area will result in?

Question 23

Thermoreceptors are mainly found in____________&____________.

Question 24

How many types of cutaneous thermoreceptors are found in humans?

Question 25

Warm receptors account for only 10% of cutaneous thermoreceptors whereas cold thermoreceptors account for *“90%** of cutaneous thermoreceptors. T/F .

Question 26

What is the working temperature range of warm and cold thermoreceptors?

Question 27

Cutaneous thermoreceptors are central thermoreceptors whereas hypothalamic thermoreceptors are peripheral thermoreceptors.T/F .

Question 28

When the body temperature rises, how does the heat loss centre restore the normal temperature?

Question 29

When the body temperature falls, how does the heat gain centre restore the normal temperature?

Question 30

Sympathetic activity helps to lower/increase body temp.

Question 31

Acclimatization is a change at ____level whereas adaptation is a change at _____level .

Question 32

Heat acclimatization

Question 33

Heat acclimatization is greater when an individual has combined chronic exposure to heat and exercise. T/F

Question 34

What are the 3 physiological changes in which heat acclimatization responds ?

Question 35

What are the 2 physiological changes in which cold acclimatization responds ?

Question 36

What is Lewis -hunting response?

Question 37

What are the metabolic changes that occur in response to severe cold?

Question 38

Lewis-hunting response is seen on repeated exposure to hot environment. T/F

Question 39

Which are 4 effector organs involved in thermoregulation ?

Question 40

When the temperature outside is higher then the core temperature threshold for sweating is increased/reduced/same ?