EXSS 376 FINAL EXAM QUESTIONS WITH
ANSWERS 100% PASS
Four mechanism of how we lose heat? - ANSWER 1) radiation
2) conduction
3) convection
4) evaporation
Mechanisms of how we gain heat? - ANSWER 1) Basal metabolic rate
2) hormones
3) muscular activity
4) postural changes
Heat conservation occurs when blood shunts rapidly to ____________________________ and
muscle mass - ANSWER deep body cavities
Increases in internal heat ________________ as warm blood flows to the cooler periphery -
ANSWER Dilate peripheral vessels, in order to have more blood flow to carry to skin in
order to go through evaporative processes to go through that way.
What does hypothalamus regulate for body? - ANSWER Contains coordinating center for
temperature regulation/acts as a thermostat to keep body at 37 C
,What follows when have a small rise in core temperature? - ANSWER Allows to manage
core temperature due to optimize physiologic/metabolic functions
*Respiratory system, if have a change in temp then have a better unloading of oxygen to
tissues.
Physical activity at ______________ increases core temp to steady level of 99 F - ANSWER
50% VO2max, if go to 75% VO2max temp goes to 101F
Does a trained or untrained person have higher core temperature during physical activity
at same relative intensity? - ANSWER Neither, have similar core temperatures. Can seem
contradictory due to trained person activating more muscle tissue, activating more
metabolic pathways that should raise their temperature more. But extra metabolic heat
for trained person dissipates via a larger sweat output
As ____________ increases, and ____________ increases see an increase in core temperature.
See a similar response in males and females for core temperature. - ANSWER power
output/oxygen
Main cardiovascular response to the cold? - ANSWER Shunting of blood. Experience
shivering, through somatic system. The blood that is actually going through the
hypothalamus.
Thryoid hormone is something that releases thyroxine... - ANSWER which is going to
increase our resting metabolic rate (helps produce heat). Will not come into to play
unless exposed to cold for longs period of time.
, What are some physiological responses when exercising in the cold? - ANSWER 1)
decrease muscle function
2) Recruitment pattern use to is altered, potential to decrease contractile
force/shortening velocity and power
3) deep muscles not really affected
4) fatigue going to slow down/slow down metabolic processes take part in leads to
generating less heat.
When exercising in the cold, use more of FFA or glucose? - ANSWER Do not use much of
FFA in a cold condition, but in terms of glucose metabolism going to use more of muscle
glycogen (to combat the amount of FFA able to use)
Differences in body fat influence physiologic function in cold during rest/exercise how? -
ANSWER 1) Subcutaneous fat will act as an insulator, act as a way to block some of the
hit that is escaping
2) Individuals that have small body surface area to mass ratio will not have much heat
loss
Radiation - ANSWER Energy that is radiated or transmitted in the form of rays or waves
or particles (gain by sun, lose if body warmer than external environment)
conduction - ANSWER loss or gain of heat by transfer of thermal energy during collision
between adjunct molecules (contact w/warmer or cooler surface)
ANSWERS 100% PASS
Four mechanism of how we lose heat? - ANSWER 1) radiation
2) conduction
3) convection
4) evaporation
Mechanisms of how we gain heat? - ANSWER 1) Basal metabolic rate
2) hormones
3) muscular activity
4) postural changes
Heat conservation occurs when blood shunts rapidly to ____________________________ and
muscle mass - ANSWER deep body cavities
Increases in internal heat ________________ as warm blood flows to the cooler periphery -
ANSWER Dilate peripheral vessels, in order to have more blood flow to carry to skin in
order to go through evaporative processes to go through that way.
What does hypothalamus regulate for body? - ANSWER Contains coordinating center for
temperature regulation/acts as a thermostat to keep body at 37 C
,What follows when have a small rise in core temperature? - ANSWER Allows to manage
core temperature due to optimize physiologic/metabolic functions
*Respiratory system, if have a change in temp then have a better unloading of oxygen to
tissues.
Physical activity at ______________ increases core temp to steady level of 99 F - ANSWER
50% VO2max, if go to 75% VO2max temp goes to 101F
Does a trained or untrained person have higher core temperature during physical activity
at same relative intensity? - ANSWER Neither, have similar core temperatures. Can seem
contradictory due to trained person activating more muscle tissue, activating more
metabolic pathways that should raise their temperature more. But extra metabolic heat
for trained person dissipates via a larger sweat output
As ____________ increases, and ____________ increases see an increase in core temperature.
See a similar response in males and females for core temperature. - ANSWER power
output/oxygen
Main cardiovascular response to the cold? - ANSWER Shunting of blood. Experience
shivering, through somatic system. The blood that is actually going through the
hypothalamus.
Thryoid hormone is something that releases thyroxine... - ANSWER which is going to
increase our resting metabolic rate (helps produce heat). Will not come into to play
unless exposed to cold for longs period of time.
, What are some physiological responses when exercising in the cold? - ANSWER 1)
decrease muscle function
2) Recruitment pattern use to is altered, potential to decrease contractile
force/shortening velocity and power
3) deep muscles not really affected
4) fatigue going to slow down/slow down metabolic processes take part in leads to
generating less heat.
When exercising in the cold, use more of FFA or glucose? - ANSWER Do not use much of
FFA in a cold condition, but in terms of glucose metabolism going to use more of muscle
glycogen (to combat the amount of FFA able to use)
Differences in body fat influence physiologic function in cold during rest/exercise how? -
ANSWER 1) Subcutaneous fat will act as an insulator, act as a way to block some of the
hit that is escaping
2) Individuals that have small body surface area to mass ratio will not have much heat
loss
Radiation - ANSWER Energy that is radiated or transmitted in the form of rays or waves
or particles (gain by sun, lose if body warmer than external environment)
conduction - ANSWER loss or gain of heat by transfer of thermal energy during collision
between adjunct molecules (contact w/warmer or cooler surface)
