Exercise in the cold

Question 1

when cold the POAH triggers what

Answer 1

peripheral vasoconstriction, nonshivering thermogenesis, skeletal muscle shivering

Question 2

when cold the cerebral cortex triggers

Answer 2

behavioral adaptations

Question 3

cold habituation occurs after

Answer 3

repeated cold exposure without significant heat loss

Question 4

cold habituation causes

Answer 4

VC, shivering blunted, core temp can drop more

Question 5

metabolic acclimation occurs after

Answer 5

repeated cold exposure WITH heat loss

Question 6

insulative acclimation is when

Answer 6

increases metabolism cannot prevent heat loss, enhanced skin VC

Question 7

in cold environment, an increase in what two things cause an increase in insulation

Answer 7

inactive peripheral muscle, subcutaneous fat

Question 8

decrease in ___ cause a decrease in heat loss

Answer 8

body surface area

Question 9

___ is often misunderstood but can affect heat loss

Answer 9

windchill

Question 10

water has thermal conductivity ___ times greater than air

Answer 10

26

Question 11

when C+k+E+R is considered, heat loss ___ times faster in cold water versus __-

Answer 11

4, cold air

Question 12

muscle function ___ in cold

Answer 12

decreases

Question 13

what are some of the reasons why muscle function decreases in cold

Answer 13

altered fiber recruitment so low contractile force, shortened velocity and power, affects superficial muscles

Question 14

as fatigue increases, ___ decreases

Answer 14

metabolic heat production

Question 15

in the cold there is an increase in ___ but no increase in ___

Answer 15

catecholamines, FFA

Question 16

cold leads to ___ in subcutaneous fat which leads to a decrease in ___

Answer 16

vasoconstriction, FFA mobilization

Question 17

___ is well maintained during cold exposure

Answer 17

blood glucose