thermoregulation

a human body tries to maintain a steady body temperature throughout life is called _____

homeothermic

conduction

the transfer of heat from human to material or material to human

example of conduction

human to chair, not bleacher to human

convection

transfer of heat from air/gas or liquid

example of convection

whirlpool to human, your body heat to cold water in the lake or ocean

explain a situation when an athlete may have radiation visible from his/her body

removal of helmet and radiation waves are seen off of head

evaporation

is the main form of heat lossfor humans during rest and exercise

body heat to chair =

conduction

warm whirlpool to human =

convection

a road heated by the sun to human =

radiation

human’s heat to the windy air =

convection

sweat to the dry, hot air =

evaporation

how does increased humidity prevent the body from decreasing body heat to regulate body temperature?

The air is already full of moisture (water) so it cannot

accept the sweat from the human. The sweat which

contains the body heat cannot evaporate

body temperature above 104 degrees can cause permanent damage to the _____

brain

the _____ tries to maintain a constant body of temperature as well as heart rate and respiration rate

hypothalmus

the skeletal muscles will ____ to increase body temperature when the body begins cooling below normal body temp

shiver

muscle cramps

involuntary muscle contraction

2 causes of muscle contraction

dehydration and electrolyte imbalance

2 signs and symptoms of heat exhaustion

pale, clammy skin, fatigued, headache, body temp. over

102 degrees, fast heart rate.

treatment of heat exhaustion

move athlete to cool temp

2 signs and symptoms of heat stroke

headache, sudden collapse, coma, hot/dry skin

treatment of heat stroke

Call 911, do not give oral fluids

What are 2 cold stressors

Wind (chill) and water

List two ways the body tries to prevent cooling

Peripheral vasoconstriction and shivering

What causes the problems that lead to frostbite in cold conditions?

The peripheral vasoconstriction of nose, ears, fingers and toes due to taking more blood to core to maintain health of internal organs