Thermoregulation

Question 1

lowest temp occurs during

Answer 1

sleep

Question 2

highest temps occur when

Answer 2

awake

Question 3

what coordinates temperature

Answer 3

hypothalamus

Question 4

Four
poten�al
avenues
for
heat
exchange
when exercising

Answer 4

radiation
conduction
convection
evaporation

Question 5

transfer of heat b/w objects without physical contact

Answer 5

radiation

Question 6

loss of heat through contact with another object (liquid, soil, gas)
ex] tile floors

Answer 6

conduction

Question 7

loss of heat through air or water movement across the skin

Answer 7

convection

Question 8

loss of heat by converting water (sweat) to gas

Answer 8

evaporation

Question 9

primary source of heat loss

Answer 9

evaporation

Question 10

loss of heat through respiratory tract

Answer 10

evaporation

Question 11

sweat does not cool the skin, rather..?

Answer 11

skin cooling occurs when sweat evaporates

Question 12

sweating begins several seconds after initiation of vigorous exercise

Answer 12

evaporation

Question 13

heat stress initiates these to conserve electrolytes and fluid lost in sweat

Answer 13

hormonal adjustments

Question 14

maximal cardiac output and aerobic capacity _______ durign exercise in the heat b/c the compensatory increase in HR doesnt offset the decrease stroke volume

Answer 14

decrease

Question 15

what kind of environment impedes the effectiveness of evaporative cooling and promotes large fluid losses?

Answer 15

hot, humid environments

Question 16

how much dehydration impairs physiologic function and thermoregulation?

Answer 16

any degree

Question 17

dehydration %

Answer 17

3-5% of body mass loss

Question 18

at 7% loss, what will happen

Answer 18

collapse

Question 19

loss of how much % of body mass will affect aerobic performance

Answer 19

more than 2%

Question 20

3 factors of dehydration

Answer 20

weight thirst urine

Question 21

what color should pee be

Answer 21

lemonade

Question 22

if you need a quicker recovery at the end, drink ____ oz/lb of body weight lost

Answer 22

23 oz/lb

Question 23

repeated and gradual exposure to hot environments decreases but does not eliminate the risk for heat stress

Answer 23

acclimitization

Question 24

muscle pain/spasms during activity resulting from excessive sweating, dehydration, heat

Answer 24

heat cramps

Question 25

signs and symptoms of?

muscle pains/cramps, fatigue
responds to rest, moving to cool environment, fluid/Na replenish

Answer 25

heat cramps

Question 26

drop in preload and CO due to prolonged standing, venous pooling, abrupt cessation of activity with inadequate cool down

Answer 26

heat syncope

Question 27

signs and sx of?

HR, RR slow
pale
dizziness
tunnel vision
nausea

Answer 27

heat syncope

Question 28

most common type of heat related illness

Answer 28

heat exhaustion

Question 29

body cant maintain CO

cant balance needs for CO and thermoregulation

Answer 29

heat exhaustion

Question 30

signs and sx of?

Low	
 BP/dizziness	Elevated	
 HR,	
 RR	
 
Skin	
 is	
 wet/pale	
 
HA	
 
Weakness	
 
Chills	
 
N/V	
 
Diarrhea

Answer 30

heat exhaustion

Question 31

life threatening emergency

Answer 31

heat stroke

Question 32

Caused	
 by	
 
hyperthermia	
 and	
 
involves	
 CNS	
 
dysfunc�on,	
 organ	
 
failure,	
 and	
 possiblycoma/death.	
 

Answer 32

heat stroke

Question 33

signs and sx of?

Disorienta�on	
 
Dizziness	
 
Apathy	
 
Headache	
 
Wet	
 skin	
 
N/V	
 
Hyperven�la�on	
 
Irra�onal	
 behavior

Answer 33

heat stroke

Question 34

Before exercise, drink ? atleast 4 hours before exercise.

Answer 34

.08-.11 ounces per pound

Question 35

During exercise, drink ? for every 20 minutes of exercise.

Answer 35

6-12 ounces

Question 36

sweat does not cool the skin, rather ?

Answer 36

the skin cools when sweat evaporates

Question 37

primary source of heat loss

Answer 37

evaporation

Question 38

coordinates temperature regulation

Answer 38

hypothalamus