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Physiology > week 8 > Flashcards

week 8 Flashcards

1
Q

whats the core temp

A

36.5-37.5

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2
Q

core temp definition

A

temp of blood in hypothalamus in the thermoregulatory center of the body

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3
Q

ways to check temp thats not oral

A

tympanic, esophagus and rectal, stomach - telemetry pill

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4
Q

what is the skin temp

A

32 - 35

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5
Q

what monitors the body’s temp

A

thermoreceptors

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6
Q

what do efferent control do for the bodys temp

A

blood vessels dilation, glands, shivering - for too hot or too cold

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7
Q

voluntary muscular activity example for being too cold

A

shivering

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8
Q

what is thermogenesis?

A

the production of heat within animal or human body

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9
Q

thermogenesis is used for what

A

heat balance/ regulation

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10
Q

biophysical properties effect heat loss - name examples

A

convection, conduction, - water, air, wet or dry atmosphere

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11
Q

why don’t people sweat in humid climates

A

water cant leave the skin into the air due to high humidity levels

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12
Q

clothing effects heat loss - true or false

A

true

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13
Q

core temp needs to what

A

stay within a limited range

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14
Q

where does heat lose come from mostly

A

shell / skin

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15
Q

skin temp is regulated true or false

A

false

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16
Q

what is the most powerful response for helping control body temp

A

behavioral

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17
Q

what performance is impacted in hot and humid conditions

A

aerobic

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18
Q

what is increased in demand in hot environments

A

heat loss mechanisms- sweating, blood flow

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19
Q

in hot environment - what is reduced

A

the gradient between core and skin

20
Q

in heat - dehydration is a problem due to fluid loss - true or false

A

true

21
Q

heat causes a decrease in sweat rate and plasma volume because of

A

dehydration

22
Q

cardiac output, maximal o2 uptake and muscle strength decreases or increases during heat

A

decreases

23
Q

work capacity during heat is

A

decreased

24
Q

hiie is impacted by heat because…

A

Blood flow is compromised due to muscle and thermoregulation between muscle and skin

25
Q

heat related changes in skeletal muscle function and metabolism causes

A

hiie to be impaired

26
Q

impacts of the heat on you - warning signs

A

thrist, lots of sweating, fatigue, headache, nausea, chills or goosebumps, faitness

27
Q

heat illness signs

A

heat cramps, heat exhuastion, heat stroke, confusion, hot and dry skin, rapid pulse.

28
Q

how should athletes prepare for training in heat

A

train in heat - aerobic specifically and immediately post - pre-cooling - improving hydration status

29
Q

examples of acclimatization’s…(8)

A

improved blood flow, lower threshold for sweating, more effective distribution of sweat, less salt conc of sweat, lower skin core temps , less reliance on cho catabolism

30
Q

the effect of blood flow on body

A

transports heat from deep tissue

31
Q

the effect of more effective cardiac output

A

circulation to skin and muscles to meet demands and better bp stability during exercise

32
Q

effect of lower sweat threshold

A

evaporative cooling

33
Q

effect lower salt in sweat

A

preserving electrolytes

34
Q

effects of lower core and skin temo and hr

A

allows for blood flow to muscles

35
Q

effects of less reliance on cho

A

spare cho

36
Q

cold stress is what temp for the core

A

below 35 or 95 F

37
Q

2 degree drop in cold will cause what

A

associated with maximal shivering

38
Q

4 degree drop in core temp will cause what

A

ataxia and apathy

39
Q

6 temp core drop will cause

A

unconscious

40
Q

what occurs over 6 degree drop in temp

A

ventricular fib, reduced brain flow, asystole and death

41
Q

responses to cold during exercise - physiological - not shivering and blood flow

A

increased submaximal vo2 and capacity in water - due to heat loss, increased lactate, lower hr, release of leptin from adipose, lower lipid mobilisation,

42
Q

cold - why is there a lower lipid mobilization

A

reduced blood to adipocytes

43
Q

what causes decreased hr during submaximal exercise in cold

A

increased central blood volume for heating core

44
Q

why increased blood volume in the core in cold

A

peripheral vascocontriction

45
Q

why the release of leptin during cold from adipose

A

increased sympathetic stimulation

46
Q

effects of increased lactate concentration

A

due to increased cho metabolism

47
Q

exercise in cold environment results in what

A

shivering threshold is lowred due to heat production and improved peripheral blood flow to hands and feet and sleep in cold

Physiology (18 decks)

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