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Ex Phys Exam 3

QuestionAnswer
Humans, as well as most mammals are characterized as.... homeotherms
Homeotherms internal body temperature is driven primarily by metabolism
You are exercising on a sunny day where the ambient temperature is 74 F, what is the primary means by which you may increase core temp? metabolism
The method for measuring all aspects of thermal balance, developed for the US marines, which derives a single effective temp is referred to as wet bulb thermometer
What four specific aspects of the environment are measured by the WBGT? radiation, convection, evaporation, and ambient temperature
Common to much of the US is the effect we refer to as windchill, which can provide a "feels like" temp far less than the air temp. This common phenomenon is due to heat loss through... convection
the body's heating and cooling mechanisms are activated by the hypothalamus
during heavy exercise in a hot environment, there is competition for blood supply between the.... skin and muscle
upon acute exposure to exercise in a hyperthermic environment that power output declined, this is referred to as... fatigue
What increases during submaximal exercise upon acute exposure to a hyperthermic environment heart rate, cardiac output, blood lactate
the single most important adaptation that occurs following chronic exposure to exercise in a warm environment is an increase in plasma volume
According to ____________________, PO2 decreases as a function of increasing altitude, due to the decrease in barometric pressure Dalton's Law
According to Dalton's Law, _______ decreases as a function of increasing altitude, due to the decrease in __________ PO2, barometric pressure
upon acute exposure to altitude the lung responds quite dramatically; there is an increase in..... Ve, TV, breathing frequency, Hb binding
Upon acute exposure to altitude, the lung responds quite dramatically in an attempt to increase P^O2
The single most important adaptation that occurs following weeks of altitude exposure is an increase in.... red blood cells
describe in one sentence running at the same absolute speed at 7mph, at sea level and upon acute exposure to altitude running at 7mph is a greater relative percent of VO2max upon acute altitude exposure
in sporting events where performance can be compared, world class mall athletes generally perform better than world-class female athletes by approximately 10%
why do men perform better than women? increased body fat/weight penalty, lower red blood volume, smaller cardiac output
a woman's increase in muscle mass with resistance training is generally __________ than seen in men smaller than
the primary cause of secondary amenorrhea in female athletes appears to be a prolonged energy defecit
true or false: women experience the same relative increase in maximal oxygen uptake as do men with cardiorespiratory endurance training true
true or false:the "romance period" of the marathon can be seen for men, but not for women false
true or false: the globalization of the marathon resulted in increased diversity of athlete's participating true
the primary means to, for humans, to increase core body temp is... metabolism
the primary means for humans to lose body heat at rest is radiation
the primary means for humans to lose heat during exercise is.. evaporation
the primary means for humans to gain heat during exercise is ____________ metabolism
What variable of interest is elevated when humans are exposed to a hyperthermic environment heart rate
true or false: humans adapt to hypothermic environment false
true or false: cycling at 150W; there is no effect of acute heat exposure on cardiac output false
the radiator fluid in humans blood
the primary limiting factor during exercise in a hyperthermic environment is blood volume
the most important adaptation following repeated exposure to a warm environment is an increase in plasma volume
name two specific organs that are involved in repeated exposure to a warm environment kidneys and liver
following an adaptation to a hyperthermic environment we sweat sooner; sooner in terms of what? rise in core temperature
what specific organ has been reset when we sweat sooner? hypothalamus
as altitude increases ________ decreases PO2; barometric pressure
when PO2/barometric pressure decreases, _________ decreases VO2max; PO2
true or false: upon acute exposure to altitude, Q is increased true
true or false: upon acute exposure to altitude, maximal Q is increased false
true or false: upon acute exposure to altitude, blood lactate is increased true
true or false: upon acute exposure to altitude, Ve is increased true
what is the primary limiting factor during exercise in a hypobaric/hypoxic environment? oxygen
the most important adaptation following repeated exposure to a hypobaric/hypoxic is an increase in red blood cells
the hormone that stimulates the change in red blood cells is Epo
Epo is secreted by the kidney
an organism whose internal temperature varies considerably poikilotherms
Created by: elyk01