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HS 342 Exam 1 Questions with Correct Answers
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HS 342 Exam 1 Questions with Correct Answers
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HS 342 Exam 1 Questions with Correct Answersergometer Correct Answer ✓✓ device used in exercise to measure work
output
direct calorimetry Correct Answer ✓✓ measurement of heat production
as an indication of metabolic rate
foodstuffs + O2 --> ATP (cell work) + heat
indirect calorimetry Correct Answer ✓✓ measurement of oxygen
consumption as an estimate of resting metabolic rate
open circuit spirometry Correct Answer ✓✓ determines VO2 by
measuring amount of O2 consumed
speed and power Correct Answer ✓✓ the energy cost of horizontal
treadmill walking or running and cycling can be estimated with
reasonable accuracy because the O2 requirements increase as a linear
function of _____________ and ______________, respectively.
1. resting VO2
2. VO2 for unloaded cycling
3. VO2 of cycling against external load Correct Answer ✓✓ what three
components comprise the estimation of the O2 requirement of cycling?
,net efficiency Correct Answer ✓✓ ratio of work output divided by
energy expended above rest
net efficiency will be Correct Answer ✓✓ which will be lower, net
efficiency or gross efficiency?
15-27% Correct Answer ✓✓ what is the range of net efficiency of cycle
ergometry?
a curvilinear relationship (you expend more energy at these higher work
rates Correct Answer ✓✓ what kind of relationship is between work rate
and energy expenditure?
work rate Correct Answer ✓✓ efficiency decreases with increasing
________ _______
speed of movement Correct Answer ✓✓ there is an optimum speed of
movement and any deviation reduces efficiency
slow twitch muscle fibers Correct Answer ✓✓ do slow twitch or fast
twitch muscle fibers have higher efficiency?
running economy Correct Answer ✓✓ -oxygen cost of running at given
speed
-lower VO2 at same speed indicates better running economy
, Homeostasis Correct Answer ✓✓ a condition of equilibrium (balance)
in the body's internal environment
-maintenance of a constant and 'normal' internal environment
-it is a dynamic condition meant to keep body functions in the narrow
range compatible with maintaining life.
steady state Correct Answer ✓✓ physiological variable is unchanging,
but not necessarily "normal"
-balance between demands placed on body and the body's response to
those demands
98.6 degrees F Correct Answer ✓✓ 37 degrees C
reaches a plateau Correct Answer ✓✓ during exercise, body
temperature ____________ __________ _______________
mean pressure remains constant Correct Answer ✓✓ although arterial
pressure oscillates over time,
1. intracellular control systems
2. organ systems Correct Answer ✓✓ what are the two types of control
systems in the body?
intracellular control systems Correct Answer ✓✓ -protein breakdown
and synthesis
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