home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
ftptest.leeds.ac.uk
/
2015.02.ftptest.leeds.ac.uk.tar
/
ftptest.leeds.ac.uk
/
bionet
/
mcq_etc
/
phys_mcq.exe
/
ENERGY.MCQ
< prev
next >
Wrap
Text File
|
1993-08-06
|
3KB
|
78 lines
D:Created 14.46 06/08/1993
D:Subject : Physiology
D:Topic : Energy metabolism
D:Level : Moderate
D:
D:Authors : Department of Physiology
D: The University
D: Leeds LS2 9NQ
I:MCQ SB 1
G:3
G:1:Dental Students
Q:1,2
G:2:Medical Students
Q:1,2
G:3:Science Students
Q:1,2
T:A
L:2
#:1
G: 1 2 3
S:1
:Energy expenditure:
B:N:5
B:1:T:1
:is proportional to body mass (under basal conditions)
B:2:T:1
:can be determined by the Douglas bag technique
B:3:F:1
:equals heat production during exercise
B:4:T:1
:is increased during shivering
B:5:T:2
:would be increased in an individual breathing 8% CO2 in air compared to
:breathing normal room air provided all other conditions remained identical
F:10
:Energy expenditure (metabolic rate) is a measure of the total of the
:(mainly oxidative) chemical reactions occurring in the body and any
:physical work (exercise) done on the environment. The amount of these
:processes may be estimated indirectly by measuring oxygen consumption and
:the Douglas bag technique is commonly employed for this in studies on man.
: There will be more chemical reactions in larger compared to smaller
:persons, during contraction of skeletal muscle in shivering and in
:hyperventilation, and energy expenditure will therefore be increased.
:During exercise energy expenditure represents the sum of the physical work
:done and the heat liberated by the chemical reactions.
E:------
#:2
G: 1 2 3
S:1
:Basal metabolic rate:
B:N:5
B:1:F:2
:Is approximately the same in adult males and females of similar age
:when calculated on a unit surface area basis
B:2:T:1
:decreases in magnitude with increasing age if corrected for body size
B:3:F:1
:should be measured within 6 hours of eating a meal
B:4:T:1
:is about 80 W in an adult man
B:5:T:1
:can be assessed by assaying T3 and T4.
F:12
:Attempts made to normalise basal metabolic rate (BMR) in terms of body
:mass, to relate heat production to body size, or surface area, to relate
:to heat loss, have not been entirely successful. Although men and women
:of similar mass have similar BMRs, women have lower BMRs than men of
:similar surface areas which may be related to the greater subcutaneous fat
:thicknesses in women. Other things being equal BMR decreases with age.
:The BMR should be measured in a fasting state so that the metabolic
:effects of digestion are not included. Its value in an adult man is
:about that of a moderately powered light bulb (80 W). The BMR was
:formerly measured to assess the function of the thyroid gland. Nowadays
:thyroid hormone concentrations are measured directly in the blood from
:which the metabolic rate may be inferred.
E:------
::