ch 24 Flashcards
A major means for conserving heat is __________.
a)vasodilation of cutaneous blood vessels
c)increased convective loss
d)increased metabolic rate
e)vasoconstriction of cutaneous blood vessels
In glycolysis, glucose must be activated with the use of how many ATP
Most vitamins __________.
a)function as coenzymes in the body
c)are used as building blocks for the body
d)are metabolized to make ATP
One function of vitamin A is to __________.
a)form visual pigments
b)assist in blood clotting
c)transfer electrons in cellular respiration
d)help with calcium absorption
e)make DNA synthesis possible
The hormone responsible for setting the basal metabolic rate is
The site of electron transport is the __________.
c)mitochondrial inner membrane (cristae)
e)mitochondrial outer membrane
The thermoregulatory center is located in the __________.
Which coenzyme is reduced in both glycolysis and the Krebs
Which element below is considered a trace mineral?
Which lipoprotein contains high levels of cholesterol?
Nutritionally incomplete proteins are low in __________.
a)one or more of the essential fatty acids
b)one or more of the essential amino acids
c)one or more of the coenzymes
d)actin and myosin
e)one or more of the major vitamins
Most of the ATP produced during cellular respiration is produced by
a)the Krebs cycle
b)oxidative phosphorylation during the chemiosmotic process
A function of the liver during the postabsorptive state is
a)electron transport to release glucose
d)to store excess glucose by glycogenesis
e)to mobilize glucose reserves by glycogenolysis
The hormone that controls essentially all events of the absorptive state is __________.
Which of the following factors makes it harder for an obese person to
a)an increase in taste receptors
b)an increase in metabolism that increases appetite
c)an increase in thyroxine levels as fat levels accumulate
d)an increase in heat loss from the body that requires more food intake
e)an increase in alpha receptors (the kind that favors fat accumulation) in fat cells
Which of the following is the amount of energy the body needs to
Which of the following is a physiological response to
a)increasing physical activity
b)covering up with a blanket
d)drinking warm fluids
A kilocalorie is the amount of energy __________.
a)needed to heat 1 kilogram of water 1 degree Fahrenheit
b)locked up in 1 kilogram of water
c)needed to heat 1 kilogram of water 1 degree Celsius
d)needed to move 1 kilogram of water 1 meter
Essential nutrients refer to nutrients that are __________.
a)essential for the human body to function
b)synthesized every day in the body
c)obtained from an outside source because the body cannot make them fast enough to meet the body's needs, so our diet must provide them
d)stored in the body for times of starvation
Prolonged high protein intake can lead to __________.
b)loss of bone mass
d)a negative nitrogen balance
Which of the following substances is considered a provitamin?
Which of the following fat-soluble vitamins is NOT stored in the
The final product of glycolysis is __________.
a)the formation of four ATP molecules
b)the production of acetyl coenzyme A
c)two molecules of pyruvic acid, two molecules of NAD+, and a net gain of two ATP
Cyanide acts as a poison by __________.
b)abolishing the proton gradient by making the cristae membrane permeable to H+
c)irreversibly binding to oxygen
d)interfering with the flow of electrons in the electron transport chain
During fasts lasting several weeks, blood glucose is maintained by
A low-density lipoprotein would contain __________.
a)a low cholesterol content
b)a high lipid content
c)a high protein content
d)a low lipid content
The role of __________ is to transport excessive cholesterol from
peripheral tissue to the liver, where it is broken down and becomes
part of bile.
d)very low density lipoproteins
The official medical measurement of obesity is the __________.
a)proportion of LDLs to body weight
b)basal metabolic rate
c)body mass index
d)proportion of bone density to weight
__________ acts to suppress appetite by inhibiting __________, which
is the most-powerful known appetite stimulant.
b)Growth hormone; lipase
d)Leptin; neuropeptide Y
Which of the following statements about "redox" reactions
in human metabolism is correct?
a)Oxidized substances gain energy.
b)Enzymes accept hydrogen.
c)The substance being reduced loses an electron.
d)Coenzymes accept hydrogen.