Quiz on Sports Nutrition, created by Alannah McDonnell on 22/03/2018.
What energy source is predominant for activities lasting <15 secs?
What energy source is predominant for activities lasting <2 min?
What energy source is predominant for activities lasting <5 min?
As exercise intensity increases, what happens to the proportion of energy supplied by carbohydrate?
Which of these fuels can be used by muscle?
TAG from plasma lipoproteins
Plasma non-estreified FAs
Plasma ketone bodies
TAG from adipose tissue reserves
which of these will not effect the type of fuel used by muscle?
intensity of work
duration of exercise
day of the week
what type of power output will anaerobic glycolysis have?
how long can anaerobic glycolysis support muscle contraction?
up to 10 mins only
up to 1 min only
up to 5 min only
up to 30 mins only
what type of muscle fibres are mainly used with anaerobic glycolysis?
fast twitch fibres
slow twitch fibres
What type of power output does aerobic metabolism have?
how long can aerobic metabolism support muscle contraction?
up to 10 mins
up to 10 hours
for multiple days
for multiple weeks
What type of concentration is lactate accumulated in aerobic physical work?
not high concentration
What is the limit of accumulation of lactic acid in the muscle cell?
What are the classifications of doping agents?
increasing muscle mass
increasing energy use
Doping agents can be classified according to their specific effects
Extremely high hematocrit value could induce serious, deleterious consequences, including:
EPO can be tested by determining hematocrit, what is the maximum acceptable?
What are the doping substances most widely used for improving muscle mass and strength?
anabolic androgen steroids
catabolic androgen steroids
bets -2 agonists
slow the conversion of testosterone to estradiol, increasing the steady state concentration of testosterone.
slow the conversion of estradiol to testosterone, increasing the steady state concentration of estradiol
are used for treatment of asthma
improve aerobic performance
rapidly increase muscle mass and strength
What steroids are used for treatment of asthma and slightly improve the aerobic performance in the lungs of healthy individuals?
What is the most anabolic hormone in the human body?
How do some substances decrease feelings of fatigue and nervousness?
by imitating the effects of the stress hormones epinephrine and norepinephrine
by stimulating the release of epinephrine and norepinephrine
by supplying rapid energy release
Which of these decrease feelings of fatigue and nervousness?
In aerobic physical activity the metabolic fuels (carbs and lipids) a pretty completely oxidized in the citric acid cycle and electron transport system
A large percentage of the energy for aerobic physical activity comes from...
The oxidation of lipids
The reduction of lipids
The oxidation of fatty acids
The reduction of fatty acids
High concentration of blood lactate May completely replace glucose as a substrate for oxidation during very active exercise in human brain
Which of these are sources of muscle glucose for glycolytic metabolism?
Blood glucose from liver glycogen
Glucose from glycogenolysis from muscle glycogen
Blood glucose from an exogenous source
Glucogenic protein as a fuel source may be used to form
Acetyl Co A
Ketogenic protein as a fuel source may be used to form
Acetylene Co A
Acetyl co A
Muscle glycogen gives [blank_start]immediate[blank_end] energy, metabolism is done directly by [blank_start]cell[blank_end], its the [blank_start]primary energy[blank_end] for an athlete. Liver glycogen gives [blank_start]short term [blank_end]energy storage for [blank_start]muscle and brain[blank_end], metabolism is done by [blank_start]glucose phosphatase[blank_end] and stores are [blank_start]half used[blank_end] after 1 hour of intense exercise.
muscle and brain
Simple carbs have [blank_start]rapid[blank_end] absorption, rapid [blank_start]increase[blank_end] in blood glucose, [blank_start]strong[blank_end] increase in insulin and glucose is stored as glycogen and [blank_start]fat[blank_end] because [blank_start]TCA cycle[blank_end] is saturated with [blank_start]acetyl Co A[blank_end]. Complex carbs have a [blank_start]slow[blank_end] absorption and slow increase in blood glucose, they have a [blank_start]lesser[blank_end] insulin response and maximize [blank_start]glucose[blank_end] stored as [blank_start]glycogen[blank_end]. [blank_start]Complex carbs[blank_end] are preferred for athletes.