NUTR 3000 EXAM QUESTIONS AND ACCURATE
ANSWERS 100% VERIFIED
What is the primary role of CHO in the body? - ANSWER Provide energy (Is the preferred
fuel source of CNS and supports high intensity exercise)
What is the primary fuel of muscles? - ANSWER Glycogen
Where is glycogen stored? - ANSWER In muscles and liver
What % VO2 max is glycogen critical for fuelling? - ANSWER >50% = high intensity
What fuel is preferentially used for low intensity exercise? - ANSWER fat
What does 'hitting the wall' refer to? - ANSWER running out of glycogen in the muscles
responsible for exercise
What happens when you 'hit the wall'? - ANSWER Muscles can still work, but they must
then rely on fat, which can only be burnt in the presence of oxygen
After hitting the wall - the muscles lose their capacity to exercise at a high intensity,
pace cuts by half
What are some of the characteristics of hypoglycaemia? - ANSWER characteristics: lack
of concentration, motivation, tiredness and fatigue, dizziness
Athletes - fatigue, feels effort of exercise much more etc.
(as brain isn't receiving enough glucose to function properly)
, How does the body react to hypoglycaemia? - ANSWER Endocrine system will release
hormones
How is glycogen used in different intensities of exercise? - ANSWER The higher the
intensity of exercise, the more glycogen is used.
Where is glycogen derived from? - ANSWER Dietary carbohydrates
What is the effect of having more glycogen stored in muscles? - ANSWER more work
that you can complete (and delay onset of fatigue)
Why might you feel heavier after carb loading? - ANSWER 2.6mL of water is stored with
each gram of glycogen
Higher oxidation rates with glucose and sucrose compared to glucose along (T/F)? -
ANSWER T
Why is more CHO absorbed when ingested as glucose and sucrose? - ANSWER
DIfferent carriers - SGLT1 and GLUT5
What is the limitation to using exogenous CHO during exercise? - ANSWER Rate of
absorption - transporters become saturated
How does CHO ingestion during exercise improve performance? - ANSWER Prevents
hypoglycaemia (keep cognitive function - motivation etc.)
May spare muscle glycogen in type 1 fibres (very rarely)
Which cells can only use glucose as a fuel and why? - ANSWER brain, retina, RBC
Cells don't have mitochondria, so can't metabolise fat
ANSWERS 100% VERIFIED
What is the primary role of CHO in the body? - ANSWER Provide energy (Is the preferred
fuel source of CNS and supports high intensity exercise)
What is the primary fuel of muscles? - ANSWER Glycogen
Where is glycogen stored? - ANSWER In muscles and liver
What % VO2 max is glycogen critical for fuelling? - ANSWER >50% = high intensity
What fuel is preferentially used for low intensity exercise? - ANSWER fat
What does 'hitting the wall' refer to? - ANSWER running out of glycogen in the muscles
responsible for exercise
What happens when you 'hit the wall'? - ANSWER Muscles can still work, but they must
then rely on fat, which can only be burnt in the presence of oxygen
After hitting the wall - the muscles lose their capacity to exercise at a high intensity,
pace cuts by half
What are some of the characteristics of hypoglycaemia? - ANSWER characteristics: lack
of concentration, motivation, tiredness and fatigue, dizziness
Athletes - fatigue, feels effort of exercise much more etc.
(as brain isn't receiving enough glucose to function properly)
, How does the body react to hypoglycaemia? - ANSWER Endocrine system will release
hormones
How is glycogen used in different intensities of exercise? - ANSWER The higher the
intensity of exercise, the more glycogen is used.
Where is glycogen derived from? - ANSWER Dietary carbohydrates
What is the effect of having more glycogen stored in muscles? - ANSWER more work
that you can complete (and delay onset of fatigue)
Why might you feel heavier after carb loading? - ANSWER 2.6mL of water is stored with
each gram of glycogen
Higher oxidation rates with glucose and sucrose compared to glucose along (T/F)? -
ANSWER T
Why is more CHO absorbed when ingested as glucose and sucrose? - ANSWER
DIfferent carriers - SGLT1 and GLUT5
What is the limitation to using exogenous CHO during exercise? - ANSWER Rate of
absorption - transporters become saturated
How does CHO ingestion during exercise improve performance? - ANSWER Prevents
hypoglycaemia (keep cognitive function - motivation etc.)
May spare muscle glycogen in type 1 fibres (very rarely)
Which cells can only use glucose as a fuel and why? - ANSWER brain, retina, RBC
Cells don't have mitochondria, so can't metabolise fat
