PHYSIOLOGY OF EXERCISE EXAM | QUESTION
AND ANSWER | VERIFIED QUESTION AND
ANSWER |GRADED A+ | LATEST EXAM 2025/2026
Which molecule has the highest potential energy?
Glucose
Which is the correct sequence in the response of a homeostatic system to a perturbation?
Stimulus, senor, control center, effector
Which system describes a positive feedback system?
Labor/child birth/oxytocin
Which of the following is an adaptation or change in the body's homeostatic
set-point?
Increased storage of glucose in the muscles after 8 weeks of exercise training
The synthesis of heat shock proteins by a cell to repair damaged cellular components is an
example of:
an adaptation to restore homeostasis
Coupled reactions are defined as:
reactions that are linked together, with the liberation of free energy in one reaction being used
to drive the second reaction
Enzymes are catalysts that increase the rate of reactions by:
lowering the energy of activation
What are the two most important hydrogen (electron) carriers in bioenergetic chemical
reactions?
NAD & FAD
Which would speed up the rate of a chemical reaction in the muscles?
Warming it up.
Which of the following is an exergonic reaction?
,breakdown of ATP to ADP
Which is not considered biologic work in humans?
Heat Production
What enzyme catalyzes the most immediately available energy system in your body?
Creatine Phosphate
The process of beta-oxidation involves
the breakdown of a fatty acid to acetyl-CoA
In general, the higher the intensity of the activity, the greater the contribution of:
anaerobic energy production
Aerobic production of ATP occurs in the:
in the mitochondria in a process called oxidative phosphorylation
The primary function of the Krebs cycle is to:
complete the oxidation of carbohydrates, fats, and proteins (i.e. form NADH and FADH
Your body needs oxygen to fully breakdown macronutrients to make ATP. How is oxygen used
during the process?
As an electron acceptor in the electron transport chain.
The simplest and most rapid method of producing ATP during exercise is through:
The creatine phosphate system
Fats that are stored in muscle and adipose tissue that play an important role as an energy
substrate are:
Triglycerides
At rest, the O2 concumption of a 70-kg young adult is approximately
3.5 ml/kg/min
A major rate limiting step that prevents the marathon world record average
speed from being close to the 100 m dash world record average speed is
the transfer of pyruvate from the cytosol to the mitochondria
The term oxygen deficit refers to the:
, lag in oxygen consumption at the beginning of exercise
Energy to run a maximal 400-meter race (50 to 60 seconds) comes from:
a combination of aerobic/anaerobic metabolism, with most of the ATP coming from anaerobic
sources.
Energy to run a 40-yard dash comes (<6 seconds) comes from
the creatine phosphate system
The energy to perform long-term exercise (>20 minutes) comes primarily from:
the creatine-phosphate system initially, but then mostly aerobic metabolism
Which of the following is true about VO2 during exercise?
- VO2 increases linearly with work rate
-VO2 is an indicator of aerobic ATP production
-VO2 plateaus prior to fatigue during a max test
Lactate is formed and accumulates when the rate of glycolytic production of
pyruvate and NADH exceeds the rate at which these products are shuttled
into the mitochondria.
True
After the first few minutes of constant-load, submaximal exercise, VO2 reaches steady state,
indicating that
the ATP demand is being met aerobically
What is the ultimate fate of the 6 carbons that composed a glucose molecule
after it's broken down to make ATP to fuel muscle contractions?
Exhaled as a waste product
What causes an increase in blood lactate?
high rate of glycolysis
What is the primary source of ATP production in the early stages (5-10
minutes into a 60 minute session) of high intensity STEADY-STATE exercise?
muscle glycogen
AND ANSWER | VERIFIED QUESTION AND
ANSWER |GRADED A+ | LATEST EXAM 2025/2026
Which molecule has the highest potential energy?
Glucose
Which is the correct sequence in the response of a homeostatic system to a perturbation?
Stimulus, senor, control center, effector
Which system describes a positive feedback system?
Labor/child birth/oxytocin
Which of the following is an adaptation or change in the body's homeostatic
set-point?
Increased storage of glucose in the muscles after 8 weeks of exercise training
The synthesis of heat shock proteins by a cell to repair damaged cellular components is an
example of:
an adaptation to restore homeostasis
Coupled reactions are defined as:
reactions that are linked together, with the liberation of free energy in one reaction being used
to drive the second reaction
Enzymes are catalysts that increase the rate of reactions by:
lowering the energy of activation
What are the two most important hydrogen (electron) carriers in bioenergetic chemical
reactions?
NAD & FAD
Which would speed up the rate of a chemical reaction in the muscles?
Warming it up.
Which of the following is an exergonic reaction?
,breakdown of ATP to ADP
Which is not considered biologic work in humans?
Heat Production
What enzyme catalyzes the most immediately available energy system in your body?
Creatine Phosphate
The process of beta-oxidation involves
the breakdown of a fatty acid to acetyl-CoA
In general, the higher the intensity of the activity, the greater the contribution of:
anaerobic energy production
Aerobic production of ATP occurs in the:
in the mitochondria in a process called oxidative phosphorylation
The primary function of the Krebs cycle is to:
complete the oxidation of carbohydrates, fats, and proteins (i.e. form NADH and FADH
Your body needs oxygen to fully breakdown macronutrients to make ATP. How is oxygen used
during the process?
As an electron acceptor in the electron transport chain.
The simplest and most rapid method of producing ATP during exercise is through:
The creatine phosphate system
Fats that are stored in muscle and adipose tissue that play an important role as an energy
substrate are:
Triglycerides
At rest, the O2 concumption of a 70-kg young adult is approximately
3.5 ml/kg/min
A major rate limiting step that prevents the marathon world record average
speed from being close to the 100 m dash world record average speed is
the transfer of pyruvate from the cytosol to the mitochondria
The term oxygen deficit refers to the:
, lag in oxygen consumption at the beginning of exercise
Energy to run a maximal 400-meter race (50 to 60 seconds) comes from:
a combination of aerobic/anaerobic metabolism, with most of the ATP coming from anaerobic
sources.
Energy to run a 40-yard dash comes (<6 seconds) comes from
the creatine phosphate system
The energy to perform long-term exercise (>20 minutes) comes primarily from:
the creatine-phosphate system initially, but then mostly aerobic metabolism
Which of the following is true about VO2 during exercise?
- VO2 increases linearly with work rate
-VO2 is an indicator of aerobic ATP production
-VO2 plateaus prior to fatigue during a max test
Lactate is formed and accumulates when the rate of glycolytic production of
pyruvate and NADH exceeds the rate at which these products are shuttled
into the mitochondria.
True
After the first few minutes of constant-load, submaximal exercise, VO2 reaches steady state,
indicating that
the ATP demand is being met aerobically
What is the ultimate fate of the 6 carbons that composed a glucose molecule
after it's broken down to make ATP to fuel muscle contractions?
Exhaled as a waste product
What causes an increase in blood lactate?
high rate of glycolysis
What is the primary source of ATP production in the early stages (5-10
minutes into a 60 minute session) of high intensity STEADY-STATE exercise?
muscle glycogen
