Unit 1 Questions

Front 1

What is the name of the transport protein that is bound to circulating FFAs in plasma?

Back 1

Albumin

Front 2

The process of beta oxidation invloves...

Back 2

The conversion of a fatty acid to acetyl-CoA

Front 3

An individual does an 800m run at 90% VO2 max and it takes him 2.5 minutes. How many ATP per molecule are produced from his primary fuel source during is run?

Back 3

3 ATP

Front 4

Which pathways are responsible for supplying ATP during the 02 deficit.

Back 4

ATP-PCr and anaerobic glycolysis

Front 5

A person has been running on the treadmill for 10 minutes. During the last 5 minutes of exercise, her RER was on average 0.98. What macro is she mostly using?

Back 5

Carbs

Front 6

Anaerobic production of ATP occurs in the...

Back 6

Cytoplasm in a process called glycolysis

Front 7

What is happening during the slow portion of EPOC.

Back 7

Body attempting to return HR, breathing, and body temp resting levels.

Front 8

(T/F) In prolonged moderate to high intensity exercise, muscle shifts from blood glucose use to muscle glycogen use after 2-3 hours.

Back 8

False

Front 9

What is the primary substrate(s) and pathway(s) providing ATP as you sit here taking this exam.

Back 9

FLASH, lipolysis and beta oxidation, Krebs cycle and oxidative phosphorylation.

Front 10

Which of the following is most likely a typical RER value while taking an exam.

Back 10

0.75

Front 11

02 deficit is...

Back 11

Lag in 02 consumption at the onset of exercise

Front 12

Lactate threshold:

Back 12

It is when lacate production significantly exceeds clearance.

Front 13

(T/F) The VO2 used during the O2 deficit should really be the VO2 used during EPOC for an exercise bout.

Back 13

False

Front 14

(T/F) The terms anaerobic threshold and lactate threshold can be used interchangeably.

Back 14

False

Front 15

Cori cycle:

Back 15

Lacate formed in the muscle is transported to the liver and used to synthesize glucose .

Front 16

In skeletal muscle, lactate is transferred into the mitochondria by the following mechanism...

Back 16

Intracellular lacate shuttle

Front 17

An increase in ATP inhibits the activity of this important rate limiting enzyme in the ATP-PCr pathway

Back 17

Creatine kinase

Front 18

What factor has the greatest impact on the volume of EPOC

Back 18

Exercise intensity

Front 19

What would be the primary bioenergetic pathway supplying ATP for an 800m run that was completed in 2 minutes?

Back 19

Anaerobic glycolysis

Front 20

Which exercise session would you expect to produce the greatest EPOC.

Back 20

Running at 80% VO2 max for 1 hour

Front 21

What determines how many ATP are produced per each triglyceride molecule?

Back 21

The number of carbons per FFA chain

Front 22

What would be the best exercise protocol for measuring lactate threshold?

Back 22

Incremental exercise: start slow and increase workload. Sample blood every 2 min

Front 23

What is the impact of aerobic traning on substrate use during exercise?

Back 23

Increases the proportion of fat oxidation at any given intensity.

Front 24

(T/F) Research has consistently shown that a High fat diet causes glycogen sparing which results in increased endurance performance during exercise.

Back 24

False

Front 25

How does carb availability affect fatty acid oxidation and exercise performance?

Back 25

Carb depletion results in reduced fatty acid oxidation and reduced exercise performance.

Front 26

The process of breaking down triglycerides into free fatty acids and glycerol is called

Back 26

Lypolysis

Front 27

Untrained Ursula and endurance athlete Ellie are running on treadmills side by side each at 50% VO2 max. They both run for 30 minutes, then stop exercising. Who will have the greater EPOC after exercise?

Back 27

Ursula

Front 28

A marathon runner is planning his food/drink for during the race. Which of the following would be most effective in maintaining pace? Peanut butter of Gatorade?

Back 28

Gatorade

Front 29

What has many fates following exercise?

Back 29

Lactate

Front 30

(T/F) H20 is the final electronic acceptor in the ETC.

Back 30

False

Front 31

The rate limiting enzymes of glycolysis are inhibited by what?

Back 31

Decrease in pH (More acidic)

Front 32

After an endurance training workout, what should you focus on consuming in order to replenish your muscle glycogen?

Back 32

Carbs

Front 33

During the rapid portion of EPOC, the excess VO2 is due to

Back 33

Restoration of muscle PCr and blood and muscle oxygen stores.

Front 34

Which of the following is the rate limiting enzyme of glycolysis

Back 34

Phosphofructokinase.

Front 35

At which exercise intensity would cause 50% CHO use and fat use?

Back 35

65% VO2 max

Front 36

How does eating CHO before exercise impact substrate use during an acute exercise session?

Back 36

Decreased fat oxidation

Front 37

Each pair of electrons passed through the electronic transport chain from FADH2 to oxygen releases enough energy to form how much ATP?

Back 37

1.5 ATP

Front 38

Energy to jog at moderate intensity (less than 50%VO2 max) comes from..

Back 38

Mostly aerobic metabolism with some anaerobic metabolism

Front 39

The primary function of the Krebs cycle is to produce what

Back 39

NADH and FADH2

Front 40

(T/F) The enzyme responsible for the formation of ATP during oxidative phosphorylation is ATP synthase.

Back 40

True

Front 41

In the process of oxidative phosphorylation, ATP formation is driven by...

Back 41

H+ ions re-entering the mitochondria through the ATP synthase.

Front 42

During exercise, the majority of lacate is cleared by what?

Back 42

Oxidation to pyruvate

Front 43

Untrained Ursula and endurance athlete ellie go for a run together. They run at Ursula pace of 6.0 mph. How will their 02 deficits compare?

Back 43

Ursula 02 will be greater

Front 44

(T/F) The flow of H+ ions from the inter-membrane space back into the mitochondrial matrix powers the aerobic production of ATP.

Back 44

True

Front 45

(T/F) Fitness level is inversely proportional to EPOC, meaning that the higher an 8ndividuals fitness level, the lower the EPOC.

Back 45

True

Front 46

The first step of _______ is to activate the fatty acid to form a fatty acyl-CoA requires investment of:

Back 46

Beta oxidation, 2 ATP

Front 47

Carbohydrate supplementation during exercise is most important in performances lasting...

Back 47

Longer than an hour

Front 48

(T/F) When comparing different types of exercise, different intensities and different durations, the exercise results in the greatest total oxygen consumed during the exercise portion will result in the greatest total EPOC.

Back 48

False (exercise status)

Front 49

During high intensity exercise (80%VO2) for 3 hours,_____ is the primary substrate utilized and _____ is the primary form of CHO utilized while ________ is the mIn source of fat utilized.

Back 49

CHO, blood glucose, FFAs

Front 50

The energy to perform long term, low intensity exercise (20% VO2max for 60 min) comes primarily from

Back 50

Aerobic metabolism, primarily using FFAs.