Question 2
Enzymes basically work by...
A.
Directly providing ATP for muscle contraction
B.
Lowering the activation energy required to drive the reaction
C.
Combining with NAD+ to provide energy
D.
Helping oxygen attach to substrate during metabolism
E.
Both A and B
Anaerobic glycolysis yields a net gain of...
5 ATP
10 ATP
8 ATP
2 ATP
After a few minutes of easy jogging at a submaximal intensity, my oxygen consumption and heart rate reach a plateau and stay at that level for 20 to 30 minutes as I am jogging. With regards to oxygen consumption this would be an example of ...
A.
intermittent exercise
B.
an oxygen deficit
C.
incremental exercise
D.
a steady state
E.
homeostasis
Question 17
The RQ measured for a subject who has been jogging easily at 70% VO2max for about 40 minutes and is in a steady state will likely be?
A.
over 1.0
B.
close to .7
C.
close to .5
D.
close to .9
Question 57
A person exercises in their âfat burning zoneâ for 4 hours at 35% VO2peak. The O2 cost of exercise at that work rate is 0.5L/minute. Following exercise the subject rewards himself with an ice-cream sundae (700kcal). The following statement is true(assume 5kcal/lit of O2):
A.
The subject is in neutral energy balance
B.
The subject consumed fewer calories than they expended during exercise
C.
The subject consumed more calories than they expended during exercise
D.
Canât say
Question 2
Enzymes basically work by...
| A. | Directly providing ATP for muscle contraction | |
| B. | Lowering the activation energy required to drive the reaction | |
| C. | Combining with NAD+ to provide energy | |
| D. | Helping oxygen attach to substrate during metabolism | |
| E. | Both A and B |
Anaerobic glycolysis yields a net gain of...
| 5 ATP | ||
| 10 ATP | ||
| 8 ATP | ||
| 2 ATP |
After a few minutes of easy jogging at a submaximal intensity, my oxygen consumption and heart rate reach a plateau and stay at that level for 20 to 30 minutes as I am jogging. With regards to oxygen consumption this would be an example of ...
| A. | intermittent exercise | |
| B. | an oxygen deficit | |
| C. | incremental exercise | |
| D. | a steady state | |
| E. | homeostasis |
Question 17
The RQ measured for a subject who has been jogging easily at 70% VO2max for about 40 minutes and is in a steady state will likely be?
| A. | over 1.0 | |
| B. | close to .7 | |
| C. | close to .5 | |
| D. | close to .9 |
Question 57
A person exercises in their âfat burning zoneâ for 4 hours at 35% VO2peak. The O2 cost of exercise at that work rate is 0.5L/minute. Following exercise the subject rewards himself with an ice-cream sundae (700kcal). The following statement is true(assume 5kcal/lit of O2):
| A. | The subject is in neutral energy balance | |
| B. | The subject consumed fewer calories than they expended during exercise | |
| C. | The subject consumed more calories than they expended during exercise | |
| D. | Canât say |
Related textbook solutions
Related questions
Question 13
A swimmer you are training for a 100-meter swim even reports that he is taking a supplement that improves isocitrate dehydrogenase activity. Assuming that the typical swim time for this individual is 52 seconds the likely effect would be:
| A. | Greatly improved swim performance | |
| B. | Worsened swim performance | |
| C. | No change | |
| D. | Not enough information |
Question 14
Which of the following reactions will result in the most ATP production?
| A. | Breakdown of 30 mols of creatine phosphate (CP) | |
| B. | Complete oxidation of 5.0 mols pyruvic acid or pyruvate | |
| C. | Oxidation of 10 mols of NADH + H+ | |
| D. | Breakdown of 2 mols of glucose to 4 mols of lactic acid |
Question 15
Why does muscular work become increasingly difficult with lactic acid accumulation?
| because lactic acid causes muscle injury | ||
| because lactic acid interferes with the diffusion of oxygen into mitochondria. | ||
| because lactic acid causes a rise in muscle temperature with renders enzymes involved in the glycolysis and the citric cycle non-functional | ||
| because the rising concentration of hydrogen ions leads to a drop in ph which renders enzymes involved in the glycolysis and the citric cycle non-functional |
Question 16
A 100-meter sprinter that you are training reports that a friend suggested that he take a supplement called âSprintex.â The label states that consuming this supplement will âturbocharge your mitochondria.â What effect would this supplement have on the athleteâs sprint performance?
| A. | Improve | |
| B. | Worsen | |
| C. | No Change | |
| D. | Can't tell |
Question 17
The RQ measured for a subject who has been jogging easily at 70% VO2max for about 40 minutes and is in a steady state will likely be?
| A. | over 1.0 | |
| B. | close to .7 | |
| C. | close to .5 |
Question 39
Oxidation refers to the donation of electrons by a molecule, while reduction refers to the acceptance of electrons by a molecule.
True
False
Question 40
In negative feedback, the response of the system is ...
| A. | to increase the effectiveness of the stimulus | |
| B. | opposite that of the stimulus | |
| C. | to modify a receptorâs response to the stimulus | |
| D. | both A and C are correct | |
| E. | none of the above are correct |
Question 41
During the citric acid cycle, oxygen is a vital component for ATP production.
True
False
Question 42
During lower intensity exercise, (25% VO2max) which of the following sources will provide most of the energy?
| A. | Muscle Glycogen | |
| B. | Plasma Glucose | |
| C. | Plasma Free-fatty Acids | |
| D. | Muscle Triglycerides | |
| E. | ATP-PC |
Question 45
A half-marathoner expends 1600 kcals of energy over the course of 13 miles. Assuming that the half-marathon was run at an RQ of 0.85. Secondly, if the body fat stores in the individual were 8kg what is the net amount of fat left in adipose tissue depots at the end of the event?
| A. | 7.912 kg | |
| B. | 6.0 kg | |
| C. | 6.5 kg | |
| D. | 6.5 kg |
