MEGA
Energy in Biology
Cellular respiration is a chemical process in which the bonds between atoms of food molecules and oxygen molecul…
Item EB075002: A person’s breathing rate increases during exercise to replenish the oxygen used in the chemical reaction that releases energy for exercise (cellular respiration) and to remove the carbon dioxide produced.
Why does a person’s breathing rate increase during exercise?
- During exercise, oxygen is converted into energy needed to move. This results in a decrease in the amount of oxygen in muscle cells. In order to continue exercising, the person needs to increase the amount of oxygen in the muscle cells. Increasing the breathing rate helps this to happen.
- During exercise, the reaction between glucose and oxygen in muscle cells releases energy used for movement. This results in a decrease in the amount of oxygen and an increase in the amount of carbon dioxide in the muscle cells. In order to continue exercising, the person needs to decrease the amount of carbon dioxide and increase the amount of oxygen in muscle cells. Increasing the breathing rate helps this to happen.
- During exercise, the reaction between glucose and oxygen in muscle cells releases energy used for movement. This results in an increase in the amount of oxygen and a decrease in the amount of carbon dioxide in the muscle cells. In order to continue exercising, the person needs to decrease the amount of oxygen and increase the amount of carbon dioxide in muscle cells. Increasing the breathing rate helps this to happen.
- During exercise, a persons’ breathing rate increases because the faster a person breathes the faster they can move their bodies. Breathing rate is not affected by chemical reactions that occur in the body.
Pre-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 136 |
6–8 n = 0 |
9–12 n = 121 |
Male n = 74 |
Female n = 45 |
English n = 117 |
Other n = 8 |
||
| A. | During exercise, oxygen is converted into energy needed to move. This results in a decrease in the amount of oxygen in muscle cells. In order to continue exercising, the person needs to increase the amount of oxygen in the muscle cells. Increasing the breathing rate helps this to happen. | 43% | NAN% | 42% | 45% | 36% | 41% | 63% |
| B. | During exercise, the reaction between glucose and oxygen in muscle cells releases energy used for movement. This results in a decrease in the amount of oxygen and an increase in the amount of carbon dioxide in the muscle cells. In order to continue exercising, the person needs to decrease the amount of carbon dioxide and increase the amount of oxygen in muscle cells. Increasing the breathing rate helps this to happen. | 30% | NAN% | 31% | 20% | 47% | 32% | 0% |
| C. | During exercise, the reaction between glucose and oxygen in muscle cells releases energy used for movement. This results in an increase in the amount of oxygen and a decrease in the amount of carbon dioxide in the muscle cells. In order to continue exercising, the person needs to decrease the amount of oxygen and increase the amount of carbon dioxide in muscle cells. Increasing the breathing rate helps this to happen. | 20% | NAN% | 20% | 30% | 7% | 20% | 25% |
| D. | During exercise, a persons’ breathing rate increases because the faster a person breathes the faster they can move their bodies. Breathing rate is not affected by chemical reactions that occur in the body. | 7% | NAN% | 7% | 5% | 11% | 7% | 13% |
Post-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 149 |
6–8 n = 0 |
9–12 n = 130 |
Male n = 76 |
Female n = 54 |
English n = 124 |
Other n = 5 |
||
| A. | During exercise, oxygen is converted into energy needed to move. This results in a decrease in the amount of oxygen in muscle cells. In order to continue exercising, the person needs to increase the amount of oxygen in the muscle cells. Increasing the breathing rate helps this to happen. | 20% | NAN% | 23% | 21% | 22% | 22% | 40% |
| B. | During exercise, the reaction between glucose and oxygen in muscle cells releases energy used for movement. This results in a decrease in the amount of oxygen and an increase in the amount of carbon dioxide in the muscle cells. In order to continue exercising, the person needs to decrease the amount of carbon dioxide and increase the amount of oxygen in muscle cells. Increasing the breathing rate helps this to happen. | 48% | NAN% | 45% | 50% | 46% | 45% | 40% |
| C. | During exercise, the reaction between glucose and oxygen in muscle cells releases energy used for movement. This results in an increase in the amount of oxygen and a decrease in the amount of carbon dioxide in the muscle cells. In order to continue exercising, the person needs to decrease the amount of oxygen and increase the amount of carbon dioxide in muscle cells. Increasing the breathing rate helps this to happen. | 26% | NAN% | 25% | 21% | 24% | 26% | 0% |
| D. | During exercise, a persons’ breathing rate increases because the faster a person breathes the faster they can move their bodies. Breathing rate is not affected by chemical reactions that occur in the body. | 7% | NAN% | 8% | 8% | 7% | 7% | 20% |