The specific role of oxygen in the cell is to Select one: a. enhance the product

Question

The specific role of oxygen in the cell is to

Select one:

a. enhance the production of NADH in glycolysis.

b. promote oxidation of FADH2.

c. act as an energy source for ATP production.

d. act as a final electron acceptor.

Energy production is highly correlated with the amount of

Select one:

a. food consumed.

b. oxygen consumed.

c. water excreted.

d. carbohydrates used.

Assuming individuals of the same body size, one who is at _______ would have the lowest VO2max.

Select one:

a. sea level

b. 500 feet above sea level

c. 1000 feet above sea level

d. 1500 feet above sea level

Most animals are _______. Most endotherms are _______.

Select one:

a. endotherms; thermoregulators

b. ectotherms; thermoconformers

c. endotherms; nonthermoregulators

d. ectotherms; thermoregulators

You are in Las Vegas in summer and you see a dog tied to a fence with no access to shade. As the dog is obviously having problems with the heat, what would be the fastest means of cooling the dog’s internal temperature?

Select one:

a. Put the dog in an 87°F pool of water.

b. Put a few ice cubes in the dog's water bowl.

c. Put the dog in the shade and near a fan.

d. Shave the dog's fur off.

Explanation / Answer

1. Option D is correct. Oxygen accept the electron transported through electron transport chain during respiration process. After accepting electron, oxygen molecule converts into water molecule.

2. Option B is correct. Oxygen consumed during respiration process. Oxygen is used as final electron acceptor from electron transport chain which causes reversal of protons into matrix from intermembrane space of mitochondria leading to change in proton gradient across the mitochondrial membrane. This change in proton gradient causes phodphorylation of ADP into ATP i.e production of energy.

3. Option D is correct. VO2 max decreases as we go to higher altitude from sea level therefor the lowest calue of VO2 max will be at 1500 feet above sea level.

4. Option B is correct. Ectotherms indicates a group of animals that primarly gains heat through the environment for example fish, amphibia, reptiles. Endotherms indicate a group of animal that produces its own heat. Thermoregulator indicates regulation of body temperature regardless of environmental condition while thermal conformation indicates changes in body temperature with change in environmental temperature.

5. C is the correct answer. Shaving is not a good idea because fur play a role in thermoregulation. 87F is equals to almost 30 C which is also not a good idea.

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