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Aleonysh [2.5K]
2 years ago
10

What are the three most commonly used instruments for the determination of free-living physical activity and energy expenditure?

Biology
1 answer:
satela [25.4K]2 years ago
6 0
The most used instruments for the determination of free-living physical activity and energy expenditure are; whole-room indirect calorimeter, Accelerometers and pedometers and also the Doubly-Labeled Water. Indirect calorimetry measures gas exchange from which energy expenditure can be estimated, Double labeled water is the most relevant method for measuring free-living energy expenditure in animals and humans, it is based on exponential disappearance from the body of the stable isotopes (H and O) after a bolus dose of water. Accelerometers and pedometers provide an inexpensive overall measure of physical activity, however they are unable to asses the intensity, frequency and duration of activity or to estimate energy expenditure.

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Which of the following are part of the chemiosmotic coupling model? Protons are pumped out of the mitochondrial matrix into the
Lina20 [59]

The correct answer is: Protons are pumped out of the mitochondrial matrix into the intermembrane space

Chemiosmosis can be described as movement of ions across a selectively permeable membrane, down their electrochemical gradient. It occurs during the cellular respiration within mitochondria and it is involved in ATP synthesis (oxidative phosphorylation via ATP synthase).

Electrons from electron carriers (NADH and FADH) donate electrons to the electron transport chain and that causes changes in protein complexes of electron transport chain. As a consequence, protein complexes pump H+ across a selectively permeable cell membrane from the mitochondrial matrix into the intermembrane space of mitochondria.  

H+ can only get back and pass through the inner mitochondrial membrane with the help of ATP synthase (down their electrochemical gradient). ATP synthase turned by the force of the H+ diffusing through it forms ATP by adding a phosphate to ADP.

4 0
3 years ago
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dalvyx [7]

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D Ecosystem

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5 0
2 years ago
Which of the following is a cause of a DNA mutation?
Reika [66]
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7 0
1 year ago
Which of these is not a product of cellular respiration
kakasveta [241]

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4 0
3 years ago
Which is a limitation of a scientific model?
iren [92.7K]

Answer:

The correct option is<em> D)  Models are not the "real thing" so it will never correctly represent the system in all respects.</em>

Explanation:

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As models are not the real, hence they cannot be considered to be perfectly accurate. A model can never mark up to the complexity of nature.

8 0
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