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Natasha_Volkova [10]
4 years ago
6

What two types of molecules move through a cell membrane Using a channel protein?

Biology
1 answer:
Helga [31]4 years ago
7 0

Answer:

polar and ionic molecules

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What is the structure that has two main parts that cover the eye, limiting the amount of the light entering the pupil, and assis
igomit [66]

Answer:

Sclera

Explanation:

Sclera is the outer most cover of eye that is fibrous and tough controls both the light entering the pupil as well as the distribution of tear film over the exposed corneal surface.

It provides protection, and is a sensory part of eye, in addition it is also considered as communicating tool.

4 0
3 years ago
The method for determining energy expenditure that involves the measurement of heat given off by the body during a select period
Kryger [21]

Answer:

The correct answer is direct calorimetry.

Explanation:

A method of attaining direct determination of the concentration of heat produced by the body inside an insulated chamber, which is sufficiently big to allow moderate amounts of work is termed as direct calorimetry. These chambers within which the measurement is done is also known as the whole-room calorimeters.  

The mentioned process provides the measurement of the energy discharged in the form of heat.  

3 0
3 years ago
How does glucose from the small intestine move to a muscle cell
Arisa [49]

It moves by active transport.hope this helps!

3 0
3 years ago
NADH and FADH2 are both electron carriers that donate their electrons to the electron transport chain. The electrons ultimately
maria [59]

Answer:

Explanation:

NADH and FADH2 are both electron carriers of the electron transport chain. NADH gives up its electrons starting from Complex I, which has a higher energy level compared to other complexes. Energy is given off to pump protons across the membrane by the time electrons are transferred to ComplexIII. More electrons are pumped across the membrane as electrons move to Complex IV. Because NADH commenced giving up its electrons from Complex I (higher energy level complex), more protons are pumped across the membrane gradient, which enables ATP synthase with more power to produce 3ATP molecules per NADH molecule.

On the other hand, 2 molecules of ATP are generated by FADH2 because it starts by giving up its electrons to ComplexII. It missed a chance to pump protons across the membrane when it passed Complex I. By the time the electrons reach Complex IV, less protons have been pumped. The lesser the protons to power ATP synthase, the lesser the ATP molecules produced.

8 0
4 years ago
Which of the following happened partly in response the fire on the Cuyahoga River? Select two correct answers.
dlinn [17]

Answer:

- Congress passed the Clean Water Act into law.

- The National Environmental Policy Act was passed, which led to the formation of the EPA.

Explanation:

7 0
2 years ago
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