The mitochondrial proteins found in the inner membrane are involved in the conversion of adp to atp, a source of energy for the cell. this process consumes which of the following substances
(a)oxygen
(b)nitroger
(c)sulfur
(d)carbon dioxide

(a)oxygen

Explanation:

In mitochondria, most of the ATP of non-photosynthetic eukaryotic cells is produced. They metabolize acetyl coenzyme A through the enzymatic cycle of citric acid, giving CO2 and NADH as products. It is the NADH that gives electrons to a chain of electron transporters that is located in the inner membrane.

These electrons pass from one transporter to another arriving as the last step to O2, resulting H2O. This electron transport is coupled to the transport of protons from the matrix to the intermembrane space. It is this proton gradient that allows the synthesis of ATP thanks to ATP synthase. By joining phosphate to ADP and by using oxygen as the final electron acceptor, this process is called oxidative phosphorylation.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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hammurabi rulers

good lesson