Answer:
Regulation of intake is governed by thirst receptors that pick up signals of dehydration and return the body to a rehydrated state.
Explanation:
The state of hydration in someone's body is given by the plasma osmolarity values (the ratio of solutes to water in blood plasma). After regular activities that involve the loss of water, such as urination and sweating, happen, the blood begins to concentrate and the osmoreceptors located in the hypothalamus are triggered to generate a response that leads to water intake.
An ion (hydrogen ions, H⁺) gradient has potential energy which can be used for making ATP. Because of the proton gradient, H⁺ will diffuse from an area with higher proton concentration to an area with lower proton concentration. ATP synthase is the enzyme which allows protons to pass through the membrane and uses the free energy difference to convert ADP into ATP.
The p<span>roton gradient is made by electron transport chain which pumps H</span>⁺<span>.</span>
Answer:
A. The blood goes back to the heart to get oxygen.
