Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate answer choice for each blank.
下面的文本有一些空格。点击每个空格会出现一组选项，请为每个空格选出最合适的答案。
Chemistry is an extremely important topic in physiology. Most physiological processes occur as the of chemical changes that occur within the body. These changes include the influx/efflux of ions across a neuron's membrane, causing a to pass from one end to the other. Other examples include the of oxygen in the blood by a protein as it passes through the lungs for throughout the body.
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