Examlex
Which of the following symptoms is very often the first indication that a person has osteoporosis?
ATP
Involved in metabolic processes, ATP (adenosine triphosphate) is the key energy transporter in cells.
Ingestion
The method by which food, liquids, or other substances are introduced into the body through swallowing or absorption.
Active Transport
A cellular process that requires energy to move substances across cell membranes against a concentration gradient.
Concentration Gradient
The gradual difference in the concentration of solutes in a solution between two regions. In biology, it often refers to differences across a membrane.
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