Molecules move across the membrane
Movement of glucose through a cell
through channels or by carrier molecules from a region of higher concentration to one of lower concentration.
Water molecules move from regions of higher concentration toward regions of lower concentration through a selectively permeable membrane.
Distilled water entering a cell
Smaller molecules are forced through porous membranes from regions of higher pressure to regions of lower pressure.
Molecules leaving blood capillaries
II. Active (Physiological) Processes
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.