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Reabsorption and Secretion Along the Proximal Tubule - Anatomy & Physiology (view source)
Revision as of 16:07, 7 September 2008
, 16:07, 7 September 2008→Introduction to Reabsorption
* Small proteins and peptide hormones are reabsorbed by endocytosis
* Small proteins and peptide hormones are reabsorbed by endocytosis
* Other substances are secreted or reabsorbed in the tubules passively by '''[[Transport Proteins - Physiology#Facilitated Diffusion |facilitated]]''', none facilitated [[Diffusion - Physiology| '''diffusion''']] or [[Transport Proteins - Physiology#Diffusion Through Water Filled Protein Channels |'''ion channels''']] down chemical or electrical gradients.
* Other substances are secreted or reabsorbed in the tubules passively by '''[[Transport Proteins - Physiology#Facilitated Diffusion |facilitated]]''', non-facilitated [[Diffusion - Physiology| '''diffusion''']] or [[Transport Proteins - Physiology#Diffusion Through Water Filled Protein Channels |'''ion channels''']] down chemical or electrical gradients.
* Other substances are secreted or reabsorbed by [[Active Transport - Physiology| '''active transport''']] against such gradients
* Other substances are secreted or reabsorbed by [[Active Transport - Physiology| '''active transport''']] against such gradients
** Movement is via [[Transport Proteins - Physiology#ATPases |'''ATPases''']].
** Movement is via [[Transport Proteins - Physiology#ATPases |'''ATPases''']].