Lec10 - Epithelial Transport and Membrane Potential

Lec10 - Epithelial Transport and Membrane Potential -...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 10: Epithelial Transport and Membrane Potential Reading: Chapter 2, pp 69 – 72 Lecture Outline: I. Epithelial Transport I. Membrane Potential
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
An Overview of Transport Across membrane
Background image of page 2
Epithelium
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Epithelial cells involved in transport have two distinct surfaces: Apical and Basolateral. Absorption Direction of transport Secretion Direction of transport
Background image of page 4
Transport Across Epithelial Membranes In order for a molecule or ion to move from the external environment into the blood, it must first pass through an epithelial membrane. Absorption: Transport of digestion products across the intestinal epithelium into the blood. Reabsorption: Transport of molecules out of the urinary filtrate back into the blood. Transcellular transport : • Moves material through the cytoplasm of the epithelial cells. Paracellular transport: • Diffusion and osmosis through the tiny spaces between epithelial cells.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electrochemical Gradient Chemical gradient and Electrical gradient = Electrochemical Gradient
Background image of page 8
Chemical Gradient A result of membrane transport.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 18

Lec10 - Epithelial Transport and Membrane Potential -...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online