BIO 203 Lecture 9

BIO 203 Lecture 9 - February 22, 2007 Physiological...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
February 22, 2007 Physiological communication between cells Electrical – not involving receptors, other kinds will involve receptors o Need a direct cytoplasmic connection, through a gap junction o 2 different sets of proteins that lock and create a connection, allow movement of ions o proteins called connexins, allowing the cells to function as one o 2 physiological tissues which do this, form a synctium cardiac coordinative contraction of the various chambers left and right sides contract as if they were one smooth contraction of cells, peristaltic wave that moves material Chemical – requires receptor-mediation o Chemical messenger never determines specificity, always the receptor, key to physiological responses to chemical messengers o Contact dependent signals – require interaction between membrane molecules between 2 cells Immune system Cell migration during development o Autocrine signals act on the same cell that secreted them o Paracrine signals are secreted by one cell and diffuse to adjacent cells Oxygen, carbon dioxide, lactic acid, histamine, nitric oxide o Examples of short distance reactions Nervous system: synaptic transmission
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/08/2008 for the course BIO 328 taught by Professor Cabot during the Spring '07 term at SUNY Stony Brook.

Page1 / 3

BIO 203 Lecture 9 - February 22, 2007 Physiological...

This preview shows document pages 1 - 2. Sign up to view the full document.

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