1310 Department of Defence

This episode is about the immune system and the ways in which our bodies defend themselves against invasion by marauding pathogens. Ask your questions for discussion on the upcoming podcast: - Leave a free voicemail by visiting visit www.evolveducation.com.au/biology - Email to biologypodcast@gmail.com - "Like" the Facebook Page, follow link at www.evolveducation.com.au/biology. © 2013 Andrew Douch This work is copyright. Apart from any use permitted under the Copyright Act 1968, no part may be reproduced by any process without prior permission from Andrew Douch. Requests and enquiries concerning reproduction rights should be made in writing at: www.andrewdouch.com.au/contact Disclaimers: 1. The explanations provided in this podcast are given in good faith but no responsibility will be taken for their accuracy. 2. The opinions expressed in this podcast are my own. They do not represent the opinions of the VCAA or any other organisation or government body.

1309 Message Received

This episode is about signal transduction (see definition below) Ask your questions for discussion on the upcoming podcast: - Leave a free voicemail by visiting visit www.evolveducation.com.au/biology - Email to biologypodcast@gmail.com - "Like" the Facebook Page, follow link at www.evolveducation.com.au/biology. © 2013 Andrew Douch This work is copyright. Apart from any use permitted under the Copyright Act 1968, no part may be reproduced by any process without prior permission from Andrew Douch. Requests and enquiries concerning reproduction rights should be made in writing at: www.andrewdouch.com.au/contact Disclaimers: 1. The explanations provided in this podcast are given in good faith but no responsibility will be taken for their accuracy. 2. The opinions expressed in this podcast are my own. They do not represent the opinions of the VCAA or any other organisation or government body. Signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another, most often involving ordered sequences of biochemical reactions inside the cell that are carried out by enzymes and linked through second messengers. In many cases a small initial stimulus is 'amplified' and elicits a large response. This is called a signal cascade.