1. Slide 4.1 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 The central nervous system and peripheral nervous system

2. Slide 4.2 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 The human brain Source: Reprinted from England, M.A. and Wakely, J., A Colour Atlas of the Brain and Spinal Cord, p. 39. Aylesbury: Wolfe, 1991. Copyright © 1991, by permission of the publisher Mosby.

3. Slide 4.3 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 A slice through the human brain Source: Harvard Medical School/Betty G. Martindale.

4. Slide 4.4 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 The principal parts of a neuron and its connections with other neurons

5. Slide 4.5 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 Ion channels and ion transporters

6. Slide 4.6 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 Movement of sodium and potassium ions during the action potential

7. Slide 4.7 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 The release of a transmitter substance from a terminal button (a)

8. Slide 4.8 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 The release of a transmitter substance from a terminal button (b)

9. Slide 4.9 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 The release of a transmitter substance from a terminal button (c)

10. Slide 4.10 Carlson, Martin and Buskist, Psychology, 2 nd European edition © Pearson Education Limited 2006 Reuptake of transmitter substance