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Unit 1:
Ch. 1
Ch. 2
Ch. 3
Interlude A
Unit 2:
Ch. 4
Ch. 5
Ch. 6
Ch. 7
Ch. 8
Ch. 9
Interlude B
Unit 3:
Ch. 10
Ch. 11
Ch. 12
Ch. 13
Ch. 14
Ch. 15
Interlude C
Unit 4:
Ch. 16
Ch. 17
Ch. 18
Ch. 19
Interlude D
Unit 5:
Ch. 20
Ch. 21
Ch. 22
Ch. 23
Ch. 24
Ch. 25
Ch. 26
Ch. 27
Ch. 28
Ch. 29
Ch. 30
Interlude E
Unit 6:
Ch. 31
Ch. 32
Interlude F
Unit 7:
Ch. 33
Ch. 34
Ch. 35
Ch. 36
Ch. 37
Ch. 38
Interlude G
The animations require the latest Flash 7 and Shockwave plug-ins.
25.1: Tutorial: Neurotransmitter release
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This tutorial examines the events that take place at a typical chemical synapse in the central nervous system.

25.2: Activity: How Axons Transmit Signals
ThumbnailLearn how axons transmit nerve impulses in myelinated versus unmyelinated neurons.

25.3: Activity: Neurotransmitter function

Test your understanding of the information presented in Table 25.1.

25.4: Activity: Organization of the human nervous system

Test your recall for figure 25.4 with this key figure labeling exercise.

25.5: Tutorial: Reflex arcs
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This tutorial explores how a simple circuit of neurons allows us to take quick action without having to "think" about it.

25.6: Activity: The cerebral cortex

Test your recall for figure 25.8 with this key figure labeling exercise.

25.1: Process Animation: How axons transmit signals: Unmyelinated neuron
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25.2: Process Animation: How axons transmit signals: Myelinated neuron
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