Figure 3.2 Sherrington’s evidence for synaptic delayAn impulse traveling through a synapse in the spinal cord is slower than one traveling a similar distance along an uninterrupted axon.

9/27/2002

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Table of Contents

Figure 3.2 Sherrington’s evidence for synaptic delayAn impulse traveling through a synapse in the spinal cord is slower than one traveling a similar distance along an uninterrupted axon.

The Concept of the Synapse

Figure 3.3 Recordings from a postsynaptic neuron during synaptic activation

Postsynaptic and Action Potentials

Figure 3.7 Loewi’s experiment demonstrating that nerves send messages by releasing chemicalsLoewi stimulated the vagus nerve to one frog’s heart, decreasing the heartbeat. Then he transferred fluid from that heart to another frog’s heart and observed a decrease in its heartbeat.

Chemical Events at the Synapse

Sequence of Events at a Synapse

Types of Neurotransmitters

Figure 3.12 Neurotransmitter receptorsA neurotransmitter receptor as it would look if folded out.

Activation of Receptors

Activation of Receptors

Inactivation and Reuptake

Synapses, Abused Drugs, and Behavior

Synapses, Reinforcement, and Drug Use

Figure 3.15 Events at a dopamine synapse and how certain drugs affect the processDrugs can alter any stage of processing at a synapse, from synthesis of the neurotransmitter through release and reuptake.

An Exploration of Drugs

An Exploration of Drugs

Hormones and Behavior

Hormones and Behavior

Author: Linda L. Lockwood