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1

Muscle Contraction

The Synapse (Anatomy)

Label from image in Chapter 48

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2

Synaptic Transmission

Synaptic Transmission

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3

Excitatory Post-Synaptic Potentials

(ex: glutamate opens Na+ channel)

Inhibitory Post-Synaptic Potentials

(ex: GABA opens Cl- channel)

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4

Muscle Anatomy

Muscle Anatomy

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5

Sliding Filament Theory

Sarcomere Contraction

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Importance of Calcium

Regulation of muscle contraction

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7

Prep for Basics Quiz

Can you do the following?

• Draw and label a synapse

• List the steps of synaptic transmission

• Compare and contrast excitatory and inhibitory

synaptic potentials

• Draw and label a neuromuscular junction

• Explain the steps in the sliding filament model of

muscle contraction

• Describe the steps of a neuromuscular action

potential causing muscle contraction