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WELLNESS 10 ADDICTION UNIT LESSON 3 OF 10.  Review Neurotransmission  Worksheet “Neurotransmission”  Drugs Disrupt Neurotransmission  Reading  Questions.

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Presentation on theme: "WELLNESS 10 ADDICTION UNIT LESSON 3 OF 10.  Review Neurotransmission  Worksheet “Neurotransmission”  Drugs Disrupt Neurotransmission  Reading  Questions."— Presentation transcript:

1 WELLNESS 10 ADDICTION UNIT LESSON 3 OF 10

2  Review Neurotransmission  Worksheet “Neurotransmission”  Drugs Disrupt Neurotransmission  Reading  Questions  Animations  Drawings  Volleyball Tournament Results

3 Diagram 2  Communication between 2 neurons begins when an electrical impulse travels along the axon of a sending neuron toward the axon terminal.  The electrical impulse can’t cross the synapse. When it reaches the axon terminal, it causes the vesicles to move toward the membrane of the axon terminal.

4 Diagram 3Diagram 4  The membrane of the vesicle fuses with the membrane of the axon terminal, enabling the vesicle to release it’s contents (neurotransmitters) into the synapse.  The neurotransmitters (dopamine) drift across the synapse and bind to receptors on the receiving neuron.

5 Diagram 5  The binding of a neurotransmitter to its receptor can trigger an electrical impulse in the receiving neuron. The electrical signal then moves toward the cell body of the receiving neuron.

6 Diagram 6  Once the message is relayed, it releases from the receptor into the synapse.  Some neurotransmitters are degraded by enzymes in the synapse  Some are carried back into the sending neuron through transporters. They are repackaged into vesicles that can be released the next time an action potential reaches the axon terminal.

7 Reading, Questions, Animations, Drawings

8 1. In what 3 ways do drugs interfere with neurotransmission?  Increase the amount of dopamine released into the synapse  Activate or block dopamine receptors  Slow/stop the removal of dopamine from the synapse 2. What common action on the brain do ALL drugs of abuse share?  They all increase levels of dopamine

9

10 If time: How do drugs get into the body?


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