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Drugs Alter Neurotransmission A WEBQUEST designed by Mr. Patrick M. MacLaughlin to supplement the NIH Curriculum Supplement Series- The Brain: Understanding Neurobiology Through the Study of Addiction Do All Neurotransmitters Have the Same Effect?

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drugs alter neurotransmission

Drugs Alter Neurotransmission

A WEBQUEST designed by Mr. Patrick M. MacLaughlin to supplement the NIH Curriculum Supplement Series- The Brain: Understanding Neurobiology Through the Study of Addiction

do all neurotransmitters have the same effect
Do All Neurotransmitters Have the Same Effect?
  • The activity provided in the link below shows a demonstration of a microelectrode recording the electrical activity of a neuron in the brain.
  • The action potentials are amplified, and then analyzed by a computer that counts the number of spikes that occur during a period of time.
  • The action potentials appear as vertical lines, or spikes, on the oscilloscope. A signal is also sent to an audio amplifier that produces a click sound each time an action potential is generated in the neuron. The more

frequently the spikes appear on the screen with accompanying

audible clicks, the more frequently the neuron is firing.

  • Click on the link below and follow the instructions.
  • Neurotransmitter Actions
do all neurotransmitters have the same effect3
Do All Neurotransmitters Have the Same Effect?

After completing the activity, please answer the following questions:

  • Why is saline applied to the resting neuron?
  • When the neurotransmitter glutamate is applied to the neuron, how does its activity change?
  • How does the application of the two neurotransmitters, glutamate and GABA, change the activity of the neuron?
  • Predict how the activity of the neuron would change if only GABA was applied to the neuron.
  • Do all neurotransmitters affect a neuron in the same way?
  • How would the application of glutamate to a neuron

change the amount of neurotransmitter that is

released from that neuron?

  • How would the application of GABA to a neuron

change the amount of neurotransmitter that is released

from that neuron?

what should the doctor do
What Should the Doctor Do?
  • Click on the link below, and then answer the question that follows.
  • Pathways to the Brain
  • A teenage boy is brought into the hospital emergency room after a skateboarding accident. He complains of pain in his left leg. The doctor orders an x-ray of his leg, which reveals a fracture in the tibia. Before the doctor can set the fracture and put a cast of the boy’s leg, he need to relieve the patients pain. The doctor prescribes morphine.
  • Based on what you have learned about how drugs act in the body, how should

the morphine be given to the patient? Should the morphine be given as a(n):

    • Pill
    • Shot
    • Inhalant

Consider each alternative and explain why the doctor should choose one method

over another.