Lecture 9

Question 1

Whether a neurotransmitter is excitatory or inhibitory

Answer 1

Depends on the properties of its receptors

Question 2

A simple reflex behavior

Answer 2

• stim of the mantle or siphon leads to gill withdrawal
• this reflex habituates with repeated stimulation
• this reflex can also be enhanced, or sensitized, in response to a novel stimulus

Question 3

The reduction/enhancement of the motor-neuron Excitatory Post Synaptic Potentials (EPSPs)

Answer 3

Mirrors the behavioral habituation/sensitization

Question 4

Sensitization involves a

Answer 4

secondary facilitating interneurons

Question 5

Short-term Habituation

Answer 5

Occurs from a reduction in neurotransmitter releases by the sensory neuron

Question 6

Short-term Sensitization

Answer 6

Occurs from an increase in neurotransmitter release as a result of presynaptic facilitation

Question 7

Long-term Sensitization

Answer 7

Can occur if kinase activity elicits changes in sensory neuro-protein synthesis

Question 8

Long-Term Neuromodulation: Potentiation

Answer 8

Tetanic Stimulation of neurons in the hippocampus leads to an increase in EPSPs

Question 9

Synaptic Plasticity:

Answer 9

• Modify the strength of the connection between 2 neurons
• Modify nt release rate of syntheses
• adjust Post-Synaptic Sensitivity

Question 10

Synaptic Plasticity: Modify the Strength of Connection Between 2 Neurons

Answer 10

The amp of post-synaptic potential

Question 11

Synaptic Plasticity: Modify nt release rate of syntheses

Answer 11

• regulate Ca 2+ Concentration
• Build new presynaptic terminals
• use modulators

Question 12

Synaptic Plasticity: Adjust post-synaptic Sensitivity

Answer 12

• Recruit different receptors
• Add/Remove receptors
• Change size