Synaptic Integration I: Post-Synaptic Potentials (EPSPs and IPSPs)

Concept: Post-Synaptic Potentials

3m

Concept: Review of Threshold Potential

2m

Concept: Excitatory vs. Inhibitory PSPs

2m

Problem: γ-aminobutyric acid (GABA) is a neurotransmitter important in brain function. GABA binds to GABA receptors on post-synaptic neurons; when GABA is bound to GABA receptors, the GABA receptors open to allow Cl- to cross the cell membrane. For neurons in the brain, ECl-= -90 mV. Which of the following describes the post-synaptic potentials caused by GABA binding to GABA receptors in the brain?

2m

Problem: Nicotinic acetylcholine receptors are post-synaptic receptors throughout the body. When Ach is bound to them, nAchRs open to allow Na+ (and K+, but mostly Na+) to cross the cell membrane. For neurons in the brain, ENa+=+60 mV. Which of the following describes the post-synaptic potentials caused by Ach binding to nAchRs receptors?

2m