Flashcards in Nervous Tissue CH 11 Deck (41)
Flow of electrical charge from one point to another
The hindrance to charge flow provided by substance it passes through
2 membrane ion channels
1. Chemically gated
2. Voltage gated
Chemically gate ion channels
Open when neurotransmitter binds
Voltage gated ion channels
Open and close in response to changes in membrane potential.
Resting membrane potemtial
The potential difference in a resting neuron
Generating resting membrane potential depends on:
1. Differences in K+ and Na+ concentrations in and out of the cell.
2. Differences in permeability of plasma membrane to those ions.
Change in membrane potential can produce:
1. Graded potentials:Incoming signals over short distances
2. Action potentials: long dostance signals of axons
Decrease in membrane potential