Post Test 5 Flashcards
a common chemicalvused to alleviate symptoms in people living with Parkinson’s disease
L-dopa
the difference in electrical charge between the inside and outside of the cell and is recorded using microelectrodes
Membrane Potential
The resting potential inside the neuron is approximately (blank) mv less than that outside the cell
-70 mV
Sodium and potassium ions are both
positively charged
In a resting neuron, there are more ___ ions outside the cell and more ___ ions inside the cell
na+, k+
K+ ions are largely held inside the cell because of the membrane’s ___ resting potential
negative
_______ pumps ensure that at resting potential,
three Na+ ions move inside the cell and two K+
ions move outside the cell.
Sodium-Potassium Pumps
_______ are released into the synaptic cleft, and
they attach to receptor molecules on the
postsynaptic membrane of the next cell
neurotransmitters
The neurotransmitters may _______ the
postsynaptic receptive membrane, which implies
that the resting membrane potential will increase.
Hyperpolarize
_______ postsynaptic potentials increase the
likelihood that a neuron will fire.
Excitatory Postsynaptic Potentials
Postsynaptic potentials _______ in amplitude as
they travel through the neuron.
decrease
A momentary increase of membrane potential to
about +50 mV is called _______
action potential
Each neuron sums the number of excitatory and
inhibitory postsynaptic potentials to create a single
signal, a process called _______.
integration
When postsynaptic potentials that are produced in
rapid succession at the same synapse are added,
we have _______ summation.
temporal
When postsynaptic potentials that are produced
simultaneously in different parts of the receptive
membrane are added, we have _______
summation.
spatial
