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WorksheetsAction Potentials, Neurons, and Neurotransmitters
Total questions: 10
Worksheet time: 20mins
In the CNS, a neuron typically receives information from other neurons at its
axon
dendrites
Nissl bodies
nucleus
Neuroglia responsible for maintaining the blood-brain barrier are the
microglia
ependymal cells
astrocytes
oligodendrocytes
The neural cells responsible for the analysis of sensory inputs and coordination of motor outputs are
neuroglia
interneurons
sensory neurons
motor neurons
Depolarization of a neuron cell membrane will shift the membrane potential toward
0 mV
-70 mV
-90 mV
a, b, and c are correct
The primary determinant of the resting membrane potential is
the membrane permeability to sodium
the membrane permeability to potassium
intracellular negatively charged proteins
negatively charged chloride ions in the ECF
Action potentials vary in strength, depending on the intensity of the initial stimulus
True
False
A neuron that is brought closer to threshold is considered to be
facilitated
inhibited
fatigued
enabled
If the resting membrane potential is -70 mV and the threshold is -55 mV, a membrane potential of -60 mV will
produce an action potential
make it easier to produce an action potential
make it harder to produce an action potential
hyperpolarize the membrane
A graded potential
decreases with distance from the point of stimulation
spreads passively because of local currents
may involve wither depolarization or hyperpolarization
a, b, and c are correct
For an action potential to begin, an area of excitable membrane must
have its voltage-regulated gates inactivated
be hyperpolarized
be depolarized to threshold level
not be in a relative refractory period
