a.
Match the parts of a neuron with their functions
Cell body
Axon
Dendrites
Synapse
Group of answer choices
Part of the neuron responsible for detecting incoming signals
from sensory cells or other neurons
The connection point between a neuron and its target
cell
Sends electrical signals in the form of action potentials in one
direction
Location of the nucleus, responsible for basic metabolic
functions
b.
Action potential terms: match with function.
Voltage-gated potassium (K+) channels
Refractory period
Voltage-gated Na+ (sodium) channels
Na/K Pump
Group of choices
Open at the peak of depolarization and serve to repolarize
the cell
Serves to restore resting potential after an action
potential has occurred
The time during which a second action potential cannot be
triggered
Open when the threshold voltage is reached
c.
Which of the following can serve as an "effector" in
physiological feedback loops in animals?
a gland
brain
spinal cord
olfactory receptor (smell receptor)
d.
For a neuron that is transmitting an action potential
down the length of its axon, select all the correct
statements.
Schwann cells, a special type of glial cell, insulate axons and
hence increase the speed at which an electrical signal is
transmitted along a neuron in the peripheral nervous system
In the sequence of an action potential being triggered, the
voltage-gated K+ channels open prior to the voltage-gated Na+
channels
When an action potential is triggered, the opening of the
voltage-gated Na+ channels serves to depolarize the cell.
Excitatory post-synaptic potentials can sum together to
reach the threshold voltage, which will then trigger an action
potential.
Action potentials represent brief, local positive feedback
loops.