Nervous 1
Name of support cells in nervous tissue.
neuroglia
Name of cells in nervous tissue where action potentials occur
Type of channel that can initiate an action potential (be specific)
voltage-gated Na+ channel
Part of a neuron where vesicles containing neurotransmitters can be found
axon terminii (terminals)
Place in a neuron where ligand/chemically-gated ion channels are typically found
dendrites
Part of a neuron where action potentials start
axon hillock
Part of a neuron where graded/local potentials end
axon hillock
What term would be used to describe the following change in membrane potential. (
-70mV (RMP) to -75mV
hyperpolarization
What is the name of the cell that is an effector at the neuromuscular junction?
skeletal muscle cell (fiber)
-70mV (RMP) to -54mV
depolarization
In an action potential, which channels open to cause repolarization?
voltage-gated K+ channels
In an action potential, which channels open to cause hyperpolarization?
voltage-gated K+ channels
In an action potential, which channels inactivate after opening?
voltage-gated Na+ channels
Where is a higher concentration of Na+ found?
outside of the cell
Where is a higher concentration of K+ found?
inside of the cell
What term could be used to describe the following change in membrane potential?
-70mV (RMP) to 0mV
depolarization
What channel (be specific) opens to cause vesicles containing neurotransmitters to fuse with the cell membrane?
voltage-gated Ca2+ channels
What is the name of the neurotransmitter released from motor neurons?
acetylcholine
What type of neuron would you find if many inputs need to be integrated (e.g., in parts of the brain)?
multipolar neuron
What type of channel is the acetylcholine receptor?
Ligand/chemically-gated Na+ channel
What is the name of the presynaptic cell at the neuromuscular junction?
motor neuron
What is the name of the space through with a NT must diffuse?
synaptic cleft
What structure can surround parts of an axon and cause action potentials to be faster?
myelin
What types of channels are important for establishing the resting membrane potential?
leakage channels
What types of cells myelinate CNS axons?
oligodendrocytes