BIO 012 Lecture Notes - Lecture 6: Chemical Synapse, Myelin, Oligodendrocyte
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3. Which of the following is TRUE about a motor neuron?
It passes information to another motor neuron. | ||
It passes information to another neuron. | ||
It stimulates cells associated with muscles or glands. | ||
It cannot generate an action potential. |
2. Choose the immediate event that needs to occur for a nerve to fire an action potential.
Voltage-gated potassium ion channels need to open. | ||
A threshold potential will need to be reached. | ||
Depolarization will need to be happen. | ||
Voltage-gated sodium ion channels need to close. |
1. Choose the TRUE statement with respect to axons and/or dendrites.
Dendrite is the location that a neurotransmitter moves into the synamptic cleft. | ||
Action potentials travel along the axon of a neuron. | ||
A neuron will typically have more axons than dendrites. | ||
More than one is correct |
Which of the following statements is FALSE? (choose one)
A. | Voltage-gated sodium (Na+) channels open in the dendrites and cell body during a local, graded potential. |
B. | During repolarization, potassium ions are leaving the cell (K+ is diffusing out of the cell), and the inside of the cell becomes more negative |
C. | If someone damaged an efferent motor neuron, they could feel pain, but not respond to move away from the pain |
D. | Myelin serves as electrical insulation and increases the speed at which an action potential travels along the axon |
E. | Movement of ions can be excitatory (if sodium ligand-gated channels bind the neurotransmitter), or inhibitory (if potassium ligand-gated channels bind the neurotransmitter) |