ch 4 quiz Word Scramble
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| Question | Answer |
| A change in membrane potential in which the charge is becoming less negative than resting potential is called | Depolarization |
| Ependymal cells | Secrete cerebrospinal fluid in the ventricles of the brain |
| What is one of the three functions of the cerebrospinal fluid in the human body? | Mechanical protection of the central nervous system |
| Which type of potential results from the opening of Na+ channels? | Excitatory postsynaptic potential |
| An action potential results in a change in the membrane potential of a nerve cell from resting potential if the potential changes to | -55 mV |
| During the rising phase of an action potential, | Voltage-gated Na+ channels open. |
| Exocytosis of neurotransmitter into the synaptic cleft is triggered by an influx of ______ in response to the arrival of an action potential in the axon terminal. | Ca2 |
| One of the major inhibitory neurotransmittors in the CNS is | gamma amino butyric acid (GABA) |
| When a nerve fiber is polarized, the concentration of | sodium ions is higher on the outside of its membrane and potassium ions is higher on the inside. |
| An infant's responses to stimuli are coarse and undifferentiated because its nerve fibers | are not completely myelinated |
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