Marcus is conducting a squid axon electrophysiology experiment with Dr. Flores. While monitoring a recording electrode placed within a squid axon, Marcus reports to Dr. Flores that the neuron is in a refractory period. What does this mean?
a. The cell is hyperpolarized and another action potential is unlikely or impossible.
b. The cell is depolarized and cannot fire another action potential.
c. The cell is hyperpolarized and is getting ready to fire a larger action potential.
d. The cell is depolarized and is getting ready to fire a larger action potential.
ANSWER:
a
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a. it provides a perfect copy of the physical stimulus, for example, a visual image that accurately represents the words on a page. b. it demonstrates that there is a clear-cut limit to the number of items we can store for a short time. c. it is the first process that occurs after the stimulus has entered long-term memory. d. it keeps some items active, so that we can use these items when we are working on a relevant task.
What causes hydrocephalus?
A. Poorly developed skull bones in an infant B. Interruption of blood flow to the brain around the time of birth C. Obstruction in the flow of cerebrospinal fluid D. Damage to one of the cranial nerves
Kara is extremely sensitive to social feedback. She most likely has a(n):
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With any t test, independent or paired, the loss of degrees of freedom
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