What is the function of the axon?
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The _______ of the neuronal cell is/are found in the soma, whilethe _______ may be found throughout the cell.
Select one:
a. mitochondria; dendrites
b. dendrites; axon
c. nucleus; mitochondria
d. nucleus; dendrites
The function of the axon is to transmit the _______, generatedat the _______, to the terminals.
a. axoplasm; soma
b. action potential; axon hillock
c. action potential; dendrites
d. synaptic vesicles; axon hillock
Bottom of Form
Top of Form
The primary âinput zoneâ of the neuron is generally consideredto be the
a. soma.
b. dendrites.
c. axon.
d. axon collaterals.
In a simulation we have an unmyelinated axon that then becomes myelinated. What happens to the action potential as it moves from the unmyelinated portion to the myelinated axon segment. In particular, what is different about the rising phase? What axon properties account for this?
What happens to the action potential that began in the myelinated axon segment? Why? Discuss amplitude, velocity etc..
What is the effect of temperature on the ability of the action potential to transition into the bare axon segment? How does a change in temperature have this effect?
You have gone fishing and caught some squid. Before making delicious calamari, you dissect out the giant axon, and study it in your neurophysiology laboratory. Your piece of giant axon is 3cm long and 1mm in diameter, with λ=10μm and Ï=5ms. You place recording electrodes at 0.5cm intervals along the length of the axon. You decide to simultaneously stimulate the axon at both ends with a 1ms depolarizing current pulse. Draw a plot of membrane potential along the length of the axon 40ms after stimulation.