The signal that crosses a synapse is stopped when the
A) receiving cell runs out of sodium and is no longer able to respond to the stimulus.
B) receiving cell runs out of potassium and is no longer able to respond to the stimulus.
C) neurotransmitters are enzymatically broken down or transported back to the signaling cell.
D) neurotransmitters are actively transported into glia cells.
Answer: C
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A.) water B.) carbon dioxide C.) oxygen D.) glucose
Which of the following is not a cellular activity associated with microtubules?
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a. Homo erectus b. Australopithecus afarensis c. Australopithecus africanus d. Homo sapiens e. Sahelanthropus tchadensis
Consider the observations that a label on one head of a myosin V dimer moves in steps of 72 nm, but a label much nearer the myosin tail moves in steps of 36 nm
Discuss how these observations support a hand-over-hand mechanism rather than an inchworm mechanism of myosin V motility on an actin filament. What will be an ideal response?