The graph shows the action potential produced in the axon of a neuron before (dotted purple line) and after (solid red line) the neuron was exposed to a chemical agent. Based on the change in the action potential trace, what was the most direct effect that the chemical agent had on the neuron?
A.
B.
C.
D.
Correct. See Key Concept 44.2 Neurons Generate and Transmit Electric Signals
Incorrect. See Key Concept 44.2 Neurons Generate and Transmit Electric Signals
Activity 44.1 Quiz
Refer to the graph below.
The graph shows the action potential produced in the axon of a neuron before (dotted purple line) and after (solid red line) the neuron was exposed to a chemical agent. Based on the change in the action potential trace, how might the chemical agent have affected the neuron?
A.
B.
C.
D.
Correct. See Key Concept 44.2 Neurons Generate and Transmit Electric Signals
Incorrect. See Key Concept 44.2 Neurons Generate and Transmit Electric Signals
Activity 44.1 Quiz
Tetrodotoxin (TTX) is a neurotoxin that blocks voltage-gated Na+ channels. What will happen in an organism that ingests TTX?
A.
B.
C.
D.
Correct. See Key Concept 44.3 Neurons Communicate with Other Cells
Incorrect. See Key Concept 44.3 Neurons Communicate with Other Cells
Activity 44.1 Quiz
Refer to the table below.
A biologist tests four different compounds for their effects on various stages of synaptic transmission by a neuron. In her tests, the biologist observes the neuron’s ability to carry out certain functions in response to electrical stimulation of the neuron. The table above summarizes her results. A checkmark indicates normal function. Based on these results, which compound would be classified as a sodium channel blocker and which would be classified as a voltage-gated calcium channel blocker?
A.
B.
C.
D.
Correct. See Key Concept 44.3 Neurons Communicate with Other Cells
Incorrect. See Key Concept 44.3 Neurons Communicate with Other Cells
