Asked by Kennedy Woodward on May 07, 2024
Verified
A nerve impulse is caused by
A) the movement of a sodium ion all the way from dendrite to axon tip.
B) the movement of a potassium ion all the way from dendrite to axon tip.
C) the movement of sodium ions from a dendrite to an axon tip and the movement of potassium ions from the an axon tip to a dendrite.
D) a change in the difference in positive and negative ions on the outer and inner surfaces of the neuron membrane, a change that opens adjacent channels and propagates its flow.
E) a change in the difference in sugar molecules on the outer and inner surfaces of the neuron membrane that opens adjacent channels.
Nerve Impulse
Electrical signal that conveys information along the length of a neuron.
Neuron Membrane
The lipid bilayer that encloses the cytoplasm of neurons, crucial for nerve impulse transmission.
Potassium Ions
Essential positive ions (K+) within cellular processes, crucial for nerve function, muscle contraction, and maintaining fluid and electrolyte balance.
- Comprehend the transmission of nerve impulses through axons.
Verified Answer
SO
Sandra Odoms-MarkhamMay 11, 2024
Final Answer :
D
Explanation :
A nerve impulse is caused by a change in the difference in positive and negative ions on the outer and inner surfaces of the neuron membrane, which causes adjacent ion channels to open and allow the flow of ions, propagating the impulse down the axon. Sodium and potassium ions are involved in this process, but they do not move all the way from dendrite to axon tip.
Learning Objectives
- Comprehend the transmission of nerve impulses through axons.