The means of travel within and between neurons is different because:

A. electrical signals move impulses within the neuron, while chemical signals move the impulses between neurons.
B. chemical signals move the impulses within the neuron, while electrical signals move impulses between neurons.
C. chemical signals initiate all messages in the dendrite, but change to electrical in the axon.
D. the axon will not receive electrical signals, but the chemical signal pushes the impulse.

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Give your choice.

C. chemical signals initiate all messages in the dendrite, but change to electrical in the axon.

To determine the correct answer, we need to understand the different modes of communication within and between neurons.

In neurons, signals are transmitted from one part of the cell to another. Within a single neuron, the means of travel is through electrical impulses. This is because neurons are equipped with specialized structures called ion channels that allow for the movement of charged particles, such as sodium and potassium ions, across the cell membrane. When these ions flow in and out of the neuron, they create an electrical potential difference, known as an action potential, which allows for the transmission of signals along the length of the neuron.

On the other hand, when signals need to be transmitted from one neuron to another, the means of travel is through chemical signals. When an action potential reaches the end of a neuron, known as the presynaptic terminal, it triggers the release of chemical messengers called neurotransmitters into the synapse, which is the small gap between neurons. These neurotransmitters then bind to specific receptors on the receiving neuron, initiating a cascade of events that eventually lead to the transmission of the signal to the next neuron.

With this understanding, we can now evaluate the answer choices:
A. Incorrect. Electrical signals move impulses within the neuron, while chemical signals move the impulses between neurons.
B. Correct. Chemical signals move the impulses within the neuron, while electrical signals move impulses between neurons.
C. Incorrect. While chemical signals do play a role in initiating messages in the dendrite, they do not change to electrical signals in the axon.
D. Incorrect. The axon does receive and transmit electrical signals in the form of action potentials. Chemical signals in the form of neurotransmitters are responsible for transmitting the impulse between neurons.

Therefore, the correct answer is B. Chemical signals move the impulses within the neuron, while electrical signals move impulses between neurons.