I am studying for my final exam, and I am trying to test my knowledge through th

Question

I am studying for my final exam, and I am trying to test my knowledge through this worksheet. I really need help it. I want to make sure if my answers are correct or not.
Fill in the blanks in the following description of nerve impulse transmission and propagation. Overview/ Summary: At rest, when no impulse is traveling along a neuron, there is a relative difference in electrical potential between the inside of the neuron membrane and the outside. Specifically, there is a charge just inside the neuron membrane, as there are morecharged proteins and ions on the inside. Just outside the neuron membrane there is acharge. and there are more ions outside the membrane. At this point, what exists is called the ". The membrane is said to be This potential is also established by the presence ofchannels which allow outside of the membrane. With sufficient ions to flow out of the neuron contributing to the charge on the the permeability of the neuron membrane will change ions will move across the membrane into the neuron, causing the polarity which existed at and as it proceeds down rest to change. This change of polarity is called the length of a neuron, we say that an Chemical transmission of neuron impulse from one neuron to another: When an action potential reaches the extreme end of a neuron, specifically the " is being propagated. , it opens specific -gated ion channels which allow _ions to enter the neuron; these ions will then interact with proteins. These interacting chemicals will help synaptic chemicals generally called (which contain ), move to the neuron's membrane. The synapticwill fuse with the membrane and release their chemical contents into the synaptic cleft. These chemicals will diffuse across the to the next neuron's membrane, and will bind to special receptors on this membrane. These chemicals can be either (will cause POLARIZATION, also called an, by opening (will cause POLARIZATION, also called an , by opening or channels).

Explanation / Answer

At rest, when no impulse is travelling along a neuron, there is a relative difference in electrical potential between the inside of the neuron membrane and the outside. Specifically, there is a negative charge just inside the neuron membrane, as there are more negatively charged proteins and negative ions on the inside. Just outside. Just outside the neuron membrane, there is a positive charge, and there are more positive ions outside the membrane. At this point, what exists is called the resting membrane potential. The membrane is said to be at rest. The potential is also established by the presence of potassium channels which allow potassium ions to flow out of the neuron contributing to the positive charge on the outside of the membrane.

With sufficient threshold potential, the permeability of the neuron membrane will change, and sodium ions will move across the membrane into the neuron, causing the polarity which existed at rest to change. This change of polarity is called depolarization, and as it proceeds down the length of a neuron, we say that an action potential is being propagated.

Chemical transmission of neuron impulse from one neuron to another:

When an action potential reaches the extreme end of a neuron, specifically the pre-synaptic knob, it opens calcium ion voltage-gated channels which allow calcium ions to enter the neuron; these ions will then interact with acetylcholine vesicle proteins. These interacting chemicals will help synaptic vesicles (which contain chemicals generally called neurotransmitters), move to the neuron’s terminal membrane or pre-synaptic membrane. The synaptic vesicles will fuse with the membrane and release their chemical contents into the synaptic cleft. These chemicals will diffuse across the synapse to the next neuron’s membrane and will bind to spatial receptors o this membrane. These chemicals can either be activating (will cause decreased polarization, also depolarization, by opening sodium channels or inhibitory (will cause increased polarization, also called hyperpolarization, by opening potassium channels)

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