What will happen when ligand gated sodium channels open on a neuron? What will enter/exit the cell? Will it help the cell to depolarize or hyperpolarize? Will it lead to EPSP or IPSP?

What is responsible for action potentials propagating in one direction? The inactivation of voltage gated sodium channels The sodium potassium pump and the potassium leak channels The inactivation of voltage gated potassium channels The inactivation of ligand gated sodium channels The inactivation of ligand gated potassium channels

You find a neuron whose resting potential is -90mV. Which of the following are likely to be true? (select all that apply) Voltage-gated sodium channels are closed The neuron is fully permeable to sodium The neuron is permeable to potassium The neuron is hyperpolarized

What happens if a potassium channel opened before sodium channels during the action potential process?

The action potential is split into 4 parts (A-D). For each part, 1. Describe what stimulated the channel responsible for this part, 2. what is the likely ion that is moving and 3. explain which direction the ion had to move to create the measured membrane potential.

What is the importance of the sodium-potassium pump in neuron function? What do you think would be the effect on action potentials if the sodium-potassium pump stopped functioning due to the lack of ATP?

What causes depolarization of a neuron membrane potential?

Match each type of membrane potential to its definition: The membrane potential at which voltage gated sodium channels open. The membrane potential that triggers the action potential. Threshold potential Change in membrane potential that may or may not reach threshold and that may be depolarizing or hyperpolarizing. Rapid, strong depolarization followed by immediate repolarization. This potential is self-renewing if the right ion channels are nearby. Answer Options: Resting Potential, Threshold Potential, Graded Potential, Action Potential

If a potassium channel is held open for even longer, leading to an even bigger hyperpolarization of the cell what will happen in an afferent neuron? action potentials will have a larger amplitude  action potentials will have a small amplitude less frequent action potentials in the neuron  more frequent action potentials in the neuron

Aerobic, or low-intensity, muscle training eventually results in A more muscle fibers more capillaries C more glycogen D more myoglobin E B and D are correct B