The Na+/K+ pump is important for ________ in neurons. A) the depolarizing phase of the action potential B) the repolarizing phase of the action potential C) establishing myelination D) establishing the resting potential E) generating ATP

33 Explain how the transmission of an action potential would be impacted if voltage-gated calcium channels could not open. In your answer, explain the usual process ofhow an action potential is transmitted from one neuron to the next neuron.Answer in a sentence format.

Neurotransmitters that influence the effect of other neurotransmitters when released at the same time are called: A) major neurotransmitters B) neuromodulators C) excitatory neurotransmitters D) inhibitory neurotransmitters

3) Neurons cannot respond during the absolute refractory period because: a) the concentration gradients for Na+ and K+ are reversed. b) the cell is below its normal resting membrane potential. c) voltage-gated Na+ channel activation gates are closed. d) voltage-gated Na+ channel inactivation gates are closed.

A toxin causes neurons to fire excessively. What is a possible mechanism for this effect? A) Chloride channels are blocked. This leads to less EPSPs. B) Sodium channels are blocked. This leads to less IPSPs. C) Chloride channels are blocked. This leads to less IPSPs. D) Sodium channels are blocked. This leads to less EPSPS.

2) myelin sheaths are axons located within the central nervous system are formed by which of the following? a) oligodendrocytes b) microglia c) Schwann cells d) Astrocytes

In a neuron at rest, there is a difference in the electrical charge across the cell membrane, with the inside of the cell being more negative than the outside. This is primarily due to: a) secondary active transport of Na+ b) the difference in the concentrations of Na+ inside and outside of the cell c) simple diffusion of K+ ions  d) leak channels increasing the permeability of the membrane to K+ ions e) facilitated diffusion of Na+ ions

Which of the following occurs during synaptic transmission? Select ALL that apply A) vesicles filled with neurotransmitter are released into the synapse B) an action potential travels through a neuron like a wave C) neurotransmitter binds to receptors on the sending neuron D) neurotransmitter binding to a receptor triggers the opening of an ion channel E) ions enter the receiving neuron's dendrites

Refer to the graph showing the course of an action potential. Which of the numbered points along the graph represent the time when voltage-gated potassium channels are first activated? a) 1 b) 2 c) 3 d) 4 e) 5

Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse? a) they inhibit the action potential causing it to stop b) Calcium channels have no role in this process c) by allowing calcium to exit the cell, they promote the propagation of action potential across the synapse by creating depolarization d) by blocking calcium entrance, they mediate the contraction of presynaptic axon to facilitate movement e) when they open, calcium enters the presynaptic terminal, promoting fusion of neurotransmitter vesicles with presynaptic membrane, and release of neurotransmitters to the synaptic cleft