Nervous System - Chapter Review

<p>Metabotropic receptors involve a series of intracellular events, while ionotropic receptors directly open ion channels (C)</p> Signup and view all the answers

<p>To provide a space for the diffusion and binding of neurotransmitters, facilitating chemical communication between neurons (A)</p> Signup and view all the answers

<p>A stronger stimulus will cause a larger amplitude of the Action Potential. (B)</p> Signup and view all the answers

<p>It is the point where the decision to fire an action potential is made. (A)</p> Signup and view all the answers

<p>To isolate the axon, increasing the speed of action potential conduction by allowing it to jump between nodes of Ranvier. (A)</p> Signup and view all the answers

<p>It will cause the membrane potential to become more negative, decreasing the likelihood of an action potential. (D)</p> Signup and view all the answers

<p>They increase the likelihood of an action potential by making the neuron more positive. (C)</p> Signup and view all the answers

<p>To reduce the likelihood of an action potential being fired by the postsynaptic neuron. (D)</p> Signup and view all the answers

<p>Action potential propagates down the axon, presynaptic neuron releases neurotransmitters, neurotransmitters bind to receptors on the postsynaptic neuron. (D)</p> Signup and view all the answers

<p>The concentration gradient pushes ions from areas of high concentration to areas of low concentration, but only if the electrical gradient is also favorable. (D)</p> Signup and view all the answers

<p>To generate action potentials by integrating incoming signals from dendrites and cell body (A)</p> Signup and view all the answers

<p>EPSPs and IPSPs are both generated when a neurotransmitter binds to a postsynaptic receptor, but EPSPs cause depolarization while IPSPs cause hyperpolarization. (D)</p> Signup and view all the answers

<p>Synaptic inputs closer to the axon hillock have a greater influence on the generation of action potentials than those farther away, due to the passive decay of electrical signals. (C)</p> Signup and view all the answers

<p>Because their amplitude is proportional to the strength of the stimulus that triggered them, allowing for coding of signal intensity. (A)</p> Signup and view all the answers

<p>Spatial summation, where multiple synaptic inputs occurring simultaneously at different locations on the neuron are combined. (C)</p> Signup and view all the answers

A junction where neurons communicate with each other.

Processes occurring before neurotransmitter release at the synapse.

Attachment of neurotransmitters to receptor sites on the postsynaptic cell.

Receptors that open ion channels directly when binding with neurotransmitters.

Receptors that initiate a chain of reactions leading to indirect ion channel opening.

The process where action potentials jump between nodes of Ranvier on myelinated axons, increasing conduction speed.

A graded potential that makes a neuron more likely to fire an action potential.

A graded potential that makes a neuron less likely to fire an action potential.

The process where multiple inputs from the same source over time combine to affect the neuron's potential.

The process where inputs from multiple sources at the same time combine to affect the neuron's potential.

A rapid rise and fall in membrane potential due to Na+ and K+ ion movements.

The phase where Na+ ions enter the neuron and reduce the negative charge inside.

The phase where K+ ions exit the neuron, restoring membrane potential towards resting level.

The state where the membrane potential becomes more negative than the resting potential after K+ exits.

The time after an action potential when it is difficult to trigger another one.

The minimum membrane potential required to initiate an action potential.

The action potential either occurs fully or not at all, regardless of stimulus strength.