Q: Which equation is used to calculate the equilibrium potential for a particular ion in a neuron?

$E_{ion} = 62 \text{ mV} \left( \log \frac{[\text{ion}]_{\text{outside}}}{[\text{ion}]_{\text{inside}}} \right) $

Question 1

Which structure in a neuron is primarily responsible for receiving signals from other neurons?

Accepted Answer

Dendrites

Question 2

What is the main function of the sodium-potassium pump in neurons?

Accepted Answer

To maintain the resting membrane potential by moving Na+ out and K+ in

Question 3

Which equation is used to calculate the equilibrium potential for a particular ion in a neuron?

Accepted Answer

$E_{ion} = 62 	ext{ mV} \left( \log \frac{[	ext{ion}]_{	ext{outside}}}{[	ext{ion}]_{	ext{inside}}} ight) $

Question 4

During the rising phase of an action potential, which ion moves into the neuron?

Accepted Answer

Na+

Question 5

What is the effect of myelination on the speed of action potential conduction?

Accepted Answer

It increases the speed by allowing action potentials to jump between nodes of Ranvier

Question 6

Which type of glial cell forms the myelin sheath in the peripheral nervous system?

Accepted Answer

Schwann cell

Question 7

What is the primary function of the axon hillock in a neuron?

Accepted Answer

To integrate incoming signals and initiate action potentials

Question 8

Which of the following best describes the process of saltatory conduction?

Accepted Answer

Action potentials jump from one node of Ranvier to the next

Question 9

What is the role of ligand-gated ion channels in synaptic transmission?

Accepted Answer

They open in response to neurotransmitter binding, generating postsynaptic potentials

Question 10

Which neurotransmitter is involved in muscle stimulation, memory formation, and learning?

Accepted Answer

Acetylcholine

Question 11

A neuron at resting potential has a high concentration of which ion inside the cell?

Accepted Answer

K+

Question 12

Which of the following is a correct description of an excitatory postsynaptic potential (EPSP)?

Accepted Answer

A depolarization that brings the membrane potential toward threshold

Question 13

What is the effect of opening many K+ channels in a neuron?

Accepted Answer

Hyperpolarization

Question 14

Which process describes the addition of multiple EPSPs from different synapses on the same postsynaptic neuron?

Accepted Answer

Spatial summation

Question 15

Which of the following is NOT a function of glial cells?

Accepted Answer

Transmitting action potentials

Question 16

Which division of the autonomic nervous system is responsible for the 'fight-or-flight' response?

Accepted Answer

Sympathetic

Question 17

Which brain region is most important for the storage of emotional memories?

Accepted Answer

Amygdala

Question 18

What is the main function of the motor cortex in the cerebral cortex?

Accepted Answer

Controlling voluntary movement

Question 19

Which neurotransmitter is NOT stored in cytoplasmic vesicles but is synthesized on demand?

Accepted Answer

Nitric oxide (NO)

Question 20

Which process is described by the ability of the nervous system to be modified after birth, such as strengthening or weakening signaling at a synapse?

Accepted Answer

Neural plasticity

Neurons, Synapses, and Signaling: Structure and Function of the Nervous System

Study Guide - Practice Questions

Study Guide - Flashcards