Q: Which equation represents the activity of the sodium-potassium pump?

$$3 \text{Na}^+ \text{out} : 2 \text{K}^+ \text{in}$$

Question 1

Which of the following best describes the primary function of the nervous system?

Accepted Answer

To coordinate and integrate sensory input, motor output, and higher functions such as cognition

Question 2

Which division of the nervous system is responsible for integrating information and making decisions?

Accepted Answer

Central Nervous System (CNS)

Question 3

A neuron receives a signal at its dendrites, transmits it along its axon, and releases neurotransmitters at its axon terminals. Which regions correspond to these functions?

Accepted Answer

Receptive region, conducting region, secretory region

Question 4

Which type of glial cell is responsible for myelinating axons in the peripheral nervous system?

Accepted Answer

Schwann cell

Question 5

What is the primary reason the resting membrane potential of a neuron is negative?

Accepted Answer

Constant efflux of potassium ions through leak channels

Question 6

Which equation best represents the calculation of membrane potential using ion concentrations?

Accepted Answer

$$E_{m} = \frac{RT}{zF} \ln \left( \frac{[ion]_{outside}}{[ion]_{inside}} \right)$$

Question 7

During an action potential, which event occurs first?

Accepted Answer

Voltage-gated sodium channels open

Question 8

Which statement best describes the difference between saltatory and continuous conduction?

Accepted Answer

Saltatory conduction involves action potentials jumping between nodes of Ranvier, increasing speed

Question 9

Which of the following is NOT a function of astrocytes?

Accepted Answer

Myelinate axons in the CNS

Question 10

A patient has a loss of sensation in their skin but normal muscle function. Which neuron type is most likely affected?

Accepted Answer

Sensory (afferent) neuron

Question 11

Which of the following best describes the absolute refractory period?

Accepted Answer

A period when no additional stimulus can produce an action potential

Question 12

Which neurotransmitter is primarily used at the neuromuscular junction?

Accepted Answer

Acetylcholine

Question 13

Which mechanism is NOT a method for terminating synaptic transmission?

Accepted Answer

Active transport of neurotransmitters into the postsynaptic neuron

Question 14

Which of the following best describes an excitatory postsynaptic potential (EPSP)?

Accepted Answer

A local potential that moves the membrane potential closer to threshold

Question 15

Which equation represents the activity of the sodium-potassium pump?

Accepted Answer

$$3 	ext{Na}^+ 	ext{out} : 2 	ext{K}^+ 	ext{in}$$

Question 16

Which of the following factors increases the speed of action potential conduction?

Accepted Answer

Larger axon diameter and presence of myelin

Question 17

Which type of synapse allows for nearly instantaneous, bidirectional transmission of action potentials?

Accepted Answer

Electrical synapse

Question 18

Which process describes the summation of postsynaptic potentials from multiple presynaptic neurons occurring simultaneously?

Accepted Answer

Spatial summation

Question 19

Which structural class of neuron is most commonly found in the CNS?

Accepted Answer

Multipolar neuron

Question 20

Which glial cell acts as a phagocyte in the CNS, removing debris and pathogens?

Accepted Answer

Microglia

Neurophysiology: Structure and Function of the Nervous System

Study Guide - Practice Questions

Study Guide - Flashcards