Module 2.1 Quiz

Ace your homework & exams now with Quizwiz!

What determines whether a neuron has an action potential?​

​the combined effects of EPSPs and IPSPs

Spatial summation refers to ____.​

multiple weak stimulations that occur at the same time

What do temporal summation and spatial summation have in common?​

​Both enable a reflex to occur in response to weak stimuli.

The primary difference between an EPSP and an action potential is that ____.​

​EPSPs are subthreshold events that decay over time and space

Which statement is TRUE about the spontaneous firing rates of neurons?​

​EPSPs increase the frequency.

Which statement is TRUE of EPSPs?​

​They decay over time and space.

On the basis of what evidence were the properties of synapses first inferred?​

​behavioral observations

Which process will most likely result in an IPSP?​

​chloride ions entering the cell

An EPSP is to ____ as an IPSP is to ____.​

​depolarization; hyperpolarization

When a vertebrate animal contracts the flexor muscles of a leg, it relaxes the extensor muscles of the same leg. Sherrington considered this evidence for the existence of ____.​

​inhibitory messages

In a reflex arc, the coordination between contraction of certain muscles and relaxation of others is mediated by ____.​

​interneurons

The "spontaneous firing rate" of a neuron refers to ____.​

​its rate of producing action potentials even when it is not stimulated

Which pattern of post-synaptic excitation will most likely result in an action potential?​

​rapid sequence of EPSPs

Temporal summation most likely occurs with ____.​

​rapid succession of subthreshold excitation

To measure temporal summation in single cells, researchers ____.​

​record depolarizations of the postsynaptic neuron

Even at rest, most neurons have periodic production of action potentials, known as the ____.​

​spontaneous firing rate

A certain weak stimulus produces no reflexive response, but a rapid repetition of that stimulus may produce such a response. What is this phenomenon called?​

​temporal summation

What causes an EPSP?​

​the opening of sodium channels

Sherrington deduced that transmission at a synapse must be slower than conduction along an axon. This was based on what kind of evidence?​

​the speed of reflexive responses

Temporal summation is to ____ as spatial summation is to ____.​

​time; location


Related study sets

Axial Skeleton (infant skull), Skull Skeletal Structure, Bone structure long bone, Compact Bone, Types of Bones, Epidermal Strata (5 Layers), Integumentary System

View Set

Chapter 17, Chapter 13: Labor and Birth Processes NCLEX, Chapter 16: Labor and Birth Processes, Chapter 16, Chapter 15: Fetal Assessment during Labor, Chapter 15, Chapter 14, Chapter 12: High Risk Perinatal Care: Gestational Conditions NCLEX, Ch 11 -…

View Set

Personal computer hardware- Midterm exam

View Set

Chapter 24 - consumer protection

View Set