Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

Nerve and Muscle Fibre Response to Stimuli

17 Questions

0 Views

Nerve and Muscle Fibre Response to Stimuli

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary condition required for the generation of an action potential?

Presence of chemically regulated gated channels

Presence of voltage-gated Na+ and K+ channels and a strong enough graded potential (correct)

Mechanical stimulation of the axon

Depolarization of the axon hillock to a threshold of -60mV

Which type of gated channel is responsible for the refractory period in a neuron?

Mechanically regulated gated channels

Voltage-gated K+ channels (correct)

Chemically regulated gated channels

Voltage-regulated gated channels

What is the direction of signal propagation in a neuron?

From the dendrites to the cell body

From the cell body to the dendrites

From the axon hillock to the synaptic knob (correct)

From the synaptic knob to the axon hillock

What is the effect of a neurotransmitter that affects K+ channels on the neuronal membrane potential?

Hyperpolarization of the membrane Signup and view all the answers

What is the primary factor that determines the degree of depolarization in a neuron?

Concentration of the neurotransmitter Signup and view all the answers

What is the minimum strength of stimulus required to generate an action potential?

The threshold potential of the neuron Signup and view all the answers

During the absolute refractory period, what is the state of the Na+ ion channels?

They are closed and cannot be opened Signup and view all the answers

What is the purpose of the refractory period in signal propagation?

To ensure that signals travel in one direction Signup and view all the answers

What is the change in potential difference during the absolute refractory period?

A decrease from +30mV to -90mV Signup and view all the answers

What is the role of the Na+K+ pump in signal propagation?

To restore the resting potential after the action potential Signup and view all the answers

What is the mechanism of continuous propagation in unmyelinated neurones?

The Na+ ions attract to the negative charge on the peripherals, causing depolarization Signup and view all the answers

What is the primary mechanism of saltatory conduction in myelinated neurons?

Ions jump between nodes of Ranvier Signup and view all the answers

What is the average conduction velocity of somatic motor neurons in humans?

80-120 meter/s Signup and view all the answers

Which type of synapse allows for bidirectional signal transmission?

Electrical synapse Signup and view all the answers

What is the name of the disease that results from the immune system attacking the myelin sheath?

Multiple Sclerosis Signup and view all the answers

What is the primary function of dopamine in the nervous system?

Inhibiting skeletal muscle tone Signup and view all the answers

What is the term for the period during which a neuron is unable to generate another action potential?

Neuronal refractory period Signup and view all the answers