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...

Physiology: Action Potential and ECG Tracing

18 Questions

0 Views

Physiology: Action Potential and ECG Tracing

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 period during which an action potential cannot be initiated?

Ventricular repolarization

Relative refractory period

Atrial depolarization

Absolute refractory period (correct)

What is the normal sequence of events on an ECG tracing?

QRS complex, P wave, T wave

P wave, QRS complex, T wave (correct)

T wave, QRS complex, P wave

P wave, T wave, QRS complex

What is the intrinsic rate of the Sinoatrial node?

60-100 bpm (correct)

20-40 bpm

100-120 bpm

40-60 bpm

Which wave on the ECG tracing represents ventricular repolarization?

T wave Signup and view all the answers

During which phase of the cardiac action potential does the rapid depolarization occur?

Phase 0 - P wave Signup and view all the answers

What is the term for the return of an abnormal heartbeat to a normal rhythm?

Cardioversion Signup and view all the answers

What is the function of the Bundle of His?

To transmit cardiac action potentials from the AV node to the Purkinje fibers Signup and view all the answers

What is the period during which an action potential can be initiated with a larger than normal stimulus?

Relative refractory period Signup and view all the answers

What is the term for the process by which the blood stops bleeding after an injury?

Hemostasis Signup and view all the answers

What is the role of the Atrioventricular node in the cardiac conduction system?

To pause the electrical impulse to allow action potential to spread across atria for coordinated contraction Signup and view all the answers

During which phase of the cardiac action potential does the increase in Ca++ occur?

Phase 2 - ST segment Signup and view all the answers

What is the intrinsic rate of the Purkinje fibers?

20-40 bpm Signup and view all the answers

What is the role of von Willebrand factor in platelet plug formation?

Binding platelet receptors to the vessel wall Signup and view all the answers

What is the purpose of the intrinsic pathway in blood coagulation?

To initiate clotting in the circulation Signup and view all the answers

What is the role of ADP and TXA2 in platelet plug formation?

Attracting additional platelets to the site of injury Signup and view all the answers

What is the purpose of the prothrombin time (PT) test?

To measure the time it takes for blood to clot via the extrinsic pathway Signup and view all the answers

What occurs during clot retraction?

The edges of the injury are pulled together with actin and myosin Signup and view all the answers

What is the result of clot retraction?

The squeezing of plasma out of the clot Signup and view all the answers