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...

15 Questions

0 Views

Cardiac Cycle and Heart Sounds Quiz

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 defines the four phases of the cardiac cycle?

P wave and QRS complex in the electrocardiogram

Rising and falling of the atrial pressure curve

Opening and closing of the cardiac valves (correct)

Contraction and relaxation of the heart muscles

What causes the P wave in the electrocardiogram?

Initiation of contraction of the ventricles

Spread of depolarization through the atria (correct)

Electrical depolarization of the ventricles

Spontaneous generation of an action potential in the sinus node

What initiates contraction of the ventricles in the cardiac cycle?

Closing of the cardiac valves

Rising of the atrial pressure curve

Electrical depolarization of the ventricles (correct)

Spontaneous generation of an action potential in the sinus node

Which wave in the electrocardiogram marks the onset of ventricular systole?

QRS waves Signup and view all the answers

During which phase of the cardiac cycle does the heart fill with blood?

Diastole Signup and view all the answers

What is the period of rapid ejection during ventricular contraction called?

Period of isovolumic contraction Signup and view all the answers

What causes the v wave in the atria?

Slow flow of blood into the atria from the veins during ventricular contraction Signup and view all the answers

What happens during the period of isovolumic or isometric relaxation?

The ventricular muscle relaxes while the volume remains constant Signup and view all the answers

What is the function of the A-V valves?

Prevent backflow of blood from the ventricles to the atria during systole Signup and view all the answers

What causes the c wave in the atria?

Bulging of the A-V valves backward toward the atria due to increasing pressure in the ventricles Signup and view all the answers

What causes the first heart sound?

Rapid closure of the A-V valves at the beginning of systole Signup and view all the answers

Why is the second heart sound shorter in duration than the first heart sound?

The semilunar valves vibrate for a shorter time than the A-V valves Signup and view all the answers

What is the mechanism behind the third heart sound?

Oscillation of blood initiated by inrushing blood from the atria Signup and view all the answers

How does mitral regurgitation affect heart sounds?

It causes a high-frequency blowing sound transmitted most strongly into the left atrium Signup and view all the answers

What condition creates a nozzle effect during systole, leading to intense vibration and a loud murmur?

Aortic stenosis Signup and view all the answers