ANATOMY & PHYSIOLOGY 4/E PAC 1 SEMESTER
4th Edition
ISBN: 9781265061173
Author: McKinley
Publisher: MCG CUSTOM
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 19.7, Problem 28WDYL
What is the significance of the extended refractory period in cardiac muscle?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
What is the significance of the extended refractory period in cardiac muscle?
Why is the plateau phase so critical to cardiac musclefunction?
How does the excitation-contraction coupling in skeletal muscles and in cardiac muscles differ?
Chapter 19 Solutions
ANATOMY & PHYSIOLOGY 4/E PAC 1 SEMESTER
Ch. 19.1 - Prob. 1WDYLCh. 19.1 - Prob. 2WDYLCh. 19.1 - Prob. 3WDYLCh. 19.1 - Prob. 4WDYLCh. 19.1 - Prob. 5WDYLCh. 19.2 - What is the bony structure that protects both the...Ch. 19.2 - Prob. 7WDYLCh. 19.2 - Prob. 8WDYLCh. 19.3 - Prob. 9WDYLCh. 19.3 - Prob. 10WDYL
Ch. 19.3 - Prob. 11WDYLCh. 19.3 - Prob. 12WDYLCh. 19.3 - Prob. 13WDYLCh. 19.3 - Prob. 14WDYLCh. 19.3 - Prob. 15WDYLCh. 19.3 - Prob. 16WDYLCh. 19.3 - What areas of the heart are deprived of blood when...Ch. 19.3 - Prob. 18WDYLCh. 19.4 - Prob. 19WDYLCh. 19.5 - Prob. 20WDYLCh. 19.5 - Which autonomic division is associated with the...Ch. 19.6 - Prob. 22WDYLCh. 19.6 - What is autorhythmicity? Describe how nodal cells...Ch. 19.6 - What is the path of an action potential through...Ch. 19.6 - What anatomic features slow the conduction rate of...Ch. 19.7 - In which direction does Ca2+ move in response to...Ch. 19.7 - What three electrical events occur at the...Ch. 19.7 - What is the significance of the extended...Ch. 19.7 - What events in the heart are indicated by each of...Ch. 19.8 - Pressure changes that occur during the cardiac...Ch. 19.8 - What is occurring during ventricular ejection?Ch. 19.8 - Prob. 32WDYLCh. 19.8 - Define end-diastolic volume, end-systolic volume,...Ch. 19.9 - What are the two factors that determine cardiac...Ch. 19.9 - What is the cardiac output at rest and during...Ch. 19.9 - Prob. 36WDYLCh. 19.9 - Describe the atrial reflex, which involves...Ch. 19.9 - Prob. 38WDYLCh. 19.9 - Prob. 39WDYLCh. 19.10 - What would be the path of blood flow through the...Ch. 19 - Which of the following is the correct circulatory...Ch. 19 - The pericardial cavity is located between the a....Ch. 19 - How is blood prevented from backflowing from the...Ch. 19 - ____ 4. Venous blood draining from the heart wall...Ch. 19 - _____ 5. Calcium channels in the nodal cells...Ch. 19 - ____6. Action potentials are spread rapidly...Ch. 19 - Why is it necessary to stimulate papillary muscles...Ch. 19 - ____ 8. Preload is a measure of a. stretch of...Ch. 19 - ____ 9. All of the following occur when the...Ch. 19 - ____10. What occurs during the atrial reflex? a....Ch. 19 - Prob. 11DYKBCh. 19 - Compare the structure, location, and function of...Ch. 19 - Prob. 13DYKBCh. 19 - Explain why the walls of the atria are thinner...Ch. 19 - Describe the structure and function of...Ch. 19 - Explain the general location and function of...Ch. 19 - Describe the functional differences in the effects...Ch. 19 - Prob. 18DYKBCh. 19 - List the five events of the cardiac cycle, and...Ch. 19 - Define cardiac output, and explain how it is...Ch. 19 - A young man was doing some vigorous exercise when...Ch. 19 - A young man was doing some vigorous exercise when...Ch. 19 - Prob. 3CALCh. 19 - Prob. 4CALCh. 19 - During surgery, the right vagus nerve was...Ch. 19 - Prob. 1CSLCh. 19 - Prob. 2CSLCh. 19 - Your grandfather was told that his SA node...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How is long refractory period beneficial for cardiac muscles?arrow_forwardWhy is the rate of cardiac muscle relaxation faster when a positive inotropic agent is present?arrow_forwardThe refractory period of cardiac muscle is much longer than that of skeletal muscle. Why is this a desirable functional property?arrow_forward
- How does excitation–contraction coupling in cardiac muscle resemble that of skeletal muscle? How is it different?arrow_forwardWhy does the cardiac muscle have a longer absolute refractory period compared to skeletal muscle?arrow_forwardUnlike skeletal muscle, cardiac muscle doesn’t undergo tetany. Explain how this is achieved and why is this necessary?arrow_forward
- For cardiac muscle action potentials, describe ionmovement during the depolarization, early repolarization,plateau, and final repolarization phases.arrow_forwardBriefly describe the events of excitation-contraction coupling in cardiac muscle cells.arrow_forwardHow does digitalis result in an increased contractile force of cardiac muscle?arrow_forward
- Below are drawings of three different action potentials. Two of these occur in the heart, and one occurs in skeletal muscle. Which one comes from a contractile cardiac muscle cell? A skeletal muscle cell? A cardiac pacemaker cell? For each one, state which ion is responsible for the depolarization phase and which ion is responsible for the repolarization phase.arrow_forwardBy what mechanism does the autonomic nervous system impact the contractions of cardiac muscle?arrow_forwardWhat initiates action potentials in cardiac muscle?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Anatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax College
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Anatomy & Physiology
Biology
ISBN:9781938168130
Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher:OpenStax College
The Cardiovascular System: An Overview; Author: Strong Medicine;https://www.youtube.com/watch?v=Wu18mpI_62s;License: Standard youtube license