ANATOMY & PHYSIOLOGY: THE UNITY OF FORM
9th Edition
ISBN: 9781264489251
Author: SALADIN
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 19, Problem 9WWTS
Unlike skeletal muscle, cardiac muscle cells do not have a stable resting membrane potential.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
In cardiac muscle, which ion serves both to depolarize the cells and as the essential link to myocyte contraction (the troponin/tropomyosin part)?
a-Na+
b-Ca+
c-Ca2+
d-Cl-
A significant structural feature in the microscopic studyof cardiac muscle cells is the presence of gap junctionsbetween neighboring cells. Why are these junctions soimportant?
Why should mitochondria be larger and more abundant in cardiac muscle than in skeletal muscle?
Chapter 19 Solutions
ANATOMY & PHYSIOLOGY: THE UNITY OF FORM
Ch. 19.1 - Prob. 1AYLOCh. 19.1 - Names of the great vessels directly connected to...Ch. 19.1 - Prob. 3AYLOCh. 19.1 - Prob. 4AYLOCh. 19.2 - Prob. 3BYGOCh. 19.2 - Prob. 1AYLOCh. 19.2 - Relative thickness of the myocardium in different...Ch. 19.2 - Structure and function of the fibrous skeleton of...Ch. 19.2 - Prob. 4AYLOCh. 19.2 - Names and synonyms for all four valves of the...
Ch. 19.2 - Prob. 6AYLOCh. 19.2 - Prob. 7AYLOCh. 19.2 - Prob. 8AYLOCh. 19.2 - Prob. 9AYLOCh. 19.2 - Prob. 10AYLOCh. 19.2 - Anatomy of the major veins that drain the...Ch. 19.3 - Prob. 1AYLOCh. 19.3 - Prob. 2AYLOCh. 19.3 - Components, of the cardiac conduction system and...Ch. 19.4 - Prob. 1AYLOCh. 19.4 - Prob. 2AYLOCh. 19.4 - The mechanism that causes cells of the SA node to...Ch. 19.4 - The spread of excitation through the atria, AV...Ch. 19.4 - Prob. 5AYLOCh. 19.4 - Prob. 6AYLOCh. 19.4 - Prob. 7AYLOCh. 19.5 - Prob. 1AYLOCh. 19.5 - Prob. 2AYLOCh. 19.5 - Prob. 3AYLOCh. 19.5 - Prob. 4AYLOCh. 19.5 - In each phase of the cardiac cycle, which chambers...Ch. 19.5 - The typical duration, in seconds, of atrial...Ch. 19.5 - Prob. 7AYLOCh. 19.5 - Prob. 8AYLOCh. 19.6 - Prob. 29BYGOCh. 19.6 - Prob. 30BYGOCh. 19.6 - The definition of cardiac output (CO); how it can...Ch. 19.6 - Prob. 2AYLOCh. 19.6 - Prob. 3AYLOCh. 19.6 - Prob. 4AYLOCh. 19.6 - Prob. 5AYLOCh. 19.6 - Mechanisms by which sympathetic and...Ch. 19.6 - Prob. 7AYLOCh. 19.6 - Prob. 8AYLOCh. 19.6 - Mechanisms by which epinephrine and...Ch. 19.6 - Prob. 10AYLOCh. 19.6 - Prob. 11AYLOCh. 19.6 - Prob. 12AYLOCh. 19.6 - Prob. 13AYLOCh. 19.6 - Prob. 14AYLOCh. 19.6 - Conditions that increase afterload: the effect of...Ch. 19.6 - Prob. 16AYLOCh. 19.6 - Why stroke volume may be unusually high and...Ch. 19.6 - Prob. 18AYLOCh. 19.6 - Prob. 19AYLOCh. 19.6 - Prob. 20AYLOCh. 19.6 - Prob. 21AYLOCh. 19 - The cardiac conduction system includes all of the...Ch. 19 - Prob. 2TYRCh. 19 - Assume that one ventricle of a childs heart has...Ch. 19 - Prob. 4TYRCh. 19 - Prob. 5TYRCh. 19 - Prob. 6TYRCh. 19 - The atria contract during a. the first heart...Ch. 19 - Prob. 8TYRCh. 19 - Prob. 9TYRCh. 19 - Prob. 10TYRCh. 19 - The contraction of any heart chamber is called and...Ch. 19 - Prob. 12TYRCh. 19 - The circumflex artery travels in a groove called...Ch. 19 - Prob. 14TYRCh. 19 - Electrical signals pass quickly from one...Ch. 19 - Repolarization of the ventricles produces the of...Ch. 19 - Prob. 17TYRCh. 19 - Prob. 18TYRCh. 19 - Blood in the heart chambers is separated from the...Ch. 19 - The Frank-Starling law of the heart explains why...Ch. 19 - atrio-Ch. 19 - brady-Ch. 19 - Prob. 3BYMVCh. 19 - Prob. 4BYMVCh. 19 - lun-Ch. 19 - Prob. 6BYMVCh. 19 - Prob. 7BYMVCh. 19 - Prob. 8BYMVCh. 19 - Prob. 9BYMVCh. 19 - Prob. 10BYMVCh. 19 - Prob. 1WWTSCh. 19 - One-way valves prevent atrial systole from driving...Ch. 19 - Prob. 3WWTSCh. 19 - Prob. 4WWTSCh. 19 - Prob. 5WWTSCh. 19 - Prob. 6WWTSCh. 19 - If all nerves to the heart were severed, the heart...Ch. 19 - If the two pulmonary arteries were clamped shut,...Ch. 19 - Unlike skeletal muscle, cardiac muscle cells do...Ch. 19 - An electrocardiogram is a tracing of the action...Ch. 19 - Prob. 1TYCCh. 19 - Prob. 2TYCCh. 19 - Becky, age 2, was born with a hole in her...Ch. 19 - Prob. 4TYCCh. 19 - Prob. 5TYC
Additional Science Textbook Solutions
Find more solutions based on key concepts
CAUTION How can evolutionary fitness be estimated? a. Document how long individuals survive. b. Count the numbe...
Biological Science (6th Edition)
What is the difference between histology and radiography?
Human Anatomy (8th Edition)
Some species of bacteria that live at the surface of sediment on the bottom of lakes are capable of using eithe...
Biology: Life on Earth with Physiology (11th Edition)
1. The correct sequence of levels forming the structural hierarchy is
A. (a) organ, organ system, cellular, che...
Human Anatomy & Physiology (Marieb, Human Anatomy & Physiology) Standalone Book
What are the cervical and lumbar enlargements?
Principles of Anatomy and Physiology
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
- Why is the plateau phase important in cardiac muscle cells?arrow_forwardSome endocrine tumors secrete a hormone that leads to elevation of extracellular fluid Ca21 concentrations. How might this affect cardiac muscle?arrow_forwardWhy would cardiac muscle cells and some smooth muscle cells.continue to contract even when their nerve supply has been removed or severed?arrow_forward
- Unlike skeletal muscle, cardiac muscle doesn’t undergo tetany. Explain how this is achieved and why is this necessary?arrow_forwardDetermine whether the following description is common to skeletal muscle, cardiac muscle or both skeletal and cardiac muscle. increase in tension during contraction of the muscle organ involves recruitment of other cells is primarily under the control of the autonomic nervous system all cells depolarize and contract during every contraction of the muscle organ different neurotransmitters can increase or decrease the rate of contraction action potentials begin electrical depolarization by a voltage-gated Na+ channel 1. skeletal muscle 2. cardiac muscle increase in cytosolic 3. skeletal muscle and cardiac muscle calcium increases tension in muscle cells prolonged depolarization is due to Ca2+ influx across the plasma membrane contraction is not under the control of hormones relaxation occurs when cytosolic calcium is reduced to resting levels increase in tension during contraction of single cells is associated with a higher frequency of action potentialsarrow_forwardHumming birds and rattlesnakes can contract and relax skeletal muscle very quickly, i.e. in 10-20 milliseconds. Which of the following steps must they have shortened to speed up contractions? more brief neuronal action potentials more brief skeletal muscle attion potentials shorter duration of calcium in the cytosol all of the abovearrow_forward
- Briefly describe one voltage-gated ion channel and two protein pumps found in the heart. In your answer, you should explain how the voltage-gated ion channel responds to voltage changes and how it controls which ions pass through the channel. For the protein pumps, be sure to describe the structure of the protein pump and any conformational changes that it goes through. Additionally, you should briefly explain the importance of each ion channel or pump for the normal functioning of the cardiac muscle.arrow_forwardWhy is the gap junctions between heart muscle cells play a relevant role in producing a regular heartbeat?arrow_forwardIf a muscle cell’s sarcoplasmic reticulum had little to no Ca2+, could the muscle cell still produce an electrical impulse, and would the muscle cell still contract? Explain.arrow_forward
- The contracting cells of the heart are a type of striated muscle that is said to work as a functional syncytium. Provide a definition for “functional syncytium” and describe important functional characteristics and cellular specializationsarrow_forwardBoth skeletal and (contractile) heart muscle cells A Have unstable resting membrane potentials B Have myosin filaments that with heads that bind to actin C Depolarize when calcium leaves through voltage-gated channels Have receptors that allow sodium to diffuse into the cell when acetylcholine binds to themarrow_forwardThe electrochemical gradient of a muscle cell at rest or its resting membrane potential is slightly negative inside the plasma membrane and slightly positive just outside the plasma membrane and has an ionic gradient of more potassium ions inside the cell and more sodium ions outside the cell. Therefore, a muscle cell at rest is said to be __________________ and has membrane potential. about to exocytose synaptic vesicles containing acetylcholine polarized experiencing an action potential about to allow an influx of potassium ions into the cell depolarizedarrow_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
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Types of Human Body Tissue; Author: MooMooMath and Science;https://www.youtube.com/watch?v=O0ZvbPak4ck;License: Standard YouTube License, CC-BY