EBK ANATOMY & PHYSIOLOGY: THE UNITY OF
7th Edition
ISBN: 8220102796409
Author: SALADIN
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 19, Problem 8TYR
Summary Introduction
Introduction:
Cardiac muscles made of cardiomyocytes have extensive membrane-carrying potential that is essential for the heart conduction system. They undergo depolarization and repolarization by the mode of calcium channel system.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The contractile response in skeletal muscle
A. produces more work when the muscle contracts isometrically than the muscle contracts isotonically.
B. does not last as long as the action potential.
C. produces more tension when the muscle contracts isometrically than when the muscle contracts isotonically.
D. starts after the action potential is over.
E. decreases in magnitude with repeated stimulation.
Which of the following describes a similarity between cardiac and smooth muscle cells?a. An action potential always precedes contraction.b. The majority of the Ca21 that activates contraction comes from theextracellular fluid.c. Action potentials are generated by slow waves.d. An extensive system of T-tubules is present.e. Ca21 release and contraction strengths are graded
When comparing cardiac muscle cells and skeletal muscle cells,
Select one:
a. only skeletal muscle has a plateau phase in its contraction cycle.
b. both possess intercalated discs.
c. action potentials are conducted from cell to cell only in cardiac muscle.
d. both are voluntary.
e. the rate of action potential propagation is faster in cardiac muscle.
Chapter 19 Solutions
EBK ANATOMY & PHYSIOLOGY: THE UNITY OF
Ch. 19.1 - Prob. 1BYGOCh. 19.1 - Prob. 2BYGOCh. 19.1 - Prob. 1AYLOCh. 19.1 - Prob. 2AYLOCh. 19.1 - Prob. 3AYLOCh. 19.1 - Prob. 4AYLOCh. 19.2 - Prob. 3BYGOCh. 19.2 - Prob. 4BYGOCh. 19.2 - Prob. 5BYGOCh. 19.2 - Prob. 6BYGO
Ch. 19.2 - Prob. 7BYGOCh. 19.2 - Prob. 8BYGOCh. 19.2 - Prob. 9BYGOCh. 19.2 - Prob. 1AYLOCh. 19.2 - Prob. 2AYLOCh. 19.2 - Prob. 3AYLOCh. 19.2 - Prob. 4AYLOCh. 19.2 - Prob. 5AYLOCh. 19.2 - Prob. 6AYLOCh. 19.2 - Prob. 7AYLOCh. 19.2 - Prob. 8AYLOCh. 19.2 - Prob. 9AYLOCh. 19.2 - Prob. 10AYLOCh. 19.2 - Prob. 11AYLOCh. 19.3 - Prob. 10BYGOCh. 19.3 - Prob. 11BYGOCh. 19.3 - Prob. 12BYGOCh. 19.3 - Prob. 13BYGOCh. 19.3 - Prob. 14BYGOCh. 19.3 - Prob. 1AYLOCh. 19.3 - Prob. 2AYLOCh. 19.3 - Prob. 3AYLOCh. 19.3 - Prob. 4AYLOCh. 19.4 - Prob. 15BYGOCh. 19.4 - Prob. 16BYGOCh. 19.4 - Prob. 17BYGOCh. 19.4 - Prob. 18BYGOCh. 19.4 - Prob. 19BYGOCh. 19.4 - Prob. 1AYLOCh. 19.4 - Prob. 2AYLOCh. 19.4 - Prob. 3AYLOCh. 19.4 - Prob. 4AYLOCh. 19.4 - Prob. 5AYLOCh. 19.4 - Prob. 6AYLOCh. 19.4 - Prob. 7AYLOCh. 19.5 - Prob. 20BYGOCh. 19.5 - Prob. 21BYGOCh. 19.5 - Prob. 22BYGOCh. 19.5 - Prob. 1AYLOCh. 19.5 - Prob. 2AYLOCh. 19.5 - Prob. 3AYLOCh. 19.5 - Prob. 4AYLOCh. 19.5 - Prob. 5AYLOCh. 19.5 - Prob. 6AYLOCh. 19.5 - Prob. 7AYLOCh. 19.5 - Prob. 8AYLOCh. 19.6 - Prob. 23BYGOCh. 19.6 - Prob. 24BYGOCh. 19.6 - Prob. 25BYGOCh. 19.6 - Prob. 26BYGOCh. 19.6 - Prob. 27BYGOCh. 19.6 - Prob. 1AYLOCh. 19.6 - Prob. 2AYLOCh. 19.6 - Prob. 3AYLOCh. 19.6 - Prob. 4AYLOCh. 19.6 - Prob. 5AYLOCh. 19.6 - Prob. 6AYLOCh. 19.6 - Prob. 7AYLOCh. 19.6 - Prob. 8AYLOCh. 19.6 - Prob. 9AYLOCh. 19.6 - Prob. 10AYLOCh. 19.6 - Prob. 11AYLOCh. 19.6 - Prob. 12AYLOCh. 19.6 - Prob. 13AYLOCh. 19.6 - Prob. 14AYLOCh. 19.6 - Prob. 15AYLOCh. 19.6 - Prob. 16AYLOCh. 19.6 - Prob. 17AYLOCh. 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. 1TFCh. 19 - Prob. 2TFCh. 19 - Prob. 3TFCh. 19 - Prob. 4TFCh. 19 - Prob. 5TFCh. 19 - Prob. 6TFCh. 19 - If all nerves to the heart were severed, the heart...Ch. 19 - Prob. 8TFCh. 19 - Prob. 9TFCh. 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
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
- Cardiac muscle hasa. sarcomeres. d. many mitochondria.b. a sarcoplasmic reticulum. e. All of these are correct.c. transverse tubules.arrow_forwardA. Neuromuscular junction ere a nerve cell contacts a muscle cell relaying a signal to contract in the form of an action potential is В. C. Motor end plate Axon terminals D. Sarcolemma 36-Primary cilia present in endothelial cells, they exhibit a major role in the production of a potent vasodilator that is A. NO gas B Smooth muscles surrounding blood vessels C. Skeletal muscles surrounding veins D. 9+0 structure 37-In the structure of microtubules doublets in the axoneme, all the tubules contain. wall in which ............ is a major component. A. Dynein arm, tektin B. Tubulin, tektin and they share a C. Tektin, Dynein arm D. Nexin connection, interdoublet link 38-The best-studied type of myosin motor protein is A. Myosin II It has two heavy chains with four light chains. B. Myosin V C. Myosin VI D. Myosin X 39-During cell crawling, the formation of a protrusion at the front of the cell is necessary for a cell to move forward. Two types of protrusions depending on actin dynamics. A…arrow_forwardWhich of the following is true of propagation of longitudinal electrical flow in cardiac muscle. A. Current flows longitudinally from a region of depolarization through ryanodine receptors. B. Longitudinal current flows through inward rectifier potassium channels. C. This current can be detected at the body surface, if the source is large enough. D. A and B. E. All are true.arrow_forward
- Cardiac muscle cells produce more force when they have already shortened to less A than half of their resting length when they are stimulated more calcium is released into the fluid B around their actin and myosin filaments they are stimulated to contract before C their refractory period has ended more acetylcholine is released from D nearby neuronsarrow_forwardThe pacemaker cardiac muscle cells rely on ______________ for their action potentials. a. Na+ leak channels and fast voltage-gated Na+ channels b. Ca+2 leak channels and slow voltage-gated Ca+2 channels c. Na+ leak channels and fast voltage-gated Ca+2 channels d. Ca+2 leak channels and fast voltage-gated Ca+2 channelsarrow_forwardAction potentials are spread rapidly between cardiac muscle cells by a. sarcomeres. b. intercalated discs. c. chemical neurotransmitters. d. the fibrous skeleton.arrow_forward
- Which of these statements concerning aging and skeletal muscle iscorrect?a. A loss of muscle fibers occurs with aging.b. Slow-twitch muscle fibers decrease in number faster than fast-twitchmuscle fibers.c. The loss of strength and speed is due mainly to loss of neuromuscular junctions.d. The density of capillaries in skeletal muscle increases.e. The number of motor neurons remains constant.arrow_forwardCompared with skeletal muscle, visceral smooth muscle a. has the same ability to be stretched. b. loses the ability to contract forcefully when stretched. C. maintains about the same tension, even when stretched. d. cannot maintain long, steady contractions. e. can accumulate a substantial oxygen deficitarrow_forwardCardiac muscle cells differ from skeletal muscle cells because: a. They can respond to neurotransmitters.b. They are striated.c. They contain intercalated discs and gap junctions.d. They require calcium for contraction.arrow_forward
- Action potentials pass from one cardiac muscle cell to anothera. through gap junctions.b. by a special cardiac nervous system.c. because of the large voltage of the action potentials.d. because of the plateau phase of the action potentials.e. by neurotransmittersarrow_forwardOnly one is correct Contraction of cardiac muscle is initiated during which phase of the fast action potential? What ion mediates this effect? A. Phase 0 due to Ca++ entry B. Phase 1 due to Na+ entry and K+ exit C. Phase 2 due to Ca++ entry D. Phase 4 due to K+ exit Group of answer choices Phase 2 due to Ca++ entry Phase 1 due to Na+ entry and K+ exit Phase 0 due to Ca++ entry Phase 4 due to K+ exitarrow_forwardThe Interstitial Cells of Cajal (ICC) generate "slow waves" which refer to A. slow action potentials. OB. phasic contractions. C. tonic contractions. D. oscillating resting membrane potentials. OE. oscillating release of paracrine factors. in smooth 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
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