ANAT.+PHYSIO.2-LAB.MAN. >CUSTOM<
20th Edition
ISBN: 9781264303090
Author: VanPutte
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 20, Problem 6RAC
Summary Introduction
Introduction:
Cardiac muscle is present only in the walls of the heart. It connects at branching, irregular angles, which are known as intercalated discs. The movement of cardiac muscle is involuntary.
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The action potential of skeletal muscle
A. is not essential for contraction.
B. is longer than the action potential of cardiac muscle.
C. has a prolonged plateau phase.
D. causes the immediate uptake of calcium ions into the lateral sacs of the sarcoplasmic reticulum.
E. spreads inward to all parts of the muscle via the T tubules.
Heart muscle cells would tend to separate without.....
a.stroma
b.flana
c.intercalated discs
d.myofilaments
Given these characteristics:Matrix composed almost entirely of extracellular collagen fibers. It is able to withstand great pulling forces. Which of the tissue is described?
A. Adipose. B.Cartilage. C.Bone. D. Dense connective tissue. E.Loose connective tissue
2. According to Frank-Starling law of the heart,
A.increased preload causes increased cardiac output. B.increased afterload causes increased cardiac output. C.decreased preload causes increased afterload. D.afterload influences cardiac output more than preload. E.cardiac output is not influenced by preload.
Chapter 20 Solutions
ANAT.+PHYSIO.2-LAB.MAN. >CUSTOM<
Ch. 20.1 - State the four functions of the heart.Ch. 20.2 - What is the approximate size and shape of the...Ch. 20.2 - Where is the heart located? How does this...Ch. 20.3 - Describe the parts of the pericardium and their...Ch. 20.3 - Describe the three layers of the heart wall, and...Ch. 20.3 - Name the chambers of the heart, and describe their...Ch. 20.3 - List the major blood vessels that enter and leave...Ch. 20.3 - Prob. 8AYPCh. 20.3 - Prob. 9AYPCh. 20.3 - Prob. 10AYP
Ch. 20.3 - Describe the openings of the right and left atria....Ch. 20.3 - Prob. 12AYPCh. 20.3 - Prob. 13AYPCh. 20.3 - Prob. 14AYPCh. 20.4 - Prob. 15AYPCh. 20.5 - Prob. 16AYPCh. 20.5 - Prob. 17AYPCh. 20.5 - Prob. 18AYPCh. 20.5 - Prob. 19AYPCh. 20.5 - Identify the parts of the conducting system of...Ch. 20.5 - Prob. 21AYPCh. 20.5 - Prob. 22AYPCh. 20.6 - Prob. 23AYPCh. 20.6 - Prob. 24AYPCh. 20.6 - Prob. 25AYPCh. 20.6 - Prob. 26AYPCh. 20.6 - What does an ECG measure? Nome the waves...Ch. 20.7 - Define systole and diastole.Ch. 20.7 - List the five periods of the cardiac cycle (see...Ch. 20.7 - Define isovolumetric. When does most ventricular...Ch. 20.7 - Prob. 31AYPCh. 20.7 - Prob. 32AYPCh. 20.7 - Prob. 33AYPCh. 20.8 - Prob. 34AYPCh. 20.8 - Explain the role of MAP in causing blood flow.Ch. 20.8 - Prob. 36AYPCh. 20.8 - Prob. 37AYPCh. 20.8 - Prob. 38AYPCh. 20.9 - Prob. 39AYPCh. 20.9 - Prob. 40AYPCh. 20.9 - Prob. 41AYPCh. 20.9 - Prob. 42AYPCh. 20.9 - Prob. 43AYPCh. 20.10 - Prob. 44AYPCh. 20.10 - Prob. 45AYPCh. 20.10 - What effect does an increase or a decrease...Ch. 20.10 - Prob. 47AYPCh. 20.11 - Prob. 48AYPCh. 20.11 - Prob. 49AYPCh. 20.11 - Prob. 50AYPCh. 20.11 - Prob. 51AYPCh. 20 - Which of these structures returns blood to the...Ch. 20 - Prob. 2RACCh. 20 - Prob. 3RACCh. 20 - Prob. 4RACCh. 20 - Prob. 5RACCh. 20 - Prob. 6RACCh. 20 - Action potentials pass from one cardiac muscle...Ch. 20 - During the transmission of action potentials...Ch. 20 - Given these structures of the conducting system of...Ch. 20 - Prob. 10RACCh. 20 - Prob. 11RACCh. 20 - The greatest amount of ventricular filling occurs...Ch. 20 - Prob. 13RACCh. 20 - Prob. 14RACCh. 20 - Prob. 15RACCh. 20 - Cardiac output is defined as blood pressure times...Ch. 20 - Pressure in the aorta is at its lowest a. at the...Ch. 20 - Prob. 18RACCh. 20 - Prob. 19RACCh. 20 - Prob. 20RACCh. 20 - Prob. 21RACCh. 20 - Increased parasympathetic stimulation of the heart...Ch. 20 - Prob. 23RACCh. 20 - Prob. 24RACCh. 20 - Prob. 25RACCh. 20 - Prob. 1CTCh. 20 - In most tissues, peak blood flow occurs during...Ch. 20 - Prob. 3CTCh. 20 - Prob. 4CTCh. 20 - A patient has tachycardia. Would you recommended a...Ch. 20 - Prob. 6CTCh. 20 - A doctor lets you listen to a patient's heart with...Ch. 20 - Explain why it is sufficient to replace the...Ch. 20 - Prob. 9CTCh. 20 - Prob. 10CTCh. 20 - Prob. 11CT
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- 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.arrow_forwardWhich of the following is unique to cardiac musclecells?a. Only cardiac muscle contains a sarcoplasmicreticulum.b. Only cardiac muscle has gap junctions.c. Only cardiac muscle is capable ofautorhythmicityd. Only cardiac muscle has a high concentration ofmitochondria.arrow_forwardAction potentials are spread rapidly between cardiac muscle cells by a. sarcomeres. b. intercalated discs. c. chemical neurotransmitters. d. the fibrous skeleton.arrow_forward
- A. 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_forwardStimulation of a muscle fiber by a motor neuron occurs ata. the neuromuscular junction.b. the transverse tubules.c. the myofibril.d. the sarcoplasmic reticulum.e. none of the above.arrow_forwardThe structure (a specialized synapse) that allows neurons to control our skeletal muscle fibers is called the: 19. A. sarcolemma extracellular inard B. neuromuscular junction C. sarcoplasmic reticulum D. cross-bridge axiom arcople acellarrow_forward
- Before a skeletal muscle fiber can contract,Ca2+ must bind toa. calsequestrin.b. calmodulin.c. the myosin head.d. troponin.e. actinarrow_forwardSmooth muscle cells have , whereasskeletal muscle fibers do not.a. sarcoplasmic reticulumb. tropomyosinc. calmodulind. Z discse. myosin ATPasearrow_forwardAction 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_forward
- Keeps the cell tight together and prevent stretching of tight junction during contraction? Select one: a. Bachman's bundle b. AV node c. Gap junction d. Desmosomes e. His bundlearrow_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_forwardWhich of the following is true of cardiac muscle? о а. Cardiac cells are electrically connected via intercalated disks o b. All of these statements are true It is the only type of tissue that produces spontaneous action potentials o d. It is made of multinucleate cells It lacks sarcoplasmic reticulum Ос. Ое.arrow_forward
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