Which of the following is true of cardiac muscle?о а.Cardiac cells are electrically connected via intercalated diskso b. All of these statements are trueIt is the only type of tissue that produces spontaneous action potentialso d. It is made of multinucleate cellsIt lacks sarcoplasmic reticulumОс.Ое.

Muscular tissue consists of cells called muscle fibers that are specialized for contraction. Based…

Answered: Which of the following is true of…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Similar questions

Match each numbered item with the most closely related lettereditem.1. perimysium2. sarcolemma3. I band4. aponeurosis5. sarcomere6. fast glycolytic fiber7. muscle tone8. antagonist9. circular muscle10. myosina. type of muscle fiber that fatigueseasilyb. muscle fiber plasma membranec. muscle whose function opposesagonistd. connective tissue covering a fasciclee. functional contractile unit of askeletal muscle fiberf. protein in thick filamentsg. sarcomere region with thinfilaments onlyh. muscle that surrounds an openingi. the resting tension within a musclej. muscle attachment that is a thin,flattened sheet
2. compare excitation contraction coupling and relaxation in cardiac and skeletal muscles. Include similarities and differences. Make a chart Mention action potential generation, sarcoplasmic reticulum, calcium, troponin, tropomyosin, myosin, actin, crossbridge formation, Calcium ATPase (CaATPase), Sodium-Calcium-Exchanger (NCX), t-tubules.
Determine 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 potentials
Which of the following would NOT occur as a result of regular exercise to a specific muscle group (assume you are resting now, but have been working this muscle group)? more capillaries will grow into the area the muscle cells will build more mitochondria O the muscle cells will build fewer contractile proteins O the muscle cells will increase their glycogen stores
Cardiac muscle cells produce more force when _____. A they have already shortened to less than half of their resting length when they are stimulated B more calcium is released into the fluid around their actin and myosin filaments C they are stimulated to contract before their refractory period has ended D more acetylcholine is released from nearby neurons
Complete the following statements about the structure of the different muscle types. Not all choices will be used.
2. Compare excitation-contraction coupling and relaxation in cardiac and skeletal muscles. Include similarities and differences. How is ECC similar in the two types of muscles (the roles of calcium and ATP, ADP+P for example mention action potential generation, sarcoplasmic reticulum, calcium, troponin, tropomyosin, myosin, actin, crossbridge formation, Calcium ATPase (CaATPase), Sodium-Calcium-Exchanger (NCX), t-tubules.
In which type(s) of muscle cells does each cell have its own neuromuscular junction? skeletal only unitary smooth and skeletal skeletal and cardiac 2. The follow is NOT true of CARDIAC muscle fibers: - connected by gap junctions - include pacemaker cells that can produce produce action potentials at regular intervals without innervation - without calcium cross bridge cycles will not occur and fibers will not shorten - each cell in a motor unit has a neuromuscular junction with the same motor neuron actin and myosin filaments are arranged in sarcomeres produce greater force when stretched than at resting length 3. Match the following: -Skeletal muscle -Cardiac muscle -Smooth muscle Can maintain prolonged isometric contractions with very little energy Striated muscle fibers with gap…
Which of the following is a microscopic feature of a skeletal muscle fiber? a. It contains multiple nuclei that are centrally located b. it contains myoglobin for oxygen storage c. it contains glycosomes for glycogen storage d. a and b e. b and c
The 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 acell
Which of the following does NOT limit normal clot growth to the sight of injury? O A) Removal and dilution of clotting factors O B) Fibrin binding to thrombin O C) Antithrombin III D) Exposed collagen fibers O E) Serotonin
Cardiomyocytes differ from skeletal muscle cells in that cardiomyocytes ______. A "do not have actin, myosin, or Z-disk " B do not have their actin and myosin arranged into sarcomeres and myofibrils C cannot have action potentials at a high enough frequency for tetani to occur D have fewer mitochondria and are more reliant on anaerobic respiration E All of the above are true of heart muscle cells

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