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Can cardiac muscle exhibit (normally or under experimental conditions) summation or complete tetanus as does skeletal muscle? Why not?
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- Can cardiac muscle exhibit (normally or under experimental conditions) summation or complete tetanus as does skeletal muscle? Why not? (highlight the main concepts)Discuss that Can cardiac muscle exhibits (normally or under experimental conditions) summation or complete tetanus as does skeletal muscle? Why not?List the Histological (structural and shape) differences between skeletal, smooth and cardiac muscle. Remember, the cells are "designed" and "developed" in a manner that mandated that their "shape absolutely "fit" their function.
- 31) Provide one difference and one similarity in the process of contraction of smooth, skeletal, and cardiac muscle. These could include channels, mechanisms, anatomic features etc (SHORT ANSWER PLEASE)What is represented on the image above? A A cross-section of a cardiac muscle B A longitudinal section of a cardiac muscle A cross-section of a skeletal muscle A longitudinal section of a skeletal muscle EA cross-section of e smooth muscle F) A longitudinal section of a smooth muscleSkeletal muscle is described as striated. What are the lighter, thinner stripes noted under the microscope? Group of answer choices troponin actin myosin dystrophin Rather than innervating individual muscle fibers, motor neurons often innervate two or more muscle fibers. The motor neuron and the muscle fibers it innervates are together called a: Group of answer choices motor unit myofibril muscle fascicle motor fascia Fast glycolytic muscle fibers allow for relatively quick ATP energy production by splitting glucose (but eventually leads to fatigue), a process described as: Group of answer choices fermentation aerobic pathway anaerobic pathway ATP reserve use
- Describe in detail the events at the neuromuscular junction and how these events allow for the excitation-contraction coupling events to occur. Be sure to also include in detail the steps of the excitation-contraction coupling event. You should include: Events at the Neuromuscular Junction, Excitation-Coupling events and the Steps of the Cross Bridge Cycle.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-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…
- An autorhythmic muscle type containing mononucleated and striated muscle fibers. cardiac muscle smooth muscle skeletal muscle 2. This type of muscle is found in the lining of the stomach as well as the walls of arteries. cardiac muscle skeletal muscle smooth muscle 3. A muscle type that functions to transport substances through hollow viscera (organs). skeletal muscle cardiac muscle smooth muscle 4. Voluntary, striated and multinucleated muscle. skeletal muscle cardiac muscle smooth muscleDetermine 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 potentialsa. What is the fundamental contractile unit of skeletal muscle? b. What are the names of the bands, lines and zone of the contractile unit of skeletal muscle? c. Each of the contractile unit region names in (b) contains a letter. What does each of these letters stand for? d. What changes occur in the contractile unit regions during contraction?