Ryanodine Receptor (RyR) SERCA (SR Ca2+ ATPase) Voltage-gated Na+ channels Actin Myosin Acetylcholine receptor (AChR) Tropomyosin Troponin DHPR ✓ [Choose ] binds calcium and interacts with tropomyosin generate and propagate action potential in muscle cell membrane transports calcium into the SR at the expense of ATP hydrolysis voltage-sensing protein embedded in the T-tubule membrane, interacts with RyR neurotransmitter receptor that initiates depolarization of muscle cell membrane blocks the myosin binding sites of the thin filament unless Ca2+ levels are high motor protein with ATP-binding domain and actin-binding domain ion channel found in SR membrane, through which Ca2+ leaves the SR major component of the thin filament to which myosin binds [Choose ] [Choose ] [Choose] [Choose ] [Choose ] < >

Ryanodine Receptor (RyR) SERCA (SR Ca2+ ATPase) Voltage-gated Na+ channels Actin Myosin Acetylcholine receptor (AChR) Tropomyosin Troponin DHPR ✓ [Choose ] binds calcium and interacts with tropomyosin generate and propagate action potential in muscle cell membrane transports calcium into the SR at the expense of ATP hydrolysis voltage-sensing protein embedded in the T-tubule membrane, interacts with RyR neurotransmitter receptor that initiates depolarization of muscle cell membrane blocks the myosin binding sites of the thin filament unless Ca2+ levels are high motor protein with ATP-binding domain and actin-binding domain ion channel found in SR membrane, through which Ca2+ leaves the SR major component of the thin filament to which myosin binds [Choose ] [Choose ] [Choose] [Choose ] [Choose ] < >

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter27: Metabolic Integration And Organ Specialization

Section: Chapter Questions

Problem 3P

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Similar questions

The release of calcium ions initiates muscle contractions. Watch this video (http://openstaxcollege.org/l/calciumrole) to learn more about the role of calcium. (a) What are â€œT-tubulesâ€� and what is their role? (b) Please also describe how actin-binding sites are made available for cross-bridging with myosin heads during contraction.
Calcium is vital for bone growth, but it's also an important part of neural transmission. The role of calcium in neural transmission is that it enables the axon terminals to effectively Select one: a. secrete neurotransmitter into the synapse via exocytosis b. reabsorb neurotransmitter from the synapse via endocytosis after an action potential c. reabsorb neurotransmitter from the synapse via exocytosis after an action potential d. secrete neurotransmitter into the synapse via endocytosis
Know the Sliding Filament Theory & neurological events leading up to contraction. (i.e. from the impulse to relaxation). Can you outline how an electrical signal is transmitted from the neuron to the muscle? What is meant by the term “excitation-contraction coupling?”
In order to study and understand muscle diseases, one needs to have a good understanding of normal muscle function. Briefly outline the process of cross-bridge cycling in muscle contraction. Be sure to highlight the role of Ca2+ and ATP/ADP in the process.
Fill in the blanks: In the contraction of the insect sarcomere, Cat+ binds with ____ causing it to change shape and remove _____from the actin reactive site. Myosin heads then bind with the reactive site, bend inward, release and reattach in a repeating cycle referred to as _____. The neurotransmitter released at the neuromuscular junction of insects is called ____ This neurotransmitter binds with receptors in the _____of the muscle fiber, which causes an electrical response that is carried deep into the fiber by invaginations called the _____. Each muscle unit of an insect is Innervated by a ____, which causes powerful rapid contractions, a slow axon, which causes slower, weaker contractions, and an inhibitory neuron, which releases the neurotransmitter ____.
The depletion of ATP in muscle cells causes ____. myosin heads to remain bound to actin calcium ions to be released from the sarcoplasmic reticulum myosin-binding sites on actin to be blocked again by tropomyosin. ligand-gated sodium channels to close again
.The poison ouabain (wah-BAY-in), or arrow poison, blocks the Na+ K+pump. What effect would this poison have on the sodium and potassium ion gradients and so on the action potentials of a muscle fiber?
The 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 depolarized
At what point during excitation contraction coupling does exocytosis play a role? Group of answer choices during acetylcholine release from the synaptic terminal during calcium ion reuptake into the sarcoplasmic reticulum when sodium channels open up on the motor end plate when ATP splits into ADP and P on the free myosin head when the action potential surges through the T-tubules
In all human cells, there is a higher concentration of calcium ions outside of thecell than on the inside of the cell. Calcium pumps are primary active transportproteins that help to maintain this imbalance. Describe how calcium pumpswork, including the direction of ion transport and the source of energy of thecalcium pumps.
Calcium ions are responsible for unmasking of active site on which protein for cross bridge activity during muscle contraction? 1.Troponin 2.Tropomyosin 3.Myosin 4.Actin
An ion that is essential for muscle contraction is Ca2+. Which of the following statements about the calcium ion and muscle contractions is TRUE? Select one: a. Muscle contractions can occur whether Ca2+ concentrations are high or low. b. Ca2+ binds to the tropin-tropomyosin protein complex shifting it out of the way and allows the myosin to bind to the actin so contraction can occur. c. When Ca2+ concentrations are high, tropomyosin inhibits myosin binding and the muscle is relaxed. d. Ca2+ ions are stored in the sacroplasmic reticulum during the muscle contractions. I do not know which one is