Podcast
Questions and Answers
What is the role of Schwann cells in the innervation of muscle fibers?
What is the role of Schwann cells in the innervation of muscle fibers?
- To form the motor end plate on the muscle cell surface.
- To branch out within the perimysium and form synapses with multiple muscle fibers.
- To transmit action potentials directly into the muscle fiber.
- To enclose the small axon branches and cover their points of contact with the muscle cells. (correct)
Where do myelinated motor nerves typically branch out before innervating individual muscle fibers?
Where do myelinated motor nerves typically branch out before innervating individual muscle fibers?
- Within the endomysium.
- Within the perimysium. (correct)
- Directly on the motor end plate.
- Within the sarcolemma.
What is the primary structural component formed by an axonal branch on the muscle cell's surface?
What is the primary structural component formed by an axonal branch on the muscle cell's surface?
- The motor end plate. (correct)
- The T-tubule.
- The sarcoplasmic reticulum.
- The synaptic cleft.
Which of the following sequences accurately describes the path of a motor nerve impulse from the spinal cord to a muscle fiber?
Which of the following sequences accurately describes the path of a motor nerve impulse from the spinal cord to a muscle fiber?
How do the unmyelinated terminal twigs pass through the connective tissue to form connections with individual muscle fibers?
How do the unmyelinated terminal twigs pass through the connective tissue to form connections with individual muscle fibers?
What is the primary function of the motor end plate (MEP)?
What is the primary function of the motor end plate (MEP)?
Which cellular structure forms the motor end plate (MEP)?
Which cellular structure forms the motor end plate (MEP)?
Where is the motor end plate (MEP) located?
Where is the motor end plate (MEP) located?
What is another name for the motor end plate (MEP)?
What is another name for the motor end plate (MEP)?
Which of the following best describes the physical interaction between the axonal branch and the muscle cell at the motor end plate (MEP)?
Which of the following best describes the physical interaction between the axonal branch and the muscle cell at the motor end plate (MEP)?
Flashcards
Perimysium
Perimysium
Myelinated motor nerves branch within this connective tissue layer surrounding muscle fiber bundles.
Endomysium
Endomysium
Unmyelinated nerve endings pass through this layer to synapse with individual muscle fibers
Schwann cells
Schwann cells
These cells enclose axon branches and cover their contact points with muscle cells.
Motor end plate
Motor end plate
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Innervation
Innervation
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Motor End Plate (MEP)
Motor End Plate (MEP)
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Neuromuscular Junction (NMJ)
Neuromuscular Junction (NMJ)
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Axonal Branches
Axonal Branches
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Dilated Termination
Dilated Termination
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Trough (at MEP)
Trough (at MEP)
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