1.
Copyright
2016
Terry Austin
Question
414098
What are some components involved in a neuromuscular junction?
Copyright 2016 Terry Austin
2.
Copyright
2017
N. Marlo Ballard
Question
573355
Which of the following is NOT a component of theneuromuscular junction?
A. axon terminal
B. myofibrils
C. synaptic cleft
D. motor end plate
Copyright 2016 Terry Austin
3.
Copyright
2013
Amy Skibiel
Question
59458
Which of the following neurotransmitters is (are) released by neurons at the neuromuscular junction?
A. acetylcholine
B. epinephrine
C. norepinephrine
D. Two of the choices
Copyright 2013 Amy Skibiel
4.
Copyright
2014
Laura Gruss
Question
68641
At the neuromuscular junction, acetylcholine (ACh) is released from the motor neuron's axon terminals. What does ACh do once it enters the
synaptic cleft and binds to receptors on the motor end plate?
A. It stimulates the sarcoplasmic reticulum to release calcium ions into the sarcoplasm of the muscle fiber.
B. It increases the conduction speed of action potentials transmitted along the sarcolemma.
C. It causes troponin to change shape, uncovering the active sites on G-actin and allowing the thick filaments to bind to the thin filaments.
D. It allows sodium ions to pass through the sarcolemma, which makes the transmembrane potential less negative and initiates an action
potential in the sarcolemma.
Copyright 2013 Amy Skibiel
5.
Copyright
2021
Valerie Wheat
Question
1275334
At rest, both the neuron and the muscle cell have a resting transmembrane potential. When acetylcholine binds its receptor, a ligand-gated
sodium channel, the channel opens. Sodium ions rush into the muscle cell, beginning the action potential.
What is the effect of the influx of sodium ions on the transmembrane potential?Will it increase or decrease? Draw an arrow up or down
to indicate the direction of change.
Copyright 2021 Valerie Wheat