One neuron and all the skeletal muscles it stimulates is known as a ________.
Neuromuscular Junction

Quiz
•
Mathematics
•
10th - 12th Grade
•
Hard
Charles Martinez
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
sarcoplasmic reticulum
motor unit
synaptic cleft
neuromuscular junction
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the unstoppable electrical current that travels down the length of the entire surface of a sarcolemma?
neurotransmitter
graded response
acetylcholine
action potential
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is released by axon terminals into the synaptic cleft to stimulate a muscle to contract?
potassium ions
sodium ions
acetylcholine
actin
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are calcium ions necessary for skeletal muscle contraction?
Calcium ions increase the speed of the action potential transmitted along the sarcolemma.
Calcium ions release the inhibition on Z discs.
Calcium ions trigger the binding of myosin heads to actin filaments.
Calcium ions cause ATP binding to actin.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is acetylcholine?
an ion pump on the postsynaptic membrane
a source of energy for muscle contraction
a component of thick myofilaments
a neurotransmitter that stimulates skeletal muscle to contract
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The gap between the axon terminal of a motor neuron and the sarcolemma of a skeletal muscle cell is called the ________.
motor unit
synaptic cleft
cross bridge
sarcomere
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What must rush into a muscle cell to promote its depolarization?
potassium ions
calcium ions
acetylcholine
sodium ions
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