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WorksheetsSkeletal Muscle and Motor Unit Structure
Total questions: 20
Worksheet time: 10mins
Which myofilament makes up the THIN filaments of muscle cells?
actin
myosin
connectin
hemoglobin
The THICK filaments found in a muscle cell are called
actin
myosin
The area of interconnecting actin molecules is called the
I zone
Z line
M line
A band
The neurotransmitter that signals muscle contraction is called...
Acetylcholine
Myosin
Actin
Calcium
What is the name of the protein that covers the binding sites on actin?
Myosin
Tropoblasts
Titan
Tropomyosin
The end of an axon that meets a muscle fiber
synaptic knob
motor end plate
synaptic cleft
motor neural termination
The part of the sarcolemma (the muscle cell membrane) that meets a motor neuron
synaptic knob
motor end plate
synaptic cleft
motor neural termination
The space between the motor neuron and a muscle fiber at a neuromuscular junction
synaptic knob
motor end plate
synaptic cleft
motor neural termination
What is the name for the place where a motor neuron meets a muscle?
neuromuscular junction
neuropathy
myoneuroplasticity
nervous muscular tissue
Which myofibril is a large bundle of proteins with contractile heads sticking out all throughout the bundle?
Myosin
Actin
Troponin
Tropomyosin
Muscles in the eye contain motor units with a motor neuron connected to only five muscle fibers. What type of control does a person have over these muscles?
Very little control
No control
Extremely accurate control
Moderate or average control
Which myofibril is attached to the M line?
Myosin
Actin
Troponin
Tropomyosin
What type of nerve causes a muscle to contract?
motor neuron
parasympathetic neuron
interneuron
sensory neuron
The bundles of fibers found in a muscle cell are called
muscle fibers
myofibrils
myofilaments
myofascicles
What are myofibrils composed of?
muscle fibers
muscle fascicles
myofilaments
myopathic fibers
