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WorksheetsMuscle Fibres and Motor Unit
Total questions: 18
Worksheet time: 12mins
A muscle fibre type that would be used for an 800 metre run is known as...
...type 1
...type 2a
...type 2b
...type 2x
A muscle fibre type that has a high aerobic capacity is known as...
...type 1
...type 2a
...type 2b
...type 2x
Which one of the following is a key characteristic of Fast Twitch X muscle fibers?
They are Red in color, meaning they contain a lot of mitochondria
They contract rapidly with great force but fatigue fast
They are recruited for long duration activities
They contain high numbers of Mitochondria
The neurotransmitter that signals muscle contraction is called...
Acetylcholine
Myosin
Actin
Calcium
The space between the motor neuron and a muscle fiber at a neuromuscular junction
synaptic knob
motor end plate
synaptic cleft
motor neural termination
An electrical impulse within a single neuron is called a
synapse
membrane potential
action potential
cell body
What is the function of type 11a muscle fiber?
Type 11a muscle fibers are only used during high-intensity exercise.
Type 11a muscle fibers are responsible for muscle contraction.
Type 11a muscle fibers have a high capacity for both aerobic and anaerobic metabolism.
Type 11a muscle fibers are primarily used for endurance activities.
What is the all or none law in muscles?
What are the features of type 1 muscles fibres?
Slow twitch muscle fibres have:
More mitochondria and more myoglobin than fast twitch
More mitochondria and less myoglobin than fast twitch
Less mitochondria and more myoglobin than fast twitch
Less mitochondria and less myoglobin than fast twitch
Select all of the correct statements for fast twitch fibres
Are more aerobic
Are often used to maintain posture
Fatigue more quickly
fatigue more slowly
Are more anaerobic
Nucleus
Cell Body
Axon
Node of Ranvier
