Muscular System: Part 4

Which types of exercises can be continued for a prolonged period of time?

• Aerobic

• Anaerobic

Which types of exercises cannot be continued for a prolonged period of time?

• Aerobic

• Anaerobic

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What is glucose broken down into when there is not enough oxygen for a body to perform an exercise?

• Lactic acid

• Glycogen

• Hydrogen

• Amino acid

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Why do people get sore after doing a new exercise or continuing a certain exercise for a long period of time?

• The creation of lactic acid creates an oxygen debt

• The creation of lactic acid creates a blood debt

• The creation of lactic acid creates a hydrogen debt

• The creation of lactic acid creates a protein debt

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When there is not enough oxygen to continue an exercise, where does the body get oxygen from?

• Blood and tissues

• Hair and nails

• It simply produces more on its own

• Lipids

What is muscle fatigue?

• A condition that occurs when a muscle is exercised persistently for a prolonged period of time and loses its ability to contract

• A sustained, painful, involuntary muscle contraction

• Ongoing contraction of some fibers in otherwise resting skeletal muscle

• A single contraction due to one impulse from a motor neuron

What is a muscle cramp?

• A condition that occurs when a muscle is exercised persistently for a prolonged period of time and loses its ability to contract

• A sustained, painful, involuntary muscle contraction

• Ongoing contraction of some fibers in otherwise resting skeletal muscle

• A single contraction due to one impulse from a motor neuron

What is muscle tone?

• A condition that occurs when a muscle is exercised persistently for a prolonged period of time and loses its ability to contract

• A sustained, painful, involuntary muscle contraction

• Ongoing contraction of some fibers in otherwise resting skeletal muscle

• A single contraction due to one impulse from a motor neuron

What is a twitch?

• A condition that occurs when a muscle is exercised persistently for a prolonged period of time and loses its ability to contract

• A sustained, painful, involuntary muscle contraction

• Ongoing contraction of some fibers in otherwise resting skeletal muscle

• A single contraction due to one impulse from a motor neuron

Which is true of muscle fibers and motor neuron axons?

• Most muscle fibers have only 1 axon to stimulate them

• Most motor neuron axons only connect to 1 muscle fiber

• Most muscle fibers have multiple motor axons to stimulate them

• Most motor neuron axons connect to multiple muscle fibers