Frank is about to run a race, his body is preparing to focus his blood flow to the muscles and lungs. Right before he begins the race, which division of his nervous system is activated to control this response?

• autonomic

• voluntary

• peripheral

• sympathetic

When is the phosphagen system of ATP use most likely to occur?

• at the beginning of a race

• during the middle of the race

• at the end of the race

• after the race is over

Which system will supply a steady source of energy for exercise as long as there is enough oxygen and glycogen/ glucose available?

• aerobic respiration

• phosphagen system

• glycogen-lactic acid system

• anaerobic respiration

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Which body systems are involved in powering an athlete through a race? (more than one is correct)

• digestive

• respiratory

• cardiovascular

• integumentary

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Muscle fatigue occurs when

• the muscles can no longer generate force

• the muscles receive adequate stimulation from calcium ions

• the muscles receive too much calcium ions

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Which of these will cause muscle fatigue?

• lack of oxygen

• lack of fluid & electrolytes

• lack of sleep

• poor nutrition

• all of these may cause muscle fatigue

What specific ion must be released from the sarcoplasmic reticulum for muscles to contract?

• calcium

• nitrogen

• potassium

• argon

How can a person train to overcome muscle fatigue?

• build more muscle mass

• exercise to increase lung capacity

• train their muscles to ignore brain signals to stop

• all of these