PW3creatingfitnessplan

Open Ended

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Multiple Choice

What is muscle fatigue?

• When your muscles get tired after light exercise

• What occurs when your muscles become weaker without regular activity

• When a muscle exhibits a physiological inability to contract

• The process that occurs if your muscles don’t receive the correct nutrients during development

Multiple Choice

The energy and power for muscle contraction come primarily from which of the following molecules?

• Free sugars in the bloodstream

• Hemoglobin

• ATP

• Sodium

Open Ended

Skeletal muscles can only contract in one direction. Because of this, many of them are paired with muscles that contract in the opposite direction. These groups are called antagonistic pairs, with examples being the biceps and triceps. Can you describe any other muscles that work together as antagonistic pairs?