Astronauts in Zero Gravity Are Able to Move Food Through

question 98

Multiple Choice

Astronauts in zero gravity are able to move food through their digestive tracts because

• A) smooth muscle produces waves of contractions that propel material through the digestive tract.
• B) skeletal muscle puts pressure on the digestive tract.
• C) cardiac muscle maintains a high pressure that moves material through the digestive tract.
• D) striated muscle creates a pressure gradient that forces material from one end of the digestive tract to the other.
• E) skeletal muscle sphincters contract and allow materials to move through the digestive tract.

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