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Q: A runner is three quarters of the way through a marathon. Which systems are working to maintain oxygen levels for the runner's muscles? A. integumentary, excretory, nervous, endocrine B.
circulatory, excretory, nervous, endocrine C. respiratory, excretory, nervous, endocrine D. circulatory, respiratory, nervous, endocrine
A: circulatory, respiratory, nervous, endocrine
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User: A runner is three quarters of the way through a marathon. Which systems are working to maintain oxygen levels for the runner's muscles? A. integumentary, excretory, nervous, endocrine B. circulatory, excretory, nervous, endocrine C. respiratory, excretory, nervous, endocrine D. circulatory, respiratory, nervous, endocrine

Weegy: circulatory, respiratory, nervous, endocrine
queengreen2011|Points 50|

User: In humans body temperature is kept fairly constant by automatic responses controlled by which of the following? A. the hypothalamus B. heart rate C. the skin D. the amount of muscle

Weegy: In humans body temperature is kept fairly constant by automatic responses controlled by hypothalamus.
johnjohn|Points 56|

User: Which of the following is a method of maintaining homeostasis in the human body? A. eating balanced meals B. shivering when cold C. working in air conditioning D. sleeping regularly

Weegy: Which of the following is a method of maintaining homeostasis in the human body? B. shivering when cold
patmarone|Points 150|

User: To maintain homeostasis what must follow the chemical decomposition of food for energy production? A. muscle contractions B. intake of water C. removal of wastes D. nervous impulses

Weegy: To maintain homeostasis removal of wastes must follow the chemical decomposition of food for energy production.
johnjohn|Points 56|

User: Which systems interact to maintain blood pressure? A. urinary, circulatory, endocrine B. circulatory, respiratory, nervous C. muscular, endocrine, nervous D. urinary, endocrine, nervous

Weegy: D
Elzinc1|Points 155|

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Asked 6/28/2011 10:38:56 PM
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