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mina [271]
3 years ago
12

Scientific theories _____.

Biology
1 answer:
MAXImum [283]3 years ago
6 0
I believe they can be changes and revised
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In the human body, muscle cells have an increased need for energy during exercise. To help supply this energy, the body will imm
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The correct answer is option (h) the breathing rate to supply more oxygen to cells for the release of energy.

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During exercise, the breathing rate, pulse rate and lactic acid levels increase in the human body. Muscle cells have an increased need for energy and heart pumps more oxygen to the muscle cells to meet the requirement. Breathing rate increases to supply more oxygen to the muscle cells which is required for the oxidation of the glucose, release of more energy and to get rid of the carbon dioxide.


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Question 15 of 20:
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Answer:  b

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An open system is when nutrients and waste are moved through the body   freely through the body cavity, rather than being enclosed in veins.

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