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otez555 [7]
2 years ago
7

Explain the changes that happen in the body before and after exercise

Biology
1 answer:
atroni [7]2 years ago
3 0

Answer:

While exercising, the muscles need additional energy as the breathing rate and volume of each breath increase to bring more oxygen into the body and remove the carbon dioxide produced. If insufficient oxygen is available to the muscles, for instance, the exercise is vigorous and/or prolonged, the heart and lungs are unable to supply sufficient oxygen. Muscles begin to respire anaerobically. Lactic acid is produced from glucose, instead of carbon dioxide and water. Muscles continue to contract, but less efficiently. When a period of exercise is over, lactic acid must be removed, because the body's tolerance to lactic acid is limited. These processes require oxygen. This is why, when the period of activity is over, a person’s breathing rate and heart rate do not return to normal straight away.

Explanation:

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Scientific evidence suggests that the entire human population descended from just several thousand African migrants about 50,000
zhannawk [14.2K]

Answer: Fossils and primitive drawings in several digs around the world continents.

Explanation: I would expect to find fossils and primitive drawings of these several thousand African migrants on different areas around the world. I would like to find primitive bones, specially skulls and teeths and stones with drawings and old writings representing the life of these small population in Africa who made the entire human population.

5 0
3 years ago
On a molecular level, explain what happens when a kite lifts into the air?
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The difference in air pressure which is created by the molecules in air help to move kite up into the air.

<u>Explanation:</u>

When air moves faster, pressure of air becomes less. Air moves at a faster speed above the kite than below it and so its pressure is less on top of kite. The air pressure below kite is less. This difference in pressure results in uplifting of kite. Molecules of air with high pressure exerts more force on kite from bottom and thus pushing it up in air.

The greater is the difference between air pressure above kite and air pressure below kite, greater is the amount of force exerted on kite and hence, it reaches a greater height.

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scoundrel [369]

<span>True plankton are low in the food chain</span>

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6 0
3 years ago
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<h3>What are cancer cells?</h3>

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Normal cells are characterized by their ability to regulate cell division during the cell cycle.

Therefore, one difference between cancer cells and normal cells is that cancer cells continue to divide even when they are tightly packed together.

Learn more about cancer cells at: brainly.com/question/436553

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