unit 3.1 introduction to power. 1. what are the resources the human body needs to survive? food this...
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Unit 3.1Introduction to Power
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1. What are the resources the human body needs to survive?
• Food• This includes macromolecules (Lipids, Carbohydrates & Proteins), as well as
vitamins & minerals
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1. What are the resources the human body needs to survive? Cont.• Water
• Can be taken in through foods or drinks—the body is ¾ water!
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1. What are the resources the human body needs to survive? Cont.
• Oxygen • The air around us is about 20% oxygen—the gas humans need to survive
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2. What role does food play in the human body?Macromolecule FunctionCarbohydrates Quick energy source
Lipids Long term energy source, cushioning of organs, surrounds axons in the CNS and PNS
Proteins Build & repair body tissues
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3.What role does water play in the human body?
1. Dissolves other materials & allows them to flow (in blood)
2. Gives cells structure (just right amount needed to prevent shrinking and exploding)
3. Allows food to digest & pass through intestinal walls into bloodstream
4. Carries waste products out of body (in urine)
5. Helps send electrical messages
6. Regulates homeostasis of body temperature (evaporation/sweating)
7. Lubricates structures (i.e. allows fecal matter to pass through large intestine)
8. Protective barrier around organs
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4. What role does oxygen play in the human body?
• Oxygen allows humans to metabolize (burn) fuel (food) creating energy.
• Every cell in the human body needs oxygen to survive.
• Cells turn glucose and oxygen into energy within their mitochondria, in a process called “cellular respiration.”
• Without oxygen, we can’t process food or make energy.
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5. What human body systems work to create, process or distribute the body’s main power sources?
• Food• Taken in through the DIGESTIVE
system (absorbed through small intestine walls)
• Passes to the CARDIOVASCULAR system for distribution to all cells
• Insulin (made in the ENDROCRINE system) allows cells to uptake sugar
• Processed within the mitochondria.
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5. What human body systems work to create, process or distribute the body’s main power sources? Cont.• Water
• Taken in through the DIGESTIVE system
• Passes to the CARDIOVASCULAR system for distribution to all cells
• Filtered through the kidneys of the URINARY system to remove waste and maintain homeostasis of fluid levels.
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5. What human body systems work to create, process or distribute the body’s main power sources? Cont.• Oxygen
• Taken in through the RESPIRATORY system• Passes to the CARDIOVASCULAR system
(through the capillaries that surround the alveoli)
• Is distributed to all cells where it’s processed within the mitochondria.
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6. How do personal factors and environmental factors impact the body’s ability to survive without air, food or water?
Environmental Personal
• Presence of dangerous animals (i.e. sharks or poisonous spiders)
• Temperature of air• Humidity of air• Presence of protective clothing
• Fitness level • Age• Will to survive• Amount of fat • Genes• Metabolism