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What is the purpose of the digestive system?
To break molecules down so they can diffuse.
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What is the purpose of the respiratory system?
Use oxygen to break down molecules into energy.
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What is the purpose of the circulatory system?
To move molecules around the body.
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What is the purpose of the excretory system?
To remove harmful wastes from the body.
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What is the purpose of the nervous system?
To send signals along nerves to react to stimuli.
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What is the purpose of the endocrine system?
To send chemical messages to cells. More of a long term effect.
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What is the purpose of the immune system?
To resist disease
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What is the purpose of the reproductive system?
To make more of an organism.
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What can the Regents call homeostasis?
Steady state, or dynamic equilibrium. Dynamic equilibrium is more accurate because it shows changing where steady state implies that it is consistant.
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What is a feedback mechanism?
A reaction to the changing stimuli, like heart rate increasing as muscle activity increases.
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What are the 5 causes of a disease?
Poor nutrition, inherited disorder, exposure to toxins, organ malfunction, and high-risk behaviors.
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What organisms can be considered pathogens?
Viruses, bacteria, fungi, and other parasites.
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What is cancer?
Uncontrolled cell division
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What increases the chances of cancer?
Exposure to radiation and chemicals
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What is a tumor?
A mass of abnormal cells.
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What do viruses do in order to reproduce?
They invade a species.
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How are bacterial diseases treated?
Antibiotics
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How do parasites survive?
Feeding off of a host organism
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What is the role of the antigen in the immune response?
To trigger a response in the immune system.
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Why is it important that all cells have antigens?
White blood cells need to know to attack a foreign antigen.
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What make antibodies?
White blood cells
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What are antibiotics made of?
Protein
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What do antibodies do specifically?
Antibodies mark cells for white blood cells to attack and kill.
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What do antibodies have in common with enzymes?
They are made of protein, so they have a specific shape that determines their function.
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Why must a vaccine contain a weaker version of a pathogen?
That way the body can easily fight off the pathogen and remember how to fight it and it won't do any harm to the person.
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