biology Positive and negative feedback, organ systems
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Homeostasis | maintaining (keeping) a stable internal environment -organisms must have homeostasis to survive
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| stimulus | an environmental change that affects the activity of an organism - may come from an organism or external environment
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| Response | The way an organism reacts to stimuli
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| Why is homeostasis important to an organism? | Because cells and organs of lLiving organisms can not continue to live Unless Homeostasis is maintained
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| Give an example of a stimulus. What is its response? | Stimulus is you smell or see food. The response would be you get hungry so you eat
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| How are organisms organized from smallest and simplest to largest and most complex? | Cells->. Tissues-> Organs -> organ systems
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| What is Negative feedback. | Your systems need to slow down or completely stop a process that is happening. REDUCES the original effect of a stimulus)
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| What is positive feedback? | The action being stimulated more. (ADDS to original stimulus)
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| Give example of. Negative feedback | Body temp. Increases and body sweats
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| Give an example of positive feedback | Body temp. Decreases, body shivers and temp increases
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| Name the organ systems in your body | Digestive - Cardiovascular -urinary - nervous and endocrine
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| What is the function of the digestive system ? | Makes sure the body has nutrient molecules
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| WhAt is the function of the cardiovascular system? | Transports the nutrient molecules through the body
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| What is the function of the urinary system. | Rids the system of waste
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| What is the function of the nervous system? | Makes sure all the other systems are doing what they are supposed to do
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| Hypothalmus | part of the brain that controls body temp.
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| what is normal body temp? | 37 degrees C
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| what is an organ system? | a group of organs that work together
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Created by:
mrs Cunningham
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