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33 Cards in this Set
- Front
- Back
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What are organisms?
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they can thrive in certain kinds of conditions
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What is homeostasis?
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a constant, or stable, internal state that is maintained
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Hunger & Thrirst are......
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examples of Homeostasis
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Homeostasis includes the regulation of:
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O2 & CO2 levels
nutrient & waste product levels water balance body temperature |
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What is the Endoctrine System?
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glands that produce hormones
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The primary functions of the Endocrine System:
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to regulate growth & sexual development
to regulate the chemical reactions & metabolic funtion |
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homeostasis is....
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is a general mechanism called a negative feedback loop
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An example of negative feedback is....
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temperature regulation
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Glands & their function:
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Pituitary gland- releases hormones that control other glands and regulate growth
Thyroid gland- absorbs iodine from foof and regulates metabolism Thymus gland- allows body to make white blood cells Adrenal glands- prepares body for emergencies Pancreas- regulates blood sugar |
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What is the excretory system?
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collects waste & gets rid of it`
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Waste examples are:
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water
CO2 urine feces prespiration (sweat) |
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What is the urinary system?
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eliminates waste as liquid urine
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What are kidneys?
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major organs of the urinary system they remove excess water by filtering blood & there are two of them
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What are Nephrons?
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tiny structures that filter blood to produce blood
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What are Ureters?
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tubes that carry waste from kidneys to bladder
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What is the urinary bladder?
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a muscular organ that stores urine until it comes out of the body
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What is the urethra?
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a tube that opens to release urine
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What is the rectum?
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releases unusable remains of food or feces
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What are the lungs?
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remove water vapor & CO2 from the body when you exhale
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What is skin?
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excrets water & salts when overheated
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What is the liver?
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filters blood to remove harmful chemicals and bacteria
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Functions of the nervous system:
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Recieves info from inside & outside the body
control & directs bodys functions and responses helps maintain homeostasis |
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What is stimulis?
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anything that the body can react to internal or external
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what is response?
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the bodys reaction to a stimulis
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What is the spinal cord?
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a bundle of nerves that run down the spine that carry mesages from the brain to the body
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What are nuerons?
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basic units of the nervous system that carry messages called impulses & made up of a cell body dendrites an axons
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What are dendrites?
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they recieve mesages from other nuerons
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What are axons?
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carry messgaes away from the cells
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What is a synapse?
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small space across which an impulse moves from an axon of one nueron
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3 types of nuerons:
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sensory
internueron motornuerons |
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What is a sensory nueron?
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they recieve info for stimuli
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What is a internueron?
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sends impulses from sensory motornuerons only found in the brain and spinal cords
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What is a motornueron?
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carry impulses from the branch of the spinal cord
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