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19 Cards in this Set
- Front
- Back
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Homeostasis
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The ability to keep internal conditions stable regardless of outside environment
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What are some things homeostasis controls?
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body temperature, levels of: oxygen, CO2, water, sugar, urea
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what does the nervous system consist of?
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brain, spinal cord, nerve network
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what are the functions of the nervous system?
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transmit electrical signals around the body, brain interperates electrical signals and sends appropriate responses to the rest of the body
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what are the functions of the endocrine system?
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secretes hormones that target particular points in the body, controls homeostasis, growth, puberty, and reproduction
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what does the immune system consist of?
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skin, stomach acid, white blood cells, mucus in nose and ears.
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what are the 4 main functions of the immune system
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1. keeps pathogens from entering the body.
2. Mucus traps pathogens so the body can expel them 3. Stomach acid breaks down any pathogens ingested on food. 4. White blood cells recognize and neutralize(destroy) pathogens once they enter the blood stream |
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Pituitary gland.
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secretes hormones that affect other glands and organs, growth/puberty hormones
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thyroid gland
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controls the rate at which you use energy/metabolism
T3 & T4, thyroxine |
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parathyroid gland
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regulates the calcium levels in your blood
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adrenal glands
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help your body respond to danger, adrenaline
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pancreas
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regulates BG levels, insulin and glucagon
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ovaries
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(females) produce hormones need for reproduction, estrogen
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testes
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produces male hormones needed for reproduction, testosterone.
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hormone
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a chemical messenger made in one cell/tissue that causes a change in another cell/tissue in another part of the body.
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gland
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a group of cells that make special chemicals for your body
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What actions does your body take when you're too hot? ( homeostasis)
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1. Hair relaxes allowing air currents to get closer to the skin.
2. We sweat 3.our blood vessels dilate, to bring more blood to the surface of our skin to allow heat to escape |
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What does our body do when it gets too cold?
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1. Hair rises( stops air currents from getting to our skin)
2. We stop sweating 3. Skeletal muscles contract which causes heat (shivering) 4. Blood vessels become narrower to keep heat from escaping. |
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pineal gland
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controls sleep patterns, melatonin
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