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dgangell Excretory
| Question | Answer |
|---|---|
| Negative feedback | type of regulation that responds to a change in conditions by initiating responses that will counteract the change |
| Urea | Compound formed in the liver from ammonia and carbon dioxide and excreted primarily by the kidneys |
| Hormone | signal molecule released into the bloodstream that triggers particular responses |
| Endocrine gland | Organ of the endocrine system that secretes hormones |
| Target cell | cell with chemical receptors that cause it to respond to a particular hormone |
| Excretion | removal of nitrogen-containing wastes from the body |
| Kidney | main organ of the excretory system; excretes waste products and regulates water and salt balance |
| Urine | liquid composed of water, urea, and other waste products; produced by the kidneys |
| Ureter | tube extending from each kidney that carries urine to the urinary bladder |
| Urinary Bladder | sac that stores urine until it is eliminated from the body |
| Urethra | tube leading from the urinary bladder through which urine exits the body |
| Nephron | one of millions of tubes and its associated blood vessels in a kidney that extracts filtrate from the blood and refines it into urine |
| Glomerulus | ball of capillaries in each nephron of a kidney that is the site of filtration |
| Dialysis | treatment that processes blood outside the body |