Flashcards
Excretion flashacards
Cards in this deck (16)
- 1What is anti-diuretic hormone?It is the hormone that controls water concentration in the body by changing how permeable to water the collecting duct nephrons in the kidney are are
- 2What is the function of the bladder?Where urine is held until excretion
- 3What and where is the bowman's capsule?located in the kidney, it is the 'cup shaped' bit at the start of the nephron where ultra filtration occurs (no red blood cells or proteins)
- 4What is the collecting duct?Collecting duct is located in liver nephrons, it is the tube like structure where water is reabsorbed
- 5What are the convoluted tubules?two bits of the nephron (kidney) which are close to a capillary (in the proximal convoluted tubule necessary glucose is reabsorbed)
- 6what is Glomerular filtrate? what does it consist of?Liquid (in bowman's capsule) produced by ultra-filtration; consists of glucose, water,mineral ions (eg:sodium), hormones, vitamins and urea. blood cells and proteins cant get through because they are too big
- 7What is the glomerus?loads of capillaries that work with the bowman's capsule (provides blood to be filtered)
- 8what is the hypothalamus and where is it?hypothalamus is located in the brain, it monitors the water content of the blood- tells pituitary glad to secrete ADH
- 9What is the loop of Henle?tis the bit of the nephron which goes slightly into the medulla of the kidney
- 10what is a nephron?tiny bit of the kidney (tubule) where ultra-filtration and re-absorbtion take place- creates urine
- 11what is osmoregulation?regulation of the water content/concentration in the blood
- 12what is selective re-absorption?the absorption of certain things than others, like water in the collecting duct
- 13what are ureters?they are tubes that connect the kidneys to the bladder
- 14what is the composition of urine?water, urea and salts
- 15what are the components of the urinary systemkidneys, ureters, bladder and urethra
- 16What is the effect of ADH on the collecting ductthe secretion of ADH makes the collecting duct more permeable to water and so it re absorbs more water
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- IGCSE edexel Biology Flashcards on Excretion flashacards, created by khtsmith09 on 03/11/2015.
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