Excretion Flashcards
What are the two main functions of the Kidney?
- To release metabolic waste products
2. To regulate the amount of water, fluid minerals, chemicals in the blood and in the urine
How is pressure increased in Bowmans Capsule
The efferent artiole has a tighter diameter than the afferent artiole increasing pressure
What are the microscopic filters inside the kidney?
Nephrons
What are the main structures of the kidney?
The cortex, medulla, renal capsule, ureter, renal artery, renal vein, medula pyramids, nephrons
What are the main structures in the Nephron?
Bowmans capsule, glomerulus, proximal convoluted tubule, loop of henle, distal convoluted tubule, collecting duct
Where is glucose reabsorbed through selective reabsorption?
In the Proximal Convoluted Tubule and it is reabsorbed through active transport. glucose not being reabsorbed and being present in urine is a sign of diabetes.
What is the function of the loop of Henle and the collecting duct?
In these structures water and ions are reabsorbed through osmosis.
What is selective reabsorption?
It is the process where water and glucose along with some other small molecules are reabsorbed back into the bloodstream.
Where is water selectively reabsorbed?
The Loop Of Henle
What is Ultrafiltration?
It is the process of filtering small molecules through the glomerulus to the Bowman’s Capsule.
Where is ADH released from?
The Anti Diuretic Hormone is secreted from the Pituitary gland which is signalled by the Hypothalamus.
What is the effect of ADH?
ADH travels through capillaries to the collecting duct of the nephron and makes the walls more permeable so water can be easily reabsorbed through osmosis.
Why is ADH released?
ADH is released when the concentration of water in the blood is too low and water needs to be reabsorbed to be used.
What is the Benedict’s test?
The Benedict’s test is a test for glucose. if glucose is present then the solution will turn brick red. you must heat up the Benedict’s in heat bath.
What is Excretion?
It is the process of removing metabolic wastes from the body.
