Term
| What are the functions of the urinary system? |
|
Definition
filters the blood - removes nitrogenous wastes, regulates pH of blood and osmoregulates (salt and water balance), removes toxic wastes and drugs
produces urine - urine contains wastes, toxins, drugs, ions and excess water |
|
|
Term
| What are the structures involved in the urinary system and their basic functions? |
|
Definition
Kidneys - filters the blood and produces urine
Ureters - transports urine from the kidneys to the bladder
Urinary Bladder - stores urine
Urethra - transports urine from the bladder out of the body |
|
|
Term
| What is the functional unit of the kidney? |
|
Definition
millions of nephrons
nephron being a tube lined with simple squamous epithelial tissue surrounded by capillary beds
involved in:
1. filtration 2. tubular reabsorbtion 3. tubular secretion 4. excretion of urine |
|
|
Term
| What is the structure of a nephron and the four main processes involved in its functioning? |
|
Definition
a nephron is a tube lined with simple squamous epithelial tissue and surrounded by capillary beds
1. filtration - blood is filtered
2. tubular reabsorbtion - substances that are useful are saved back into blood
3. tubular secretion - substances that are harmful or in excess are secreted into the tube forming urine
4. excretion of urine |
|
|
Term
| What is the composition of urine? |
|
Definition
it is clear and yellow due to urochrome (from hemoglobin breakdown)
composed of ions such as Na+, K+ and bicarbonate
N compounds such as Urea, Uric Acid and Ammonia
Creatine from creatine phosphate metabolism in muscles
excess water |
|
|
