Urine Production Flashcards
Where does ultrafiltration occur?
In the Bowman’s Capsule
Which arteriole delivers blood to the glomerulus?
Afferent arteriole
Explain how the cells of the PCT are adapted
Microvilli - to increase surface area
Mitochondria - to produce energy in the NaK pumps
Transport proteins - transport glucose and sodium
NaK pump - pumps sodium out
Folds in the membrane
Give one component of the blood which is not normally present in the filtrate
Red blood cell
What allows the filtrate to move in to Bowman’s capsule?
High pressure in the glomerulus therefore the filtrate moves
Why are mitochondria important in the cells of the PCT?
They produce energy in the form of ATP to work the NaK pump
Why is sodium concentration gradient important to allow glucose to enter?
Co transport proteins allow glucose and sodium to diffuse in at the same time
What happens in the ascending limb of the Loop of Henle?
Na ions are actively pumped out
Why does water not move out of the ascending limb of the Loop of Henle?
The wall of the ascending limb is impermeable
What happens in the descending limb of the Loop of Henle?
Water moves out through osmosis
How does urine move from the collecting duct to the bladder?
Through the ureters
What is the role of the basement membrane of the Bowman’s capsule?
It acts as a filter
What is the role of the podocytes?
Make gaps in the cells to allow fluid to go through
Where does selective reabsorption happen?
In the Proximal Convoluted Tubule
Name the process used to reabsorb water from the filtrate into the blood
Osmosis
