excretion Flashcards
1
Q
glomerulus
A
- knot of capillaries
- high blood pressure
- pushes plasma into bowmans capsule (passive)
- “filtration”
2
Q
bowmans capsule
A
- catches all the materials forced out of the blood
- connected to the proximal tubule
3
Q
proximal tubule
A
- active transport of Na+, glucose, other molecules back to the blood
- “reabsorption”
4
Q
descending loop of henle
A
- permeable to water
- passive water reabsorption to the blood
5
Q
ascending loop of henle
A
- impermeable to water
- h2o will stay in blood
- “reabsorption”
- Na+ is actively transported out to blood
6
Q
distal tubule
A
- other waste substances are actively secreted from blood –> filtrate
- passive and active transport
- “reabsorption and secretion”
7
Q
reabsorption
A
- C6H12O6 is actively reabsorbed
- Na+ is actively reabsorbed
- Cl- is passively reabsorbed (follows Na+)
8
Q
secretion
A
- active transport of waste materials from the blood to the filtrate
- this includes H+ ions, K+, medications, poisons
9
Q
osmoreceptors
A
- tissues
- shrink when the blood surrounding them is too concentrated (in ions)
- this signals the pituitary in the brain to release ADH
10
Q
ADH
A
- antidiuretic hormone
- signaled by the pituitary
- acts on the cells of the distal tubule
- increases permeability
11
Q
diabetes inSIPidus
A
- disorder
- cannot release ADH (no pee hormone)
12
Q
aldosterone
A
- hormone
- produced in the adrenal glands
- released when blood pressure is too low
- acts on the distal tubule to increase the active reabsorption of Na+
13
Q
ANP
A
- atrial natriuretic peptides
- blockes aldosterone
14
Q
diabetes mellitus
A
- inability to produce or use insulin from the pancreas
- kidneys will not reabsorb the glucose in the proximal tubule
15
Q
biuret reagent
A
tests for protein
