26 terms

Parts and Functions of Cell Membrane and Excretory System- Bio Test 1/30

A. Glycerol + phosphate group
B. 2 fatty acids
A+B. phospholipid
combination of glycerol + phosphate group + 2 fatty acids
C. Cholesterol
controls fluidity (when under low temps, it increases fluidity; when under high temps, it decreases fluidity); helps self heal with lipids
D. Glycoproteins
carrier molecules; constantly moving; active and passive transport
E. lipid bilayer
boundary; not soluble in water; moves to create opening for small molecules (H2O, glucose, O2, CO2); passive transport
F. matrix or receptors
matrix: attachments that hold on; receptors: tell cell what it needs
A. renal pelvis
collects urine from nephrons
B. medulla
middle; contains nephrons; water is reabsorbed to balance the concentration of blood
C. cortex
contains parts of nephrons; blood is filtered
D. ureter
carries blood from renal pelvis to bladder
E. renal vein and artery
renal artery: carries unfiltered blood from heart to kidney; renal vein: carries filtered blood from kidney to heart
F. bladder
stores urine
G. urethra
urine leaves body through this tube
A. glomerulus
ball of capillaries
B, D. renal artery and vein
carries blood to or from the kidney
C, F. capillary/artiole
carries blood
E. loop of henle
rebalances blood; especially sodium and water (reabsorption and secretion)
G. glomerular capsule
filters blood
H. collecting tubule
collects all the materials; last step of reabsorption of water (ADH)
Proximal convoluted tubule/distal convoluted tubule
reabsorption through active and passive transport
Adrenal glands
make aldosterone
regulates secretion of H and K from blood into nephron
Does diffusion occur through veins and arteries?
NO, only capillaries
How much blood is constantly going through kidneys at any moment?
1/4 of your blood supply
antidiuertic hormone: when there is a lack of water, the pituitary gland creates more ADH. the ADH makes the cell membrane of the collecting duct more permeable to water, so more water is absorbed. this balances the water.