1/22/25 membranes Flashcards
solutes dispersed based on charge
Electrical reaction
solutes dispersed based on concentration gradient
chemical Reaction
channel v carriers
channels don’t require ATP
Carriers (facilitated transport) Maybe
what is a symporter/Co-Transport
channel in cell membrane where both substances move in same direction
Na+ and Glucose are a symporters in the gut
what is a Antiporter
channel where Substances move in opposite reactions
Facilitated Diffusion
Passive transport
carrier mediated
Primary Active Transport
directly consuming ATP to allow for you to move against the gradient
Na+/K+ Pump (sodium potassium pump)
Major player in many cells v^v^
maintains nerves and ion concentration
consumes ATP (Na out P in)
Secondary Active Transport
1 Glucose Symporter
2 Glut Transporter
3 Na+ K+ pumps
Why do you drink gatorade?
Get glucose in your system, glutose uptick
lots of sodium and carbohydrates
high bloodsugar =+glucose in cells
high sodium in gut = +glucose in bloodstream
is urine salty
no, our body tries to retain as much salt as possible
Vesicular transport
Active
has two types :endocytosis(Pull in) & Exocytosis(Push Out)
neurotransmitters use vesicular transport T/F
T
Glucose transporters
Glut1 Basal uptake and high affinity
Glut2 Glucose sensing Low affinity (faster after snickers bar
Glut 3 Basal uptake and high affinity
Glut 4 doesn’t exist on the membrane, its in a vesicle secretes insulin to help cell take glucose out of the blood through other 3
process of insulin
snickers eaten, blood-glucose up, pancreas secretes, vesicle secretes glucose transporters, they dock at membrane, do their thing, blood glucose goes down, insulin goes down, vesicles stop their thang
Diabetes means what
type 1 pancreas doesn’t secrete insulin/ vesicles don’t release glucose transporters
type 2 vesicles don’t respond very well
