9/15 quiz Flashcards
(11 cards)
transport proteins
some facilitated T.P.s move solutes against concentration gradient
active transport
requires cells to expend energy (ATP)
ATP
adenosine triphosphate
nucleic acid
n-base adenine, sugar ribose, chain of 3 phosphates
ATP in transport
ATP used by carrier proteins use energy to push molecules against gradient (like pump)
sodium potassium pump
maintains gradient of Na/K positive ions across neuronal membrane
animal cells
high concentration of K+/ lower concentration Na+ inside cell, uses ATP to pump 3 Na+ out/ 2 K+ in
Why need Energy?
food is broken down by cellular respiration
turns food to ATP
break bond, reformed energy is being released
Where is energy?
fats and proteins
have to be converted to sugar
liver
If E from bonds released all at once
unusable E
ATP in cell
powers most cellular work
euglena (protise)- flagella as motor
mechanical
chemical
active transport
ATP cycle
ATP -> energy from cellular work -> ADP + P -> energy from catabolism