BIOLOGY SUMMER CHAPTER 1 Flashcards
Cell membrane
first layer inside the cell wall
does Homeostasis cause a balance? if so how?
Controls what enters and exits the cell to maintain balance
it also provides protection and support for the cell
what does the lipid bilayer compose of?
2 layers of phospholipids
what is Polar and does it fear water
is the phosphate head that is water loving
what is Non polar and does it like water?
is the fatty acid tails what is water fearing
what is a Selectively permeable
allows some molecules in and others out
what are the two Types of cellular transport
passive transport
active transport
Does passive transport use energy?
No the cell does not use energy.
comes from an area of HIGH concentration to LOW concentration
high to low
Does active transport use energy?
yes
What other types passive transport of cells dont use energy
Diffusion
facilitated diffusion
and
osmosis
Does active transport use energy?
yes,
it comes from a concentration of low to high
What types of active transport cells use energy?
Protein pumps
endocytosis
and
exocytosis
what type of movement is Diffusion, how far will it go, and does it use lipid bilayer or channel protein
random movment from H>L
will continue until equilibrium is reached (evenly spaced))
uses lipid bilayer
what type of movement is Facilitated diffusion, does it use channel proteins or lipid bilayer
diffusion of specific particles( larger or charged molecules)
uses channel protein
what type of diffusion is Osmosis
what type of membrane does it travel through?
and is it from a high concentration to a low concentration
diffusion of water
through selectivley permeable membrane
yes
