Cells Flashcards
building blocks of all living things
cells
bathed in a dilute saltwater solution called interstitial fluid derived from the blood
cells
cells are organized into three main regions?
nucleus
cytoplasm
plasma membrane
control center of the cell
Nucleus
contains genetic material (DNA)
nucleus
three main regions of nucleus
nuclear membrane
nucleolus
chromatin
barrier of the nucleus
nuclear membrane
consists of a selectively permeable, double phospholipid membrane
nuclear membrane
fluid similar to cytoplasm
chromatin
consists of nuclear pores that allow for exchange of material with the rest of the cell
nuclear membrane
sites of ribosome production and partial assembly
nucleoli
a protein-lined channel in the nuclear envelope that regulates the transportation of molecules between the nucleus and the cytoplasm
nuclear pores
after nucleoli, the ribosomes then migrate to cytoplasm through what?
nuclear pores
composed of unwound DNA and protein - used for making proteins
chromatin
scattered throughot nucleus
chromatin
condenses to form chromosomes when the cell divides
chromatin
barrier for cell contents
plasma membrane
water loving
hydrophilic heads
wate fearing
hydrophobic tails
other materials in the plasma membrane
protein
cholesterol
glycoprotein
receptors, cell recognition and communication, channels for transport
protein
keep membrane fluid and stable
cholesterol
receptors, cell-to-cell interactions
glycoproteins
finger-like projections that increase surface area for absorption
microvilli