Chapter 3 Flashcards
4 elements of cell theory
1) cell most basic part of body
2) activity of organism depends on activity of cells
3) certain cells do certain things
4) continuity of life has a cellular basis
3 regions of the nucleus
1) Nuclear envelope
2) nucleolus
3) Chromatin
nucleoli
assemble ribosomes, found in nucleus
phospholipid heads
hydrophilic
phopholipid tails
hydrophobic
proteins in cell membrane
1)enzymes, 2)receptors, 3)transport
Tight Junctions
impermeable, keep substances from passing in between cells
desmosomes
prevent cells from being pulled apart. anchoring cells
gap junctions
connect cells so that they can communicate with each other through hollow tubes
which cell has no nucleus
red blood cells
_____ cells do not divide
brain cells
Site of Atp synthesis
mitochondria
site of protein synthesis
ribosome
holds ribosomes and transports proteins throughout the cell
Rough endoplasmic reticulum
lipid motabolism
smooth er
modifies, packages, and transports proteins
golgi apparatus
three pathways from the Golgi apparatus
1) Secretory: goes outside of the cell
2) In House: fuses with plasma membrane
3) lysosomes: digestive enzymes transported to lysosomes
digest worn down or non-usable cell structures
lysosomes
contain oxidase enzymes to detoxify harmful substances like alcohol
peroxisomes
generate spindle fibers during mitosis
centrioles
where can cilia be found?
lining the trachea to move mucus
cells that secretes cable like fibers
fibroblast
carries oxygen in the bloodstream
erythrocyte
covers and lines body organs
epithelial cell
cell that moves organs and body parts
skeletal and smooth muscle cells
cell that stores nutrients
fat cells
cell that fights disease
macrophage
cell that gathers information and controls body functions
nerve cell
cells of reproduction
oocyte, sperm
solvent
what is being dissolved into