A&P exam 1 (part 3)
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how many types of cells are there?
common features of a cell?
asymmetrical molecules that make up plasma membrane
part of phospholipid attracted to water
hydrophilic phosphate head
part of phospholipid that repels water
hydrophobic fatty acid tails
build double layer or phospholipids that includes proteins
act as channels through the phospholipid bilayer
embedded proteins indicate?
what gets in and goes out
made up of 2 subunits
2 subunits that free ribosomes are made up of?
when cell is actually making proteins its called
RNA is involved in
functions of ribosomes?
internal use of cell
membrane bounded organelle that has a phospholipid bilayer
rough endoplasmic reticulum
function of RER?
assembly and transport of proteins for export (secretion)
cells make the products, but it is?
transported and used somewhere else in the body by the RER
membrane bounded organelle that forms extensive networks in cells
smooth e r
the smooth ER does not
manufacture proteins because it has no ribosomes
the smooth er is?
very usueful to cells for many different things
functions of smooth ER?
removal of harmful substances from the body done by the SER? what specific cell uses this?
what cells use SER for steroid production?
what cells use muscle contraction of SER?
general functions of SER
internal highways inside the cell
4 parts of mitochondrion structure?
bounded by 2 membranes, both are phospholipid bilayers
folds in inner membrane
function of mitochondrion?
transform unusable energy to its useable form
electron transport system
in mitochondria, the Krebs cycle takes place in
create useable energy
the electron transport system in the mitochondrion occurs where?
structure of lysosome?
membrane bound sac (organelle)
what is found inside lysosome?
found inside lysosomes
cell produces them in advance
functions of lysosome?
break down worn out organelles
destroy ingested particles
cells inject bacteria to destroy it
stack of 4-8 hollow discs
function of Golgi?
packaging for export (secretion)
what organelle puts things together?
the Golgi is the center for?
similar by an assembly line
structure of centrioles?
microtubules (9 triplets)
centrioles are not bound by ?
always come in pairs
pairs of centrioles are?
always at right angles to each other
what are centrioles made of?
microtubules or straw like structures
function of centrioles?
organize mitotic spindles during cell division
centrioles are involved in?
cell division meaning theyre located near the nucleus
centrioles organize what?
the mitotic spindle
filaments are not an ?
organ, they are a structure
actin is a ?
most common filament, threadlike
actin in a muscle cell can?
change shape of cell
can occur individually or in bundles
reticular fibers are made of?
microfilaments can cause?
muscles to contract because it is thinner
thickest because of space in center
microtubules help to ?
3 forms of filaments?
microtubules help with?
largest structure in the cell
2 membranes of nucleus?
holes of portals on the nucleus
function of nucleus
when DNA is spread out?
when DNA moves together?
function of nucleolus?
has ribosomal DNA
where are genes located?
how many chromosomes to conceive?
46 chromosomes or 23 pairs
inside the nucleus
ribosomes are used for?
what is found in the nucleolus
DNA that codes for ribosome
many copies of ribosomes
cytoplasmic inclusions are not ?
examples of cytoplasmic inclusions
pigment that imparts color
do not dissolve in the cytoplasm
thick elastic fluid made of water and organic and inorganic compounds
why is a membrane important to the cytoplasm ?
to keep the cytoplasm together
A&P exam 1 (part 3)
cell structure and function Fall 2014