chapter 2 cell cytoplasm Flashcards
two types of cells
sex cells (gametes) that are haploid and somatic cells (diploid)
light microscopy
magnifies up to 1000 times and sometimes 2000 maximum
hemotoxolyn
bluish purple stain
transmission electron microscopy
magnifies more than light microscopy
-2 dimmensional image
color images
anything with color means that color was added artifically with an electron microscope
scanning electron microscop
shows three dimmensional image
cytoplasm parts
cytosol and organelles
plasmalemma
cell membrane (phospholipid bilayer)
mebranous organelles
-mitochondria, nucleus, endoplasmic reticulum, golgi apparatus, lysosomes and peroxisomes
nonmembranous organelles
-cytoskeleton, microvilli, centrioles, cilia, flagella and ribosomes
plasma membrane
has trans membrane proteins and there are also nuclear pores leading to the nucleus to let out any materials that have been synthesized in there
plasmalemma components and function
-phospholipids, glycolipids, protein and cholesterol
-called the bilayer
-physical isolation, regulation of exchange with the environment, sensitivity and structural support
endocytosis
phagocytosis, pinocytosis, receptor mediated endocytosis
active processes of plasmalemma
ion pumps use ATP to transport particles
exchange pump
uses two ions simultanesously in opposite directions
phagocytosisi
cell eating
pinocytosis
cell drinking
-pinch into cell
receptor mediated
ligands bind specific molecules to the receptors thereby allowing only specific molecules to enter the cell
nonmembranous organelles/ cytoskeleton
microfilaments, intermediate filaments, thick filaments, microtubules
microfilaments
ancho cytoskeleton to integral proteins, stabalize position of membrane proteins, anchor plasmalemma to the cytoplasm, produce movement of the cell
intermediate filaments
provide strenght, stabalize organelle, transport material within the cytosol
thick filaments
in muscle cells for contractions (MYOSIN)
thin filaments
ACTIN
microtubules
formation of centrioles that are used in cell reproduction to create spindle fibers to pull cell apart
microtubule examples
centrioles, cilia and flagella
ribosomes
free ribosome (floating in cytoplasm), fixed (attached to endoplasmic reticulum, BOTH CREATE PROTEIN
double membrane organelles
mitochondria, nucleus, e.r., golg, lysosomes, peroxisomes
nucleus
contains chromosomes
e.r.
produces proteins
golgi
modifies proteins, synthesize secretions, renew and modify the plasmalemma
lysosomes
contains cellular digestive enzymes, fuse with phagosomes to digest solids, recycle damaged organelles, can rupture which will kill the entire cell (AUTOLYSIS)
peroxisomes
contain catalase to break down hydrogen peroxide into water and oxidants, lots in the liver
rough er
fixed ribosomes, where protein enters,
smooth er
synthesizes lipids, steroids, carbs, stores calcium ions and detoxifies
cis golgi
where substances enter from the er
rans golgi
where they leave in vesicles
membrane flow
constant recycling of membrane, transport vesicles connect the er with the golgi and the secretory vesicles connect the golgi witht he plasmalemma
intercellular attachments
-communication junctions
adhering junctions (tight and anchoring)
cell reproduction
interphase, mitosis and cytokinesis
mitosis
prophase, metaphase, anaphase, telophase (cytokinesis overlaps with anaphase and telophase)
prophase
metaphase
anaphase
telophase
cytokinesis