ch 3 Flashcards
major body cavities
cranial
thoracic
abdominopelvic
fluid filled compartments
circulatory system
eyes
cerebrospinal fluid
pleural and pericardial sacs
three fluid compartments
plasma
interstitial fluid
intracellular fluid
four cell membrane functions
physical isolation
regulation of exchange with the environment
communication btw cell and environment
structural support
fluid mosiac model
see diagram
organization of typical animal cell
see diagram
cytosol
fluid portion of cytoplasm
inclusions
lipid droplets
glycogen granules
ribosomes
protein fibers
cytoskeleton
centrioles
cilia
flagella
organelles
mitochondria
endoplasmic reticulum
Golgi
lysosomes
peroxisomes
microfilaments
actin fibers
intermediate filaments
keratin
neurofilaments
microtubules
tubulin
actin
associates with myosin for muscle contraction
keratin
hair and nails, protective barrier of skin
tubulin
movement of cilia, flagella , and chromosomes, intracellular transport of organelles, cytoskeleton
five major functions of cytoskeleton
cell shape
internal organization
intracellular transport
assembly of cells into tissues
movement
why must protein assembly happen in seperate compartments?
must protect DNA so assembly of proteins has to happen outside of nucleus
extracellular matrix structures
synthesized and secreted by cells, composed of proteoglycans, insoluble protein fibers
7 main categories of connective tissue
loose connective tissue
dense irregular connective tissue
dense regular connective tissue
adipose
blood
cartilage
bone
pluripotent
cells can become anything except go back from placental
totipotent
cells can become ANYTHING
multipotent
cells can pursue multiple routes but not all
hollow organs
heart, lungs, blood vessels, intestines
lumen
interior of any hollow organ
extracellular fluid
plasma, interstitial fluid
intracellular fluid
just intracellular fluid
lipids
phospholipids, sphingolipids, cholesterol
Phospholipid structures in aqueous (solvent = water) solutions
Bilayer, micelle, liposome
what are lipid rafts made of
sphingolipids and lipid anchored proteins
differentiation
selected genes are active to lead to specialized cell
centrosome
assembles tubulin monomers into microtubules
centrioles
direct DNA movement in cell division
cilia
fluid movement across cells
flagella
cell movement through fluid
myosins
muscle contraction
dyneins
movement of cilia and flagella
kinesins AND dyneins
movement of vesicles along microtubules
lysosomes
break down bacteria and old organelles
peroxisomes
break down fatty acids and toxic materials
golgi apparatus
sorts, modifies, and packages proteins into vesicles
rough ER
synthesis of proteins
smooth ER
synthesis of fatty acids, steroids, lipids
nuclear envelope
two membranes with pores
chromatin
DNA and associated proteins
nucleoli
control synthesis of rRNA
histology
study of tissue structure and function
extracellular matrix
synthesized and secrete by cells
composition varies from tissue to tissue
proteoglycans
glycoproteins
insoluble protein fibers
collagen, fibronectin, laminin
cell adhesion molecules
membrane spanning proteins
gap junctions
communicating junctions
tight junctions
occluding junctions anchoring junctions
cell matrix with integrins
hemidesmosomes, focal adhesions
cell-cell
with cadherens
exchange epithelium
very thin, flattened cells that allow gas exchange
what do exchange epithelium line
blood vessels and lungs
what are exchange epithelium classified as
simple squamous epithelium
what is exchange epithelium call in the heart and blood vessels
endothelium
transporting epithelium
cell shape– cuboidal columnar, many mitochondria, can be regulated to respond to stimuli
basolateral membrane
faces ECM
cilia
move fluid and particles in respiratory system and female reproductive tract
protective epithelia
prevent exchange
what do protective epithelia protect
areas subject to mechanical and chemical stress
exo:endo function of pancreas
98:2
secretory epithelia
produce and secrete a substance into the extracellular space
exocrine glands
release products into external environment
goblet cells
single exocrine cells that produce mucus
endocrine glands
release hormones into extracellular compartments