Chapter 1.02 Flashcards
(48 cards)
what are examples of Membrane boiund organelles?
Nucleus, mitochodria, ER, golgi comples, lysosomes
What are examples of non-membrane bound organelles?
Ribosomes, centrosomes, basal bodies
What is the name of the intracellular fluid in a cell?
cytoplasm/cytosol
What does it mean that the plasma membrane is made up from amphiphilic molecules?
molecule contians both hydrohillic and hydrophobic parts
In the fluid mosaic model it contains protiens and cholesterol, What are thier roles?
Cholesteral- fluidity
Membrane protiens- pumps and diffusion of molecules
What is the name of the carbohydrate molecule that spread across the plasma membrane of a cell, that provides signaling and cell recognition?
Glycocalyx
What is layer is the plasmamembrane/ plasmalemma made of?
Phospholipid bilayer
what is the differace b/w endocytosis and exocytosis?
endo- uses coated vesicals to allow molecule into cell
exo-open secretory vesicle to let out the molecule of cell
what does it mean that the plasma membrane has slective permeability?
Small non-polar molecules can pass through easily
larger need other transport mechanism
There are three types of protien fiber present throughout the cytosol, that help give structure to the cell this is called?
cytoskeleton
Give the :
Size
protien
functio/role in cell
Microfilament
7 nm diameter
actin protien filament in helix]
form terminal web
Give the:
Size
protien
functio/role in cell
Intermediate filaments
8-10nm diameter
fiberous protien
structural role
Give the
Size
protien
functio/role in cell
microtubules
25nm diameter
tubulin protien arranged in a tube
important for cillia, centrioles
What are the diferent types of cellular projection?
Microvilli
sterocillia
cillia
flagella
Short, fingerlike projections of
the plasma membrane that increase SA, and is nonmotile + used for absorption. This is ?
microvili
Related to microvilli, but are much longer. Nonmotile.
Increase SA: Vol ratio, or may be sensory
Sterocillia
Much longer than microvilli. 9x2 + 2
internal structural pattern of microtubules.
Often motile. Most non-epithelial cells have
a nonmotile sensory primary cilium.
cilia
Long, forming the motile tail of a
sperm. Same internal structure of
microtubules as cilia.
flagella
what does axoneme mean in relation to cillia?
9 sets of doublet
microtubules, with a central
pair
what form a centrosome?
Two centrioles, one arranged at a right angle
to the long axis of the other, along with
pericentriolar matrix
Microtubules arranged as 9 sets of triplets in
a circular pattern
Centrioles
where do cilia attach to in a cell?
Cilia attach to dense Basal bodies at the
apical margin of the cell
Double membrane:
- Outer membrane encloses organelle
- Inner membrane forms cristae
this descibes
Mitochondria
