test 4&5 Flashcards
tiny spherical bodies composed of RNA and protein; floating free or attached to a membranous structure (the rough ER) in the cytoplasm.
Ribosomes
Site of protein synthesis; proteins are what make up all of what you are, some are floating around in the cytoplasm and also some are embedded on the surface of the rough ER.
Ribosomes
membranous system of tubules that extends throughout the cytoplasm; this variety is responsible for storage and transport of the proteins made on the ribosomes to other cell areas. Studded with ribosomes.
Rough Endoplasmic Reticulum
membranous system of tubules that extends throughout the cytoplasm; this variety has no ribosomes embedded. It’s function is synthesis of steroid and lipids (fatty acids), lipid metabolism, and drug detoxification.
smooth Endoplasmic Reticulum
stack of flattened sacs with bulbous ends and associated small vesicles; found close to the nucleus. Plays, a role in packaging proteins or other substances for export from the cell or incorporation into the plasma membrane and in packaging lysosomal enzymes.
Golgi aparatus
various-sized membranous sacs containing digestive enzymes including acid hydrolases; function to digest worn out cell organelles and foreign substances that enter the cell. Have the capacity of total cell destruction if ruptured and are for this reason referred to as “suicide sacs”.
Lysosomes
small lysosome-like membranous sacs containing oxidase enzymes that detoxify alcohol, free radicals, and other harmful chemicals. They are particularly abundant in liver and kidney cells.
peroxisomes
Generally rod-shaped bodies with a double membrane wall; (looks like a kidney bean) inner membrane is shaped into folds, or cristae: contain enzymes that oxidize foodstuffs to produce cellular energy (ATP); often referred to as the “powerhouse of the cell”.
mitochondria
the inner membrane of the mitochondria shaped into folds.
cristae
the fluid found in the mitochondria
matrix
the bulbous round ends on the golgi aparatus
transfer vesicles
the long channel parts of the golgi aparatus
cistern
the framework of the cell; provides structure and movement; function in intracellular transport, made up of protein structures (long and rod-like in shape).
cytoskeleton
the three parts of the cytoskeleton
micofilaments, intermediate filaments, and microtubules
rods or string like looking things that move stuff through the cell, formed largely of actin, a contractile protein, and thus are important in cell mobility, particularly in muscle cells.
microfillaments
stable elements composed of a variety of proteins and resist mechanical forces acting on cells
intermediate filaments
important for cell division, make up the centrosome, the internal structure of the centrioles and help determine cell shape.
microtubules
outer surface, relatively flexible, determines what gets into the cell and what gets out of the cell, it is selective in terms of what it is going to let in and what it is going to let out, ensures cell works properly
plasma membrane
all the stuff inside the cell,
cytoplasm
structures you find inside the cell
organelles
contract (shorten in length) to move bones.
skeletal muscle cells
use cilia (hairlike processes) to move substances along the surface of the cells.
ciliated cells
carry genetic information through the female reproductive tract and try to insert this genetic information into an egg (fertilization)
sperm cells
contain large amounts of hemoglobin, a red pigment that binds oxygen.
red blood cells
defend the body from pathogens and cancerous cells.
white blood cells
needed to form cilia and flagella; active in mitosis and meiosis.
centrioles
usually depicted as two cylinders that are perpendicular to one another, made up of micro tubules, generate the mitotic spindle which organizes your genetic materials during cell division, usually only have one of them in the cell.
centrosome
folds of the plasma membrane tat increase its surface area
microvilli
area of the cell that includes the cytosol and organelles
cytoplasm
contains the cells hereditary information in genes, directs cellular activities
nucleus
transports things through the rough er through the golgi away from the golgi etc., a pinched off piece of membrane with some stuff on the inside.
vesicles
assembly site for ribosomes
nucleolus
long thin strands within nucleus. Each strand composed of one DNA molecule and associated proteins.
chromatin
makes ATP through aerobic cellular respiration
mitochondria
long cylindrical cells found in the nucleus
skeletal muscle cells
not surrounded by a membrane but they break down proteins, either ones that are not working the way they should or ones that you don’t want around anymore and they break them down and recycle them.
protiosomes (trash can, cylinder with a lid)