Active transport and Organelles Flashcards
(26 cards)
Primary Active transport
the process is directly using ATP to send solutes against the gradient.
Sodium - potassium is found in all cells
secondary Active transport
Not directly using ATP.
Neighbor is paying for the Wifi but you use it too
Antiporters
Secondary transport, carries two substances across the membrane in opposite directions
Symporters
secondary trans, carries two substances across the membrane in the same direction
Vesicle
a small spherical sac formed by bedding off from the membrane.
Endocytosis
materials enter the cell in a vesicle formed of the cell membrane
Exocytosis
vesicles fuse with the cell membrane releasing their contents
Transcytosis
a combination of endo and exo cytosis
the Forms of Endocytosis
Receptor- mediated, Phagocytosis, bulk- phase
Receptor mediated endocytosis
substances are “caught” but receptors, the receptors then sink into the cell, forming a vesicle
Phagocytosis
A cells reaches pseudopod arms out to catch a virus and drags the virus into itself where it is destroyed
Bulk- phase endocytosis
if it was raining and every drop of water that hit the cell created a vesicle.
Cytosol
intracellular fluid surrounding the organelles, the site of ATP releasing chemical reactions. building blocks to cell maintenance, structure, growth
Organelles
specialized structures within a cell
Cytoskeleton
a network of protein filaments that extends throughout the cytosol. 3 types: micro, intermediate, microtubules
Microfilaments
generate movement and mechanical support
Intermediate filaments
resist mechanical stress
microtubules
move proteins and organelles, determine cell shape
Centrosome
an organelle located near the nucleus. has 2 components: 2 centrioles, and pericentriolar material
Cilia
short, hair like projections from the cell. moves fluids along a cell surface
Flagella
longer than cilia, they can move an entire cell. the only example is sperm
Ribosomes
sites of protein synthesis. can be attached to another structure or free in the cytosol
Endoplasmic Reticulum
network of membranes in the shape of flattened sacs or tubules
Rough Er
connected to the nucleus envelope is a series of flattened sacs with ribosomes attached to it. produces various proteins