I hate school Flashcards
How does cell-cell recognition take place?
by binding to surface molecules
How does water diffuse across a membrane?
from low concentration to high concentration
what is tonicity?
the ability of a solution to cause a cell to gain or lose water
what’s an electrogenic pump?
a transport protein that generates voltage across a membrane
How do small molecules pass through the membrane?
by diffusion or transport proteins
How do large molecules pass through the membrane?
through vesicles
what is exocytosis?
when a vesicle spits out its contents
What is endocytosis?
When a cell takes in macromolecules
What plus what equals electrochemical gradient?
chemical force + electric force
What are the features of all cells?
plasma membrane, ribosomes, DNA, cytosol
What’s in animal cells that are not in plant cells?
lysosomes, centrioles, flagella
What is Cristae?
The folds in the inner membrane of the mitochondria
What is the mitochondrial matrix?
The space within the inner membrane that includes enzymes, DNA, and ribosomes.
What are amyloplasts?
in plant cells and stores starch
What’s a chromoplast?
like a chloroplast but produces yellow/orange pigments.
What are peroxisomes?
contain enzymes that remove hydrogen atoms from various substrates and produce hydrogen peroxide
What are the functions of microtubules?
cell shape, motility, chromosomes movement, and organelle movement
What are the functions of microfilaments?
cell shape, muscle contraction, motility, and cell division
What are the functions of intermediate filaments?
cell shape, anchor organelles, and form the nuclear lamina.
What are tight junctions?
present in animal cells that prevent leakage of fluid
What are gap junctions?
provide channels in between animal cells
What are desmosomes?
they fasten cells together
What are centrosomes?
a region located near the nucleus made out of microtubules
What are centrioles?
composed of 9 sets of triplet microtubules arranged in a ring (looks like licorice)
