C2 bs Flashcards
Organelle
A small structure in a cell that is surrounded by a membrane and has a specific function.
nucleus
the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass
lysosome
A sac-like compartment inside a cell that has enzymes that can break down cellular components that need to be destroyed. (digestion) used to defend from invading bacteria, destroy damaged cell organelles and controlled digestion of certain tissues during development.
golgi apparatus
Flat disc-shaped sacs involved with secretion. Used for secretion of substances like hormones, enzymes etc. Receives from the endoplasmic reticulum, it packages things for export in vesicles so they can leave the cell LIke a packaging facility preparing to export materials
Chloroplast
a plastid that contains chlorophyll and in which photosynthesis takes place.
6H2O+6CO2=C6H12O6+6O2
endoplasmic reticulum
Like the subway in a cell for transport. Interconnected small tube that branch from the nuclear membrane.
Can be rough (with ribosomes) or smooth (without
ribosomes. Rough - involved in
making proteins. Smooth- fats and oils
active transport
In cellular biology, active transport is the movement of molecules or ions across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Active transport requires cellular energy to achieve this movement
Hypertonic
A hypertonic solution is any external solution that has a high solute concentration and low water concentration compared to body fluids. In a hypertonic solution, the net movement of water will be out of the body and into the solution.
carrier proteins
have ability to attach to larger molecules. Carrier proteins change shape and physically move the molecules across the membrane into the cell.
(non tube one)
carrier proteins
have ability to attach to larger molecules. Carrier proteins change shape and physically move the molecules across the membrane into the cell.
(non tube one)
Channel proteins
Create pores or channels through which small water-soluble particles are able to move. The movement happens in response to the concentration gradient.
exocytosis
When the cel wants to get rid of large waste particles, or needs to release a product molecule- A vesicle surrounds the particle, then moves to the plasma membrane and fuses with it. The vesicle then ruptures, releasing its contents into the surroundings.
ENDOCYTOSIS
A vesicle forms around the particle and the cell membrane pinches off around it so that the vesicle is inside the cell.
cell/plasma membrane
a microscopic membrane of lipids and proteins which forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and regulates the passage of molecules in and out of the cytoplasm.
Endoplasmic reticulum
Like the subway in a cell. For transport. Can be rough (with ribosomes) or smooth (without ribosomes).
Rough - involved in making proteins Smooth, involved in fat and oil. Branch off the nuclear membrane ig?