IB Cell Biology

Cell Theory

Created by Matthias Schleiden, Theodore Schwann, and Rudolf Virchow

All living organisms are composed of cells, cells are the basic unit of structure & function, and all cells come from pre existing cells

Biogenesis

The idea that all cells come from pre existing cells

Functions of Life

Metabolism, response, homeostasis, growth, reproduction, excretion, nutrition, etc.

Homeostasis

the body’s natural ability to maintain internal stability despite external conditions and changes

Excretion

the process of eliminating excess waste from the body

Prokaryotic Cell

Smaller, lacks a nucleus & membrane bound organelles

Eukaryotic Cells

larger cells containing a nucleus, nucleolus, & membrane bound organelles, does not contain plasmids

Plant Cell

Eukaryotic, contain a cell wall & chloroplast, lack centrioles, contain a large vacuole in the center of the cell and a nucleus in the side of the cell

Cell Membrane

Responsible for regulating what enters and leaves the cell and is semi permiable

Cytoplasm

Jelly like liquid which fills excess space in the inside of a cell

Nucleus

Contains DNA and controls cell activities, is surrounded by a nuclear membrane

Mitochondria

Controls and produces ATP, has its own DNA and can replicate independently

Ribosomes

Make protein

Golfing Apparatus

Sorts, labels, and packages materials ensuring they reach the right place

Modifies proteins and lipids

Lysosomes