Chaper 1 Book 2 Flashcards
(19 cards)
Cell
In biology, the smallest unit that can perform all life processes ; cells are covered by a membrane and have DNA and cytoplasm
Cell Membrane
A phosphoric layer that covers a cell’s surface ; acts a barrier between the inside of a cell and the cell’s enviroment
Organelle
One of the small bodies in a cell’s cytoplasm that are specialized to perform a specific function
Nucleus
In a Eukaryota cell, a membrane-bound organelle that contains the cell’s DNA and that has a role in the process such as growth, metabolism, and reproduction
Prokaryotes
An organism that consists of a single cell that doesn’t have a nucleus
Eukaryote
An organism that is made up of cells that have a nucleus enclosed by a membrane : Eukaryotas include animals, plants, and fungi, but not archaebacteria or eubacteria.
Cell Wall
A rigid structure that surrounds the cell membrane and provides support to the cell.
Ribosome
Cell organelle composed of RNA and protein : the site of protein synthesis.
Endoplasmic Reticulum (ER)
A system of membranes that is found in a cell’s cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids
Mitochondrion
In eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration.
Golgi Complex
Cell organelle that helps make and package materials to be transported out of the cell.
Vesicle
A small cavity or sac that contains materials in a eukaryotic cell
Lysosome
A cell organelle that contains digestive enzymes
Tissue
A group of similar cells that perform a common function
Organ
A collection of tissues that carry out a specialized function of the body
Organ System
A group of organs that work together to perform body functions.
Organism
A living thing : anything that can carry out life processes independently.
Structure
The arrangement of parts in an organism
Function
The special, normal, or proper activity of an organ or part.
