Chapter 4 Flashcards
(37 cards)
Lipid
Fat
What is a cell membrane
An external boundary around a cell made of lipids and protein controls what goes in and out of the cell
Cytoplasm
Jelly like substance made of water,glucose,fat,and other substance. used by the cell.the cytoplasm fills the cell and surrounds the organelles inside the cell
Characteristics of cells
Made of cells Grow and develop Reproduce after own kind Respond to stimulus in environment Use energy
Classification of cell
Level 1 cells. Lowest
Level 2 tissues
Level 3 organs
Level 4 systems.highest
Animal cells
- all cells are filled with tiny structures called organelles which perform jobs inside the cell
- a cell is much like a city
Nucleus
The largest organelle in the cell which is like The cells control center
Contains all DNA genetic material to give directions to make proteins for repair and making new cells or cell parts
The nucleus has its own membrane around it called the nuclear membrane
Nuclear pore
Protein in the nuclear membrane which allows certain things to enter the nucleus
Chromosome
Bundle of DNA in the nucleus
Mitochondria
Responsible for producing and releasing energy for the cell to use
Glucose
Energy for cells
Endoplasmic reticulum
A system of passageway that allows materials to transport from one part of the cell to another
There are two types of ER
Rough and smooth
Organism
A complete living thing
Lifespan
Birth growth reproduction and death of any organism
Environment
Where an organism lives habitat
Energy
The ability to do work
Cell
The smallest unit of life building block of all organisms filled with organelles contains DNA
cell theory
Cells always come from pre-existing cells all organisms are made of cells cells are the smallest unit of life
Unicellular
Made of one cell
Multicellular
Made of many cells
tissue
Composed of cells and having a specific function
Organ
Composed of tissues and having a specific function a group of tissues
