Shared Flashcard Set

Details

CA Life Science
Chapter 3; Cell Structure and Function
32
Science
7th Grade
12/04/2012

Additional Science Flashcards

 


 

Cards

Term
Unicellular
Definition
single-celled organisms includes bacteria
Term
Multicellular
Definition
organisms are composed of many cells
Term
Organ
Definition
Is made up of different kinds of tissues that work together, such as your brain.
Term
Tissue
Definition
Is a group of similar cells that work together to perform a specific function.
Term
Cell Theory
Definition
A widely accepted explanation of the relationship between cells and living things.
Term
Organ System
Definition
A group of organs that work together to perform a major function, such as the nervous system.
Term
Organelles
Definition
Carry out specific functions within the cell.
Term
Cell Wall
Definition
Is a rigid layer of nonliving material that surrounds the cells of plat and some other organisms. Protects and support cell.
Term
Cytoskeleton
Definition
Framework, give the cells their shape.
Term
Nucleus
Definition
The cells control center, directing all of the cell's activity.
Term
Mitochondria
Definition
Rod shaped structures, organelles, power house converting energy in food molecules to energy the cell can use.
Term
Endoplasmic Reticulum
Definition
Maze of pathways. Part of cytoplasm forming protein and other materials. Also carry materials through the cell.
Term
Ribosomes
Definition
Attached to surface of endoplasmic reticulum. Producing protein.
Term
Golgi Bodies
Definition
Flatten sacks and tubes working as mail room. Package and distribute materials.
Term
Chloroplasts
Definition
Only plants have these. They capture light and use it to produce food.
Term
Vacuole
Definition
Water filled sack floating in cytoplasm. Works as storage area for cells.
Term
Lysosomes
Definition
Small round structures containing chemicals that breakdown certain materials in the cell.
Term
Cell Diversity
Definition
The variety of structure in cells reflects differnces in cell function.
Term
Elements
Definition
An element is any substance that cannot be broken down into simpler substances.
Term
Compound
Definition
When two or more elements combine chemically they form a compound
Term
Carbohydrate
Definition
In addition to providing energy for the cell, carbohydrates are important components of some cell parts.
Term
Lipids
Definition
In addition to their function s an energy source lipids also make up most of the cell membrane.
Term
Protein
Definition
Large organic molecules made of carbon hydrogen, oxygen, nitrogen and in some cases, sulfur.
Term
Amino Acids
Definition
Protein molecules are made up of smaller molecules.
Term
Emzyme
Definition
The proteins known as enzymes perform important functions in the chemical reactions that take place in cells.
Term
Nucleic Acids
Definition
Nucleic acids contain the instructions that cells need to carry out all the functions of life.
Term
RNA (Ribonucleic Acid)
Definition
Plays an important role in the production of proteins. I also found in the cytoplasm as well as the nucleus
Term
Selectively Permeable
Definition
Means that some substance can pass through the membrane while others cannot.
Term
Diffusion
Definition
I the main method by which small molicules move across the cell membrane.
Term
Osmosis
Definition
Because cells cannot function properly without adequate water, many cellular processes depend on osmosis.
Term
Passive Transport
Definition
The movement of dissolved materials through a cell membrane without using cellular energy.
Term
Active Transport
Definition
Active transport requires the cell to use its own energy, while passive transport does not.
Supporting users have an ad free experience!