Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Life Science: Ch1: Cells

Cells are too small to be seen without a ___ device. magnifying
The invention of the ___ in the 1600s changed people’s ideas about cells. microscope
___ can enlarge images up to 1,500 times. Light microscopes
___ microscopes can enlarge images 100,000 times or more. Electron
The ___ describes how cells relate to living things. cell theory
All ___ are made of one or more cells. organisms
The ___ is the smallest unit of life. cell
All new cells come from ___ cells. pre-existing
Scientists agree that all living things have common ___. characteristics
All cells are ___ with certain structures performing specialized functions. organized
Cells ___ to changes in the environment. respond
___ in many-celled organisms usually occurs as cell number increases. Growth
Organisms ___ and create offspring similar to themselves. reproduce
Organisms maintain their internal environment through ___. homeostasis
Cells use ___ to transport substances, make new cells, and perform chemical reactions. energy
Atoms and ___ are the building blocks of cells. molecules
___ has unique properties to help cells with homeostasis and substance transport. Water
Cells also contain such basic substances as ___, nucleic acids, lipids, and carbohydrates. proteins
Proteins are composed of folded chains of molecules called ___. amino acids
___ include DNA, which contains the cell’s genetic information, and RNA, which is used to make proteins. Nucleic acids
___ include fats, which store large amounts of chemical energy. Lipids
___, composed of sugar molecules, store energy for quick release. Carbohydrates
Cells have different shapes and sizes depending on their ___. function
Every cell has a flexible covering called a ___, which is selectively permeable. cell membrane
Plant, fungi, and some bacteria cells have a rigid ___ outside the cell membrane. cell wall
Appendages, such as tail-like ___ or short hairlike ___, help cells move. flagella, cilia
Inside a cell is the ___, a thick fluid in which cell structures are suspended. cytoplasm
Cells have a network of fibers in the cytoplasm called the ___. cytoskeleton
The cytoskeleton aids in ___ contraction, cell division, movement, and shape. muscle
Structures in the cell that have specific functions are called ___. organelles
The ___ is the control center of the cell. nucleus
The nucleus contains the cell’s ___ material in long chains of DNA. genetic
DNA chains are coiled into structures called ___. chromosomes
Inside the nucleus is the ___. It helps make structures that make proteins. nucleolus
The manufacture of ___ is an important function in cells. proteins
Proteins are built within ___, which can attach to the endoplasmic reticulum. ribosomes
Endoplasmic reticulum (ER) with ribosomes is called ___ and is important for making proteins. rough endoplasmic reticulum
Endoplasmic reticulum without ribosomes is called smooth ER and is important for making ___. lipids
Two kinds of ___ process the energy used by cells. organelles
Most of the cell’s energy is produced in the ___. mitochondria
Organisms that produce their own food manufacture it within ___. chloroplasts
The ___ processes, transports, and stores molecules. Golgi apparatus
___, which carry substances to the cell membrane for release, form from the Golgiapparatus Vesicles
Small ___ store food molecules, water, or waste products. vacuoles
An animal cell has a vacuole called the ___, which stores digestive enzymes. lysosome
A plant cell has a ___, which stores water and other molecules. central vacuole
Cells are classified as prokaryotic cells or ___ cells. eukaryotic
Cells without a nucleus or organelles are ___. prokaryotic
___ organisms, made up of one prokaryotic cell, were the only living things on bEarth for billions of years. Prokaryotic
A prokaryotic cell has a loop of ___ instead of chromosomes. DNA
Prokaryotes, also known as ___, can be harmful or beneficial to humans. bacteria
___ are essential for decomposition and can survive in extreme environments. Bacteria
Cells with a nucleus and other organelles are classified as ___. eukaryotic
Plants, animals, fungi, and protists all are made up of one or more ___ cells. eukaryotic
Many scientists suggest that eukaryotes evolved as a result of one ___ cell becoming part of another prokaryotic cell. prokaryotic
___ transforms stored energy in food molecules into usable energy in molecules called adenosine triphosphate (ATP). Cellular respiration
The first step in cellular respiration happens in the cytoplasm, where ___ breaks down a glucose molecule into two smaller molecules, releasing electrons glycolysis
The second and third steps of cellular respiration happen in the ___. mitochondria
In the second step of cellular respiration, the smaller molecules break down into ___, releasing more electrons. carbon dioxide
In the third step of cellular respiration, ___ is produced using the released electrons and water. ATP
Our muscle cells can release energy through ___ fermentation. lactic acid
Lactic acid fermentation takes place entirely in the ___. cytoplasm
Lactic acid fermentation uses glucose and produces ___ and carbon dioxide lactic acid
___ fermentation is used in the production of cheese and yogurt. Lactic acid
One-celled fungi called yeast use ___ to produce energy. alcohol fermentation
Alcohol fermentation uses glucose and produces ___ and carbon dioxide. ethanol
Alcohol fermentation produces fewer ___ molecules than cellular respiration. ATP
___ fermentation is used in baking bread. Alcohol
Some organisms use ___ to make food using a light source. photosynthesis
Light energy is absorbed by ___ and other pigments in the chloroplasts. chlorophyll
In photosynthesis, ___, water, and carbon dioxide are used to make sugar. light energy
___ is released into the atmosphere during photosynthesis. Oxygen
Most organisms use the sugars from ___, and photosynthesis supplies the oxygen we breathe. photosynthesis
Created by: jnosik