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Cells Study Guide
Cell Theory
1. What are the 3 parts of the Cell Theory?
a. All living things are composed of cells
b. Cells are the basic unit of structure and function in living things
c. All cells come from pre-existing cells
Cell Membrane
2. The cell membrane is
pass in and out
Selectively
permeable, which means
3. What types of things flow into and out of the cell through the membrane?
nutrients
Only certain things can
Messengers, waste,
4. The cell membrane is mainly made of what type of macromolecule? Lipids
5. Its structure is a phospholipid
bilayer
.
6. What type of macromolecule helps the cell membrane with transporting information? Proteins
Diffusion
7. What does concentration mean? the number of molecules of a substance in a given volume
1. Molecules move from High
2. Diffusion
concentration to
Requires no energy
3. Diffusion is a type of Passive
4. What is the goal of diffusion?
Low
concentration.
energy.
transport.
Equilibrium
Osmosis
4. Osmosis is a type of diffusion, but only for
Water
.
8. What is osmotic pressure?
The force exerted by water
5. In a hypotonic solution, the water will move Into
the cell.
6. How do you remember “hypotonic”?
7. In a hypertonic solution, the water will move Out of
the cell.
8. How do you remember “hypertonic”?
9. What is the word for when the solution around the cell has the same number of water molecules as
inside the cell?
Isotonic
Match the parts of the city to the organelles that they would represent. (Its representing a PLANT cell).
Laborers: endoplasmic reticulum
Water tower: Vacuole
Street cleaners: Lysosome
Nuclear power plant: Mitochondria
Post office: Golgi Apparatus
Solar energy plant: Chloroplast
Town hall: Nucleus
Factory: Ribosomes
City boundaries: Cell Membrane
Wall of impenetrability: Cell Wall
Types of Active Transport:
Pumps: Uses energy, Pumps from low concentration to high concentration
Endocytosis: Molecules being engulfed into the cell
Exocytosis: Molecules being released from the cell
Phagocytosis: Consumption of large molecules (eating)
Pinocytosis: Consumption of smaller molecules (Liquids, drinking)
Difference between active and passive transport
Active: Requires energy, low to high concentration
Passive: Requires no energy, high to low concentration
Is the solution in the beaker hypotonic or hypertonic or isotonic? Where is the water moving in terms
of the cell? Identify in each beaker