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Cells #3 -- Genoa

Cells Unit Part 3: diffusion, osmosis & mitosis

the chemical formula for _____ is H2O (numbers are subscipts) water
the chemical formula for _____ is CO2 (numbers are subscipts) carbon dioxide
the chemical formula for _____ gas is O2 (numbers are subscipts) oxygen
the symbol for the element oxygen is _____ O
the symbol for the element hydrogen is _____ H
the symbol for the element carbon is _____ C
Diffusion allows necessary _____ to enter cells. nutrients
The diffusion of water through a membrane. osmosis
Particles will automatically move across a cell membrane if they are _____ enough. small
Carbon dioxide is made of carbon and _____. oxygen
This molecule (made of O and H) is necessary for cell functions. water
Diffusion continues until the quantities/percentages are _____ on both sides of the membrane. equal
The movement of particles from regions of higher density to regions of lower density. diffusion
Diffusion allows _____ to exit cells. wastes
A waste gas of cellular respiration is _____ dioxide. carbon
During diffusion, particles move from areas of high concentration to areas of _____ concentration. low
Materials go in and out of an organism's cell(s) through its cell _____. membrane
This term describes a cell membrane meaning only certain substances can pass through (based on size). semipermeable
If a cell is 83% water and the environment on the outside is 90% water, will water diffuse _____ the cell. into
If a cell is 76% water, what is the total percentage of other materials (proteins, fats, etc.)? ___ % 24
Cell division in eukaryotic cells is called _____. mitosis
There are _____ phases of mitosis. four
The structures in the nucleus made of DNA are called _____. chromosomes
Cell A takes 6 hrs to divide. Cell B takes 8 hrs to divide. After 24 hrs, how many more copies of cell A would there be than cell B? eight
In this phase of mitosis, chromosomes line up in the middle along the equator. metaphase
In this phase of mitosis, the nuclear membrane dissolves and the chromosomes become more visible. prophase
In this phase of mitosis, chromosomes separate and move to opposite sides of the cell. anaphase
This is the resting phase of a cell. Chromosomes are copied when mitosis is about to occur. interphase
In this phase of mitosis, a nuclear membrane reforms around each set of chromosomes and the cytoplasm pinches inward. telophase
Human body cells have how many chromosomes? 46
How many chromosomes did you inherit from your mom? 23
How many chromosomes did you inherit from your dad? 23
One reason for mitosis is to allow multicellular organisms to _____ (get larger in size). grow
One reason for mitosis is to allow unicellular organisms to _____ (make more of their own kind). reproduce
One reason for mitosis is to allow multicellular organisms to replace old, worn-out _____ cells. dead
One reason for mitosis is to allow multicellular organisms to _____ injuries. repair
If one side of a semipermeable membrane has 13 water molecules and the other side has 27, how many will be on each side when diffusion has stopped? 20
How many steps are there in the cell cycle? 6
This is the final step of the cell cycle when the cytoplasm completely separates into 2 new cells. cytokinesis
If a cell is 90% water and the environment on the outside is 78% water, will water diffuse _____ the cell. out of
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