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HOMEOSTASIS REVIEW SHEET
Fill in the Blank Write the correct word(s) in the space(s) provided
Homeostasis
Cell membrane
Name:______________________________
Date:__________________ Period:_______
1. The ability of a cell to keep conditions within its internal environment consistent even though conditions in its
external environment change is called -?2. What structure allows a cell to limit what enters and leaves the cell?
The cell membrane is made of two layers/chains of -?- and is often called a -?- membrane.
Lipids
3.
Bilipid
4.
Permeable
5. Because cell membranes allow things to pass in and out of the cell, they are called -?-
Semipermeable
6. If a cell membrane allows small molecules to pass in and out of the cell but not large , it is called -?-
Selectively Permeable
7. A cell membrane that is choosy or particular about what passes through it is -?-
Concentration
8. The number of molecules of a substance in a given area is called -?-
Crowded
9. Another word for concentrated is -?-
Diffusion
10. The movement of molecules from an area of high concentration to an area of low concentration is called -?-
Passive Transport
11. When a cell does not have to use energy to either bring in or send out materials through the cell membrane, it
is called -?- transport.
Name three types of passive transport:
Diffusion
12.
Osmosis
13.
Facilitated Diffusion
14.
Osmosis
15. Diffusion of water through a membrane is called -?-
Facilitated Diffusion
16. The assisted diffusion of larger molecules through a cell membrane with in a way that does not require energy
from the cell is called -?- diffusion.
Active Transport
17. When a cell must use energy to either bring in or send out materials through the cell membrane, it is called -?transport.
Name four types of active transport:
Endocytosis
18.
Exocytosis
19.
Phagocytosis
20.
Resisting Diffusion
21.
Endocytosis
22. The active transport of materials into the cell through the cell membrane is called -?-
Vacuoles
23. Where are materials that are brought into the cell stored?
Exocytosis
24. The active transport of materials out of the cell through the cell membrane is called -?-
Wastes
25. What is usually emptied during exocytosis?
How? Cell membrane rips open the vacuole and forces the wastes out of the cell
Phagocytosis
26. What is the endocytosis of large food molecules called?
Solution
27. When one substance dissolves into another, a -?- is formed.
Solute
28. The substance in a solution that is being dissolved is called the -?-
Solvent
29. The substance in a solution that does the dissolving is called the -?-
Water
30. The universal solvent is -?-
Tonicity
31. The comparison of concentrations of two solutions’ concentrations is called -?-
Where are the 2 solutions that are being compared when determining tonicity with regards to a living cell?
Inside the cell
32.
Outside the cell
33.
Hypertonic
Hypotonic
Isotonic
Swells/Expands
34. If the solution that surrounds a cell has a higher concentration of dissolved solute than the cell has within its
cell membrane, the outside solution is said to be -?35. If the solution that surrounds a cell has a lower concentration of dissolved solute than the cell has within its
cell membrane, the outside solution is said to be -?36. If the solution that surrounds a cell has an equal concentration of dissolved solute as the cell has within its cell
membrane, both solutions are said to be -?37. What happens to a cell placed in a hypotonic solution?
38. How? Water will enter the cell
39. Why? Water moves towards the higher concentration inside the cell
Stays the same
40. What happens to a cell placed in an isotonic solution?
41. Why? Water will move in and out of the cell in equal proportions
Shrinks/Shrivels
42. What happens to a cell placed in a hypertonic solution?
43. How? Water will leave the cell
44. Why? Water moves towards the higher concentration outside the cell
What three things does a cell allow to pass through its membrane?
Nutrients
45.
Gases
46.
Waste Products
47.
What two gases do cells need to pass through their cell membranes?
Oxygen
48.
Carbon Dioxide
49.
Nutrients
50. The usable parts of food are grouped into six categories called -?-
Carbohydrates
51. What category of nutrient is used for quick, short-term energy?
Lipids
52. What category of nutrient is used for long-term energy and building membranes?
Proteins
53. What category of nutrient is used as building materials in the cell?
Water
54. What category of nutrient dissolves all the other nutrients and keeps the cell’s membranes wet?
Biomolecules
55. Molecules used to make structures within living things are called -?-
Carbon
56. Biomolecules contain what type of atoms as their structural backbone?
Why? Carbon can bond with many atoms at once and also can form long chains
Organic Compound
57. Any compound that uses carbon is called an -?- compound.
Macromolecules
58. Biomolecules are often large molecules called -?-
Name the four biomolecules:
Carbohydrates
59.
Lipids
60.
Proteins
61.
Nucleic Acids
62.
Amino Acids
63. Proteins are made of long chains of -?-
Proteins are used for -?- cell parts, -?- damage, fighting disease as -?-, and regulating the rate of chemical reactions as -?Building
64.
Repairing
65.
Antibodies
66.
Enzymes
67.
Nucleotides
68. What are nucleic acids composed of?
DNA and RNA
69. What are the two nucleic acids?
Digestion
70.The process of breaking down nutrients into simpler substances is called -?-
What three parts of a cell are most involved in digestion?
Vacuoles
71.
Cytosol
72.
Lysosomes
73.
Excretion
74. What is the process of getting rid of wastes?
Vacuoles
75. What organelles store the cell’s wastes until they are expelled out through the cell membrane?
 Study and know the movement through a cell membrane diagrams
 Study and know the tonicity diagrams