Question

match the definition on the left with the term on the right.

1. _____ large wastes or cell products are released from inside to outside a cell
2. _____ diffusion of water molecules through a selectively permeable membrane.
3. _____ the transport of particles which requires the use of energy
4. _____ a state reached when particles continue to move but in equal amounts in and out of the cell.
5. _____ large particles are surrounded by the membrane and taken into the cell.
6. _____ movement of any particles from an area of higher concentration to one of lower concentration, with the concentration gradient.
7. _____ the transport of particles which does not require energy

circle the word or phrase that best completes the statement or answers the question.

1. the structure most responsible for maintaining cell homeostasis is the cytoplasm cell wall mitochondria plasma membrane
2. the plasma membrane (cell membrane) is made up of a(n) cholesterol layer enzyme layer phospholipid bilayer protein layer
3. which of the following is not a form of passive transport? facilitated diffusion diffusion endocytosis osmosis
4. diffusion continues until equilibrium is reached turgor pressure is reached one side has more
5. if a cell is placed in salt water, water leaves the cell by osmosis diffusion active transport phagocytosis
6. a cell moves particles from a region of low concentration to a region of high concentration by facilitated diffusion osmosis passive transport active transport

for each scenario, answer the questions and draw an arrow to illustrate the movement of molecules.

1. easter egg coloring:

a blue food coloring tablet is placed in a cup of vinegar and water. after several seconds, the blue tablet will begin to dissolve and will eventually spread evenly throughout the liquid.
beaker
water and vinegar
blue food color tablet
a. the blue dye is traveling from a ______ to a ______ concentrat
b. identify the type of transport illustrated in this scenario:
c. does this movement of particles require energy?

Explanation:

1. Exocytosis is the process where large wastes or cell products are released from inside to outside a cell.
2. Osmosis is specifically the diffusion of water molecules through a selectively permeable membrane.
3. Active transport is the transport of particles which requires the use of energy.
4. Dynamic equilibrium is a state reached when particles continue to move but in equal amounts in and out of the cell.
5. Endocytosis is when large particles are surrounded by the membrane and taken into the cell.
6. Diffusion is the movement of any particles from an area of higher concentration to one of lower concentration, with the concentration gradient.
7. Passive transport is the transport of particles which does not require energy.
8. The plasma membrane is most responsible for maintaining cell homeostasis as it regulates what enters and leaves the cell.
9. The plasma membrane is made up of a phospholipid bilayer.
10. Endocytosis is an active transport process (requires energy), while facilitated diffusion, diffusion, and osmosis are passive transport.
11. Diffusion continues until equilibrium is reached (equal concentration on both sides).
12. When a cell is placed in salt water (hypertonic solution), water leaves the cell by osmosis (water moves from higher water concentration inside the cell to lower water concentration outside).
13. Moving particles from low to high concentration is active transport as it goes against the concentration gradient and requires energy.

14.

• a. The blue dye is traveling from a higher to a lower concentration (as it spreads out).
• b. This is diffusion (movement of dye particles from high to low concentration).
• c. No, diffusion (a type of passive transport) does not require energy.

Answer:

1. d. Exocytosis
2. e. Osmosis
3. f. Active transport
4. c. Dynamic equilibrium
5. g. Endocytosis
6. b. Diffusion
7. a. Passive transport
8. plasma membrane
9. phospholipid bilayer
10. endocytosis
11. equilibrium is reached
12. osmosis
13. active transport

14.

• a. higher; lower
• b. diffusion
• c. No