Question

1. 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

1. the plasma membrane (cell membrane) is made up of a(n)

cholesterol layer enzyme layer phospholipid bilayer protein layer

1. which of the following is not a form of passive transport?

facilitated diffusion diffusion endocytosis osmosis

1. diffusion continues until

equilibrium is reached turgor pressure is reached one side has more

1. if a cell is placed in salt water, water leaves the cell by

osmosis diffusion active transport phagocytosis

1. 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.

Explanation:

• Question 7: Passive transport does not require energy. Active transport requires energy. Facilitated diffusion is a type of passive transport. Osmosis is the diffusion of water (a passive process). So the answer is related to passive transport concepts.
• Question 8: The plasma membrane (cell membrane) is responsible for maintaining cell homeostasis. The cell wall provides structural support. Cytoplasm is the fluid inside the cell. Mitochondria are the power - houses of the cell.
• Question 9: The plasma membrane (cell membrane) is made up of a phospholipid bilayer. Cholesterol is embedded in the membrane for stability. Enzyme and protein layers are not the main structural components described in the basic membrane model.
• Question 10: Endocytosis is an active transport process (requires energy). Passive transport includes diffusion (movement from high to low concentration), facilitated diffusion (uses transport proteins), and osmosis (diffusion of water).
• Question 11: Diffusion continues until equilibrium is reached. Turgor pressure is related to plant cells and osmosis.
• Question 12: Osmosis is the diffusion of water. If a cell is placed in salt water (hypertonic solution), water leaves the cell by osmosis. Diffusion is a more general term for solute movement. Active transport and phagocytosis (a type of endocytosis) are not relevant here as it's water movement.
• Question 13: A cell moving particles from low to high concentration is active transport. Facilitated diffusion and osmosis are passive (move from high to low). Passive transport is the opposite of what's described.

Answer:

1. Passive transport
2. Plasma membrane
3. Phospholipid bilayer
4. Endocytosis
5. Equilibrium is reached
6. Osmosis
7. Active transport