Question

1. identify each of the types of transport below as active or passive.

transport	active or passive?
facilitated diffusion
protein pump
osmosis
endo/exocytosis

1. identify the following as plant cell or animal cell, then state why:

two cell diagrams

1. label the diagram as isotonic, hypertonic, or hypotonic. describe how the water is moving in each diagram.

three diagrams with h₂o arrows

Explanation:

Question 5

Step1: Recall transport types

Passive transport (diffusion, facilitated diffusion, osmosis) moves substances down concentration gradients without energy. Active transport (protein pumps, endo/exocytosis) requires energy (ATP) to move substances against gradients.

Step2: Classify each transport

• Diffusion: Passive (moves down gradient, no energy).
• Facilitated Diffusion: Passive (uses proteins, still down gradient, no energy).
• Protein Pump: Active (uses ATP to move against gradient).
• Osmosis: Passive (water diffusion, down gradient, no energy).
• Endo/exocytosis: Active (uses energy to move large molecules/particles).

Step1: Identify cell structures

Plant cells have cell walls, chloroplasts, large central vacuoles. Animal cells lack these, have centrioles (not always visible).

Step2: Analyze left diagram

Left cell: Has cell wall (rigid outer layer), chloroplasts (oval organelles), large central vacuole → Plant cell.

Step3: Analyze right diagram

Right cell: No cell wall, irregular shape, no chloroplasts → Animal cell.

Step1: Recall tonicity definitions

• Hypertonic: External solution has higher solute concentration (water leaves cell).
• Hypotonic: External solution has lower solute concentration (water enters cell).
• Isotonic: Equal solute concentration (water moves equally in/out).

Step2: Analyze each diagram

• Left diagram: More water leaving cell (arrows out) → Hypertonic (cell loses water, shrinks).
• Middle diagram: More water entering cell (arrow in is larger) → Hypotonic (cell gains water, swells).
• Right diagram: Equal water movement (arrows in/out equal) → Isotonic (cell size stable).

Answer:

Transport	Active or Passive?
Facilitated Diffusion	Passive
Protein Pump	Active
Osmosis	Passive
Endo/exocytosis	Active

Question 6