Question

1. passive or active transport (8 points)

☑ cell drinking, liquid materials moving into the cell a. passive
b. active
☑ materials moving out of the cell
☑ movement of water through a semi - permeable membrane
☑ pumps ions across membrane from low to high concentration
☑ movement across membrane with help of channel protein
☑ gas crossing across membranes from high to low
☑ materials moving into the cell
☑ cell eating, solid materials moving into the cell

Explanation:

To solve this, we analyze each process:

1. Cell drinking (pinocytosis): Requires energy (active transport) → b. active
2. Materials moving out (e.g., exocytosis): Requires energy → b. active
3. Water movement (osmosis): Passive (no energy) → a. passive
4. Ion pumps (low to high conc.): Active (needs energy) → b. active
5. Channel protein (e.g., facilitated diffusion): Passive (no energy, uses channel) → a. passive
6. Gas crossing (diffusion): Passive (high to low, no energy) → a. passive
7. Materials moving in (e.g., endocytosis): Active (needs energy) → b. active
8. Cell eating (phagocytosis): Active (needs energy) → b. active

Answer:

s:

• cell drinking, liquid materials moving into the cell: b. active
• materials moving out of the cell: b. active
• movement of water through a semi - permeable membrane: a. passive
• pumps ions across membrane from low to high concentration: b. active
• movement across membrane with help of channel protein: a. passive
• gas crossing across membranes from high to low: a. passive
• materials moving into the cell: b. active
• cell eating, solid materials moving into the cell: b. active