Question

1. passive or active transport (8 points)

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

Explanation:

To solve this, we analyze each statement based on passive (no energy, down concentration gradient) or active (energy, against gradient) transport:

1. cell drinking (pinocytosis), liquid into cell: Active (requires energy to engulf liquid), so b. active
2. pumps ions low to high concentration: Active (against gradient, needs energy), so b. active
3. materials moving out of cell: If via exocytosis (active) or passive (e.g., diffusion). But with other active examples here, likely active (exocytosis), so b. active
4. cell eating (phagocytosis), solid into cell: Active (energy to engulf solid), so b. active
5. movement with channel protein: Passive (facilitated diffusion, no energy), so a. passive
6. water through semi - permeable membrane (osmosis): Passive, so a. passive
7. gas crossing high to low (diffusion): Passive, so a. passive
8. materials moving into cell: If via endocytosis (active) or passive (e.g., diffusion). Given other active uptake (pinocytosis/phagocytosis), likely active, so b. active

Final Answers (matching each statement):

1. cell drinking, liquid materials moving into the cell: \(\boldsymbol{\text{b. active}}\)
2. pumps ions across membrane from low to high concentration: \(\boldsymbol{\text{b. active}}\)
3. materials moving out of the cell: \(\boldsymbol{\text{b. active}}\)
4. cell eating, solid materials moving into the cell: \(\boldsymbol{\text{b. active}}\)
5. movement across membrane with help of channel protein: \(\boldsymbol{\text{a. passive}}\)
6. movement of water through a semi - permeable membrane: \(\boldsymbol{\text{a. passive}}\)
7. gas crossing across membranes from high to low: \(\boldsymbol{\text{a. passive}}\)
8. materials moving into the cell: \(\boldsymbol{\text{b. active}}\)

Answer:

To solve this, we analyze each statement based on passive (no energy, down concentration gradient) or active (energy, against gradient) transport:

1. cell drinking (pinocytosis), liquid into cell: Active (requires energy to engulf liquid), so b. active
2. pumps ions low to high concentration: Active (against gradient, needs energy), so b. active
3. materials moving out of cell: If via exocytosis (active) or passive (e.g., diffusion). But with other active examples here, likely active (exocytosis), so b. active
4. cell eating (phagocytosis), solid into cell: Active (energy to engulf solid), so b. active
5. movement with channel protein: Passive (facilitated diffusion, no energy), so a. passive
6. water through semi - permeable membrane (osmosis): Passive, so a. passive
7. gas crossing high to low (diffusion): Passive, so a. passive
8. materials moving into cell: If via endocytosis (active) or passive (e.g., diffusion). Given other active uptake (pinocytosis/phagocytosis), likely active, so b. active

Final Answers (matching each statement):

1. cell drinking, liquid materials moving into the cell: \(\boldsymbol{\text{b. active}}\)
2. pumps ions across membrane from low to high concentration: \(\boldsymbol{\text{b. active}}\)
3. materials moving out of the cell: \(\boldsymbol{\text{b. active}}\)
4. cell eating, solid materials moving into the cell: \(\boldsymbol{\text{b. active}}\)
5. movement across membrane with help of channel protein: \(\boldsymbol{\text{a. passive}}\)
6. movement of water through a semi - permeable membrane: \(\boldsymbol{\text{a. passive}}\)
7. gas crossing across membranes from high to low: \(\boldsymbol{\text{a. passive}}\)
8. materials moving into the cell: \(\boldsymbol{\text{b. active}}\)