Question

1. passive or active transport

correct answers\tyour responses\t
uses atp\tactive\tactive\t(correct)
does require energy\tactive\tactive\t(correct)
does not require energy\tpassive\tpassive\t(correct)
movement from high to low concentration\tpassive\tpassive\t(correct)
movement from low to high concentration\tactive\tactive\t(correct)

1. passive or active transport (8 points)

☑️ cell drinking, liquid materials moving into the cell\ta. passive
\t\t\t\t\t\tb. 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

Answer:

To solve this, we analyze each option based on passive (no energy, high - low) and active (needs energy, low - high) transport:

1. cell drinking, liquid materials moving into the cell

• Explanation: Cell drinking (pinocytosis) is a type of endocytosis. Endocytosis is an active transport process as it requires the cell to use energy to bring in substances. So this should be active (option b). The initial check on the box for passive is incorrect.

2. materials moving out of the cell

• Explanation: Materials moving out of the cell can be either passive (e.g., simple diffusion, facilitated diffusion) or active (e.g., exocytosis). But if we consider processes like exocytosis (which is active) or passive transport like diffusion. However, a more accurate way: if it's a general "materials moving out", but if we think of processes like exocytosis (active) or passive diffusion. But in the context of the question, if we consider that moving materials out via exocytosis is active, but if it's simple diffusion (passive). But the initial check is wrong as it's not clear - cut, but let's correct based on proper concepts. If it's a process like exocytosis (active) or passive. But let's re - evaluate:
• If it's a general "materials moving out", but for the sake of correction: if it's a passive process (like diffusion of small molecules), it's passive, but if it's exocytosis (active). But the initial check is incorrect as the answer depends on the process. But let's assume the question is about the type: if it's a passive process (e.g., diffusion), it's passive, but if it's active (e.g., exocytosis). But the initial check is wrong. However, let's proceed with the correct classification:
• For the purpose of this problem, let's correct each:

3. movement of water through a semi - permeable membrane

• Explanation: The movement of water through a semi - permeable membrane is osmosis, which is a type of passive transport (no energy required, movement from high to low water potential). So this should be passive (option a). The initial check is correct.

4. pumps ions across membrane from low to high concentration

• Explanation: Ion pumps (like sodium - potassium pump) move ions from low to high concentration, which requires energy (ATP), so this is active transport (option b). The initial check is correct.

5. movement across membrane with help of channel protein

• Explanation: Movement across the membrane with the help of channel proteins (facilitated diffusion) is a type of passive transport (no energy required, movement from high to low concentration). So this should be passive (option a). The initial check is incorrect.

6. gas crossing across membranes from high to low

• Explanation: Gas crossing membranes from high to low concentration is simple diffusion, a passive transport process (no energy required). So this should be passive (option a). The initial check is correct.

7. materials moving into the cell

• Explanation: Materials moving into the cell can be passive (e.g., diffusion of small molecules) or active (e.g., endocytosis). But the initial check is incorrect as it's not specified. But if we consider processes like endocytosis (active) or passive diffusion. However, for the sake of correction, if it's a passive process (e.g., diffusion of oxygen), it's passive, but if it's endocytosis (active). But the initial check is wrong.

8. cell eating, solid materials moving into the cell

• Explanation: Cell eating (phagocytosis) is a type of endocytosis, which is an active transport process (requires energy). So this should be active (option b). The initial check is incorrect.

Correct Answers:

1. cell drinking, liquid materials moving into the cell: b. active
2. materials moving out of the cell: (Depends on the process, but if it's exocytosis - b. active; if diffusion - a. passive. But assuming the question expects correction based on common misclassifications, if it's a passive process like diffusion of small molecules, a. passive; if active like exocytosis, b. active. But the initial check is wrong)
3. movement of water through a semi - permeable membrane: a. passive (correct as initially checked)
4. pumps ions across membrane from low to high concentration: b. active (correct as initially checked)
5. movement across membrane with help of channel protein: a. passive (initial check wrong)
6. gas crossing across membranes from high to low: a. passive (correct as initially checked)
7. materials moving into the cell: (Depends, but if passive diffusion - a. passive; if endocytosis - b. active. Initial check wrong)
8. cell eating, solid materials moving into the cell: b. active (initial check wrong)