Question

or active transport

correct answers	your responses
pumps ions across membrane from low to high concentration	active	active	(correct)
materials moving out of the cell	active	active	(correct)
cell eating, solid materials moving into the cell	active	active	(correct)
movement across membrane with help of channel protein	passive	passive	(correct)
movement of water through a semi-permeable membrane	passive	passive	(correct)
gas crossing across membranes from high to low	passive	passive	(correct)
materials moving into the cell	active	active	(correct)

1. passive or active transport (5 points)

☑ does not require energy \t\ta. passive
\t\t\t\t\t\tb. active
☑ movement from high to low concentration
☑ movement from low to high concentration
☑ does require energy
☑ uses atp

Explanation:

To solve this, we recall the definitions of passive and active transport:

• Passive transport: Does not require energy (ATP), moves substances from high to low concentration (down the concentration gradient), e.g., diffusion, osmosis, facilitated diffusion.
• Active transport: Requires energy (ATP), moves substances from low to high concentration (against the concentration gradient), e.g., ion pumps, endocytosis, exocytosis.

Now, let's analyze each option:

1. "does not require energy": This is a characteristic of passive transport (a).
2. "movement from high to low concentration": This is a characteristic of passive transport (a).
3. "movement from low to high concentration": This is a characteristic of active transport (b).
4. "does require energy": This is a characteristic of active transport (b).
5. "uses ATP": ATP is the energy source for active transport, so this is a characteristic of active transport (b).

Answer:

• "does not require energy": a. passive
• "movement from high to low concentration": a. passive
• "movement from low to high concentration": b. active
• "does require energy": b. active
• "uses ATP": b. active