Question

6.) pick whether each process below is an example of active transport or passive transport.
active transport passive transport
endocytosis
facilitated diffusion
osmosis
water moves from high to low concentrations
requires atp energy
molecules move from low to high concentration

Explanation:

• Endocytosis: It is a form of active transport. In endocytosis, the cell membrane engulfs materials (such as large molecules, particles, or even other cells) and forms vesicles. This process requires energy (in the form of ATP) as the cell has to actively change the shape of its membrane to internalize the substances.
• Facilitated Diffusion: This is a type of passive transport. Facilitated diffusion involves the movement of molecules (such as polar molecules or ions) across the cell membrane with the help of transport proteins (channel proteins or carrier proteins). The molecules move down their concentration gradient (from high to low concentration) and no energy input (like ATP) is required.
• Osmosis: Osmosis is a passive transport process. Osmosis is the movement of water molecules across a semi - permeable membrane from an area of higher water concentration (lower solute concentration) to an area of lower water concentration (higher solute concentration). This movement occurs spontaneously due to the concentration gradient and does not require energy.
• Water moves from HIGH to LOW concentrations: This is a description of passive transport. Whether it is simple diffusion (for non - polar molecules) or osmosis (for water), when a substance moves from an area of high concentration to an area of low concentration, it is following the concentration gradient and no energy is needed for this movement.
• Requires ATP energy: Processes that require ATP energy are active transport. ATP provides the energy for the cell to move substances against their concentration gradient (from low to high concentration) or for processes like endocytosis and exocytosis.
• Molecules move from LOW to HIGH concentration: This is a characteristic of active transport. Moving molecules against their concentration gradient (from low to high) requires energy input (usually in the form of ATP) because it is not a spontaneous process.

Answer:

• Endocytosis: Active Transport
• Facilitated Diffusion: Passive Transport
• Osmosis: Passive Transport
• Water moves from HIGH to LOW concentrations: Passive Transport
• Requires ATP energy: Active Transport
• Molecules move from LOW to HIGH concentration: Active Transport