Question

1. describe how the following types of active transport works. how does it work? what does it use to move things across the cell membrane? what type of things does it move across the cell membrane? draw a picture of it.

Explanation:

• Active Transport: Uses energy (ATP) to move substances against their concentration gradient. Membrane - bound proteins (carrier proteins) are used. It moves ions (e.g., Na⁺, K⁺) and small molecules. A simple drawing could show a cell membrane with a carrier protein and arrows indicating the movement of a substance from low to high concentration.
• Endocytosis: The cell membrane invaginates to form a vesicle that pinches off into the cell, engulfing substances. It uses the cell - membrane itself to form vesicles. It can move large molecules, particles, and even whole cells. A drawing could show a cell membrane curving inward to form a vesicle with an object inside.
• Exocytosis: A vesicle fuses with the cell membrane and releases its contents outside the cell. It also uses vesicles. It moves large molecules like proteins and waste products out of the cell. A drawing could show a vesicle fusing with the cell membrane and releasing its contents outside.

Answer:

	Active Transport	Endocytosis	Exocytosis
What does it use to move things across the cell membrane?	Carrier proteins and ATP	Cell - membrane to form vesicles	Vesicles
What type of things does it move across the cell membrane?	Ions and small molecules	Large molecules, particles, whole cells	Large molecules, waste products
Draw a picture of it.	A cell membrane with a carrier protein and a substance moving from low to high concentration	A cell membrane curving inward to form a vesicle with an object inside	A vesicle fusing with the cell membrane and releasing contents outside