Question

glucose enters some cells by binding to a protein carrier in the cell membrane, which then changes shape and allows glucose to pass through. this process does not require energy. this is an example of: osmosis. active transport. facilitated diffusion (a type of passive transport). simple diffusion. during passive transport, substances move across the cell membrane because of: the random movement of molecules and the concentration gradient. the expenditure of cellular energy. the action of specific protein pumps. changes in the electrical charge across the membrane.

Explanation:

1. For the first question, facilitated diffusion is a type of passive - transport where molecules like glucose bind to a protein carrier in the cell membrane, which changes shape to allow the molecule to pass through without energy expenditure. Osmosis is the movement of water, active transport requires energy, and simple diffusion does not involve a carrier protein.
2. For the second question, passive transport occurs due to the random movement of molecules (Brownian motion) and the concentration gradient, from an area of high concentration to an area of low concentration, without the use of cellular energy or specific protein pumps for active - transport, and not due to changes in electrical charge for passive transport in general.

Answer:

1. C. Facilitated diffusion (a type of passive transport)
2. A. The random movement of molecules and the concentration gradient