Question

1. how do materials move into a cell from the outside?

through intracellular receptors
through protein receptors located within the cell
through membrane receptors
through intercellular receptors

Explanation:

Membrane receptors are located on the cell membrane and can bind to specific molecules from outside the cell, facilitating the movement of materials into the cell. Intracellular receptors are inside the cell and mainly bind to molecules that can pass through the membrane. Protein receptors within the cell (intracellular) are not for bringing materials from outside. Intercellular receptors is not a standard term for this context.

Answer:

through membrane receptors