The illustration displays molecules outside of the semipermeable cell membrane.
Which image best represents the diffusion of material after reaching homeostasis?
Facilitated diffusion is accomplished using transport proteins. Transport proteins are channel or carrier proteins that are attached to the membrane and are specific to different molecules. The diagram shows carrier proteins that bind to the molecules and change their shape in order to move the molecules across the membrane into the cell's interior.
Which of the following best describes facilitated diffusion?
The sodium-potassium pump is a carrier protein found in the cell membrane of all animal cells. The diagram shows how the carrier proteins act as the pump that moves potassium ions into the cell and sodium ions out of the cell.
Why is this process considered active transport?
The diagram represents the movement of three different substances across a cell membrane.
Moving which of these substances across the cell membrane do not require energy from ATP?
A diagram of removing glucose from the blood by a fat cell is shown.
Which statement best describes the role of insulin and glucose-transport proteins in the process?
Many plants in the desert have limited access to nutrients. As a result, they have specialized cells called root hairs whose job is to take in as many nutrients as possible.
The diagram below shows a root hair cell using energy to take in as many organic nutrients (the orange molecules) as possible, even though there is already a high concentration inside the cell.
Based on the above information, specialized nutrient absorption is a form of in which molecules move .
