the cell membrane was completely permeable the concentration inside the cell would be same as Outside give reason

Active transport must function continuously because_______. a. plasma membranes wear out b. cells must be in constant motion c. facilitated transport opposes active transport d. diffusion is constantly moving the solutes in the other direction

The principal force driving movement in diffusion is______. a. temperature b. particle size c. concentration gradient d. membrane surface area

Solute contributes to the movement of water between cells and the surrounding medium by ________. osmotic pressure hydrostatic pressure Brownian movement random motion

Figure 3.22 A doctor injects a patient with what he thinks is isotonic saline solution. The patient dies, and autopsy reveals that many red blood cells have been destroyed. Do you think the solution the doctor injected was really isotonic?

Figure 5.12 A doctor injects a patient with what the doctor thinks is an isotonic saline solution. The patient dies, and an autopsy reveals that many red blood cells have been destroyed. Do you think the solution the doctor injected was really isotonic?

A transport protein requires ATP to pump sodium ions across a membrane. This is a case of ______. a. passive transport b. active transport c. facilitated diffusion d. a and c

Which of the following methods of transport is being used to transfer the substance into the cell in the accompanying graph? a. diffusion down a concentration gradient b. osmosis c. facilitated diffusion d. active transport e. vesicular transport f. It is impossible to tell with the information provided.

The principal force driving movement in diffusion is the. temperature particle size concentration gradient membrane surface area

Choose the answer that best completes the following analogy: Diffusion is to ________ as endocytosis is to ________. a. filtration; phagocytosis b. osmosis; pinocytosis c. solutes; fluid d. gradient; chemical energy