The sodium-potassium pump helps to maintain electrolyte gradients through use of ATP. Which of the following best describes this type of transport? a. osmosis b. passive transport c. diffusion d. active transport

Aquaporins are transmembrane proteins thatpromotea. pinocytosis.b. carrier-mediated transport.c. active transport.d. facilitated diffusion.e. osmosis

You find a membrane protein that moves molecules across a membrane. What type of transport could that protein be involved in?

_______ is the net movement of substances from a high concentration to a low concentration medium, whereas the _______ is the net movement of water across a membrane. a. Diffusion- ultrafiltration b. Dialysis-osmosis c. Diffusion-osmosis d. Osmosis-diffusion

Which of the following scenarios would result in the SLOWEST rate of diffusion? A. 1 molecule on the outside of a cell membrane, while 10 molecules are inside B. 8 molecules on the outside of a cell membrane, while 5 molecules are inside C. 12 molecules on the outside of a cell membrane, while 2 molecules are inside D. 20 molecules on the outside of a cell membrane, while 10 molecules are inside

Choose the processes from the list below which require active transport  A. Water moving through the membrane  B. Sodium moving out of a cell C. Potassium moving into a cell  D. Endocytosis  E. Oxygen moving from inhaled air into blood stream.

Cells in a hypertonic solution tend to: a. shrink due to water loss b. swell due to water gain c. stay the same size due to water moving into and out of the cell at the same rate d. none of the above