chp 3 Activities

vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. This statement describes _____. simple diffusion exocytosis active transport endocytosis facilitated diffusion

Yes! You've got it! The term exocytosis literally means "out of the cell."

Some transport processes use transport proteins in the plasma membrane, but do not require ATP. This type of transport is known as _____. endocytosis simple diffusion exocytosis active transport facilitated diffusion

facilitated diffusion Yes! You've got it! Facilitated diffusion is a passive transport process during which molecules move down their concentration gradients through transport proteins

A primary active transport process is one in which __________. the plasma membrane folds inward to form a vesicle containing extracellular material an intracellular vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid molecules pass directly through the phospholipid bilayer of the plasma membrane molecules move across the plasma membrane without an input of energy molecules move through transport proteins that have been activated by ATP

molecules move through transport proteins that have been activated by ATP Yes! You've got it! Primary active transporters, such as the sodium-potassium ATPase (or pump), are activated when ATP is hydrolyzed. This activation allows for the transport of solutes across the plasma membrane against concentration gradients

The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. This statement describes _____. primary active transport secondary active transport simple diffusion facilitated diffusion exocytosis

primary active transport Yes! You've got it! The sodium-potassium pump is activated by ATP. This activation allows the pump to transport sodium and potassium ions against their gradients

WWater moves across plasma membranes by osmosis, a process that is most similar to ____ cotransport simple diffusion facilitated diffusion a process that requires energy from the cell active transport

simple diffusion Yes! You've got it!