Chapter 10 pre Flashcards
Carrier proteins can be involved in which of the following processes?
active transport
facilitated diffusion
Which of the following describes movement down a concentration gradient that takes place directly over the plasma membrane, without the aid of a channel or carrier protein?
simple diffusion
Which of the following processes involve movement down a concentration gradient (i.e., from an area of high concentration to an area of low concentration)?
simple diffusion
osmosis
facilitated diffusion
Which of the following processes require a membrane protein and energy?
active transport
What is another term for the diffusion of water?
osmosis
Plasma membranes allow some substances to enter and leave a cell, but prevent other substances from crossing the membrane; plasma membranes are therefore ________________________.
selectively permeable
A passive process of transport which requires no energy is called ________________.
diffusion
Which of the following describes a solution that has a higher solute concentration than a cell’s cytoplasm?
hypertonic solution
What is another term for a dissolved substance?
solute
Which of the following uses the energy of diffusion of a substance to bring another substance into the cell against its concentration gradient?
Secondary active transport
In the small intestine, glucose is moved against its concentration gradient into intestinal epithelial cells using sodium-glucose cotransporter proteins. The energy to move glucose against its gradient is supplied by the energy released by sodium ions diffusing down their gradient. This is an example of __________________________.
secondary active transport
The process of moving substances out of cell by means of a vesicle is called ___________________.
exocytosis
Which of the following processes involve vesicles that help transport substances across a membrane?
exocytosis
endocytosis
If a cell is placed in an hypotonic solution, what will happen?
the cell will swell and possibly burst as water enters the cell
If a cell is placed in an isotonic solution, what will happen?
water will move in and out of the cell, but there will be no net movement
Which of the following processes involve movement up a concentration gradient (i.e., from an area of low concentration to an area of high concentration)?
active transport
Which of the following processes require energy
bulk transport
active transport
Which of the following describes a solution that has a lower solute concentration than a cell’s cytoplasm?
hypotonic solution
A protein that binds a molecule on one side of the plasma membrane, changes shape, and moves the molecule to the other side of the membrane is called a(n) _____________________.
carrier protein
In the small intestine, glucose is moved against its concentration gradient into intestinal epithelial cells using sodium-glucose cotransporter proteins. The energy to move glucose against its gradient is supplied by the energy released by sodium ions diffusing down their gradient. This is an example of
secondary active transport
The process of bringing substances into a cell by means of a vesicle is called __________________.
endocytosis
If a cell is placed in an hypertonic solution, what will happen?
the cell will shrivel as water leaves the cell
When large particles are moved into the cell using a vesicle, this is called ______________.
endocytosis
____________ active trasport is directly moving a substance across a membrane from an area of lower concentration to an area of higher contration.
Primary
The sodium-potassium pump moves sodium ions out of the cell and potassium ions into the cell at the same time, using ATP. Each ion is moved against its gradient, from an area of lower concentration to an area of higher concentration. This is an example of ________________________.
primary active transport
