Flashcards in Exp 1: Cell Transport Mechanisms Deck (80)
Three examples of passive transport mechanisms are [_______________], [______], and [________________].
A cell is immersed in a beaker of solution. The cell membrane is permeable to water but impermeable to solutes. If the intracellular concentration is 10 mM and the solution is 20 mM, which of the following is true?
The cell will shrink.
Activity 1: In this activity, the solutes were transported through the dialysis membrane by _______.
Refer to Activity 1: Simulating Dialysis (Simple Diffusion). Which of the following passed through the 20 MWCO membrane?
Refer to Activity 1: Simulating Dialysis (Simple Diffusion). Which of the following passed through the 100 MWCO membrane?
Activity 2: What is the type of transport supplied by the glucose carriers in the activity?
Refer to Activity 2: Simulated Facilitated Diffusion. Which solute(s) were able to travel against their concentration gradients?
None were able to travel against the concentration gradient
Refer to Activity 2: One way that the rate of glucose transport could be increased is:
Increase the concentration of glucose
Activity 2: Which of the following would decrease the rate of facilitated diffusion?
Decreasing the number of carrier proteins
Refer to Activity 3: Simulating Osmotic Pressure- Under which type of transport process is osmosis included?
Refer to Activity 3: Which of the membranes excluded NaCl movement through the membrane?
Activity 3: With the experimental conditions set at the 200 MWCO membrane in place, 10 mM glucose and 9 mM albumin, which of the following is true?
The net movement of water is toward the albumin.
Activity 3: Which of the following generated osmotic pressure?
Sodium chloride, glucose and albumin generated osmotic pressure.
Refer to Activity 4: Simulating Filtration- What characteristic of a solute determines whether or not it passes through a filtration membrane?
Activity 4: Which solute did NOT appear in the filtrate using the 200 MWCO membrane?
Activity 4: Which of the following was NOT observed during this activity?
Increasing the rate of filtration increased the concentration of solutes in the filtrate.
Refer to Activity 5: Simulating Active Transport- The ratio of Na+ to K+ transport is ____ Na+ transported out of the cell for every ____ K+ transported into the cell.
Activity 5: What happened when sodium chloride was added as a solute in the left beaker?
There was no change in the transport rate of glucose.
Activity 5: Which of the following increased the rate of sodium-potassium transport?
Increasing the number of membrane pumps
What is the main difference between simple diffusion and facilitated diffusion?
Facilitated diffusion requires a carrier while simple diffusion does not.
What is the main difference between facilitated diffusion and active transport?
Active transport requires energy to move molecules against their concentration gradient, while facilitated diffusion move molecules down their concentration gradient and does not require energy.
All processes of moving materials across the plasma membrane are classified as either:
Passive or active transport
Processes that move molecules passively across the cell membrane include:
The process of diffusion absolutely requires:
A concentration gradient.
Active transport and passive transport differ in that active transport requires:
Simple diffusion is defined as the movement of:
Molecules from areas of higher concentration to areas of lower concentration.
Ions and molecules in solution are in a state of constant random motion and collision (Brownian motion). This concept allows us to explain how a lump of sugar dissolves and eventually sugar molecules are found evenly distributed throughout a given container. This is a description of the process of:
The rate of diffusion is affected by which of the following?
True or False: Facilitated diffusion requires energy in the form of ATP.