Lab Quiz

Cell Transport Mechanisms and Permeability Lab Quiz

This activity contains 20 questions.

	Differential permeability can also be described as:   the allowance of all substances to pass through a membrane without hindrance. the allowance of only certain substances to pass through a membrane without hindrance. a membrane's ability to keep nutrients outside of the cell. a membrane's ability to keep wastes inside the cell.

	Passive transport includes which of the following processes?   Osmosis Bulk-phase endocytosis Phagocytosis Pinocytosis

	Refer to Activity 1: Simulating Dialysis (Simple Diffusion). Which of the following passed through the 20 MWCO membrane?   Water Albumin Na+ Glucose Na+ and water

	Refer to Activity 1. Which solute(s) passed through the 100 MWCO membrane?   Glucose Glucose and sodium Albumin Na+ and urea

	Refer to Activity 1. Which solute demonstrated the highest diffusion rate through the 100 MWCO?   The Na+ and urea diffused at the same rate. Na+ Glucose Albumin All substances diffused at the same rate. Urea

	Refer to Activity 2: Simulating Facilitated Diffusion. Which solute(s) were able to travel against their concentration gradients?   Urea None could travel against their concentration gradient. Glucose Na+ Albumin

	Refer to Activity 2. One way that the rate of glucose transport could be increased is:   Increase the volume of water Increase the concentration of glucose Decrease the concentration of the other solutes Decrease the MWCO of the membrane Decrease the number of glucose carriers

	Refer to Activity 2. Which of the other solutes affected the rate of glucose diffusion?   Urea None of the solutes affected the diffusion rate of glucose. Na+ Albumin

	Refer to Activity 3: Simulating Osmotic Pressure. Under which type of transport process is osmosis included?   Pinocytosis Bulk-phase endocytosis Carrier-mediated transport Facilitated diffusion Simple diffusion

	Refer to Activity 3. Which of the membranes excluded water movement through the membrane?   50 MWCO 20 MWCO 100 MWCO None of the membranes affected water transport. 200 MWCO

	Refer to Activity 3. When solute concentration is __________, then osmotic pressure is __________.   increased, remains the same decreased, decreased decreased, increased increased, increased increased, decreased

	Refer to Activity 4: Simulating Filtration. The simulated filtration membrane is representative of the filtration membrane of what structure in humans?   Collecting tubules Proximal convoluted tubule Renal corpuscle Küpffer cells Loop of Henle Distal convoluted tubule

	Refer to Activity 4. What characteristic of a solute determines whether or not it passes through a filtration membrane?   pH of the solute Lipid solubility Molecular size Molecular charge Presence of carrier molecules

	Refer to Activity 5: Simulating Active Transport. Which carrier proteins affect Na+ transport?   Glucose Albumin None of the carrier proteins included in this active transport simulation affected Na+ transport. Urea

	Refer to Activity 5. The ratio of Na+ to K+ transport is ____ Na+ transported out of the cell for every ____ K+ transported into the cell.   2, 4 2, 1 3, 2 4, 1 2, 3

	What characteristic(s) of the semipermeable membrane used in the simple diffusion and filtration experiments determines which substances pass through them?   Molecular weight Presence of ATP Presence of carriers Lipid solubility All the characteristics are equally important

	The left beaker contains 4 mM NaCl, 9 mM glucose and 10 mM albumin. The right beaker contains 10 mM NaCl, 10 mM glucose and 40 mM albumin. The dialysis membrane is permeable to all substances except albumin. In which direction will glucose move?   To the right beaker To the left beaker To both beakers The glucose will not move.

	The left beaker contains 4 mM NaCl, 9 mM glucose and 10 mM albumin. The right beaker contains 10 mM NaCl, 10 mM glucose and 40 mM albumin. The dialysis membrane is permeable to all substances except albumin. In which direction will water move?   To the right beaker To the left beaker To both beakers Will not move

	When food is pickled for human consumption, as much water as possible is removed from the food. What method is used to achieve this dehydrating effect?   Facilitated diffusion Simple diffusion Pinocytosis Osmosis Bulk-phase endocytosis

	What determines whether a transport process is passive or active?   The cell type Presence of ATP Concentration gradients Membrane permeability pH

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