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WorksheetsPassive Active Transport
Total questions: 25
Worksheet time: 13mins
In what way is molecular transport similar to facilitated diffusion?
it requires an input of energy
it is used to move water in and out of cells
it involves proteins that act as channels or carriers
it moves materials against a concentration gradieint
Which of the following is not a type of passive transport?
diffusion
endocytosis
osmosis
dialysis
Which of the following is a type of active transport?
osmosis
diffusion
sodium-potassium pump
dialysis
Which of the following will affect the rate of diffusion?
steeper concentration gradients
increases in temperature
decrease in size of molecules
all of the answers are correct
Which of the following answer choices best describes the image above?
Passive transport; no energy input; facilitated diffusion; with the concentration gradient
Passive transport; no energy input; simple diffusion; with the concentration gradient
Active transport; energy input; facilitated diffusion; against the concentration gradient
Passive transport; energy input; simple diffusion; with the concentration gradient
Based on this image, which of the following statements is true?
The molecules will move from an area of low concentration to an area of high concentration without any energy input.
The molecules will move from an area of high concentration to an area of low concentration without any energy input.
The molecules will move from an area of high concentration to an area of low concentration due to an input of energy.
The molecules will move down the concentration gradient and once at equilibrium, will no longer move across the membrane.
Which of the following statements about passive transport is true?
Substances move along their concentration gradients.
Energy input is required.
Membrane proteins are always needed.
Passive transport refers only to the movement of water.
When a patient is admitted to the hospital and needs to be placed on intravenous (IV) fluids, its important that these fluids are at an isotonic (equal in concentration) concentration to their own body's fluids.
If the saline (salt) concentration of the body's fluids is 0.9
percent, what should be the concentration of IV saline solution administered to a patient?
0.9%
greater than 0.9%
less than 0.9%
Which way do particles move during active transport?
From areas of high concentration to areas of low concentration
From one area of low concentration to another area of low concentration
From one area of high concentration to another area of high concentration
From areas of low concentration to areas of high concentration
The rate of diffusion through a semipermeable membrane will be lowest when which of the following is (are) true?
I. Concentration gradients are steep
II. Temperatures are low
III. Solutes are small molecules
I only
II only
I and III only
II and III
I, II, and III
A concentration gradient ceases to exist when
all the molecules have moved from high to low
the membrane pores close
the temperature stops
there is no net movement
Movement of a molecule against a concentration gradient is
simple diffusion
facilitated diffusion
osmosis
active transport
Which of the following is an example of facilitated diffusion?
Sugar is transported into the cell via an energy-consuming process
Carbon dioxide exits the cell, passing directly through the cell membrane
Water moves out of the cell, passing through channel proteins in the cell membrane
Hydrogen ions are pumped out of the cell against their concentration gradient
In which direction do substances move during passive transport?
From top to bottom
From high to low concentration
From left to right
From low to high concentration
Which statement describes what is most likely to occur?
The atoms will be unable to cross the membrane.
The atoms will move from top to bottom.
The atoms will move from bottom to top.
There will be no net movement of atoms.
Which of the following statements about passive transport is not true?
it requires an input of energy
movement is with the concentration gradient
movement is from a high concentration to a lower concentration
includes osmosis, diffusion, dialysis, and facilitated diffusion
Crossing a membrane by simple diffusion can be distinguished from facilitated diffusion because:
Simple diffusion does not require energy: facilitated diffusion requires a source of ATP.
Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.
Simple diffusion is not saturable; facilitated diffusion rates are limited by the number of functional membrane proteins and can be saturated
Simple diffusion is found only in prokaryotes while facilitated diffusion is found only in eukaryotes.
The rate of transport of a substance into a cell is drastically reduced when the formation of ATP is blocked. The transport system must be a form of:
active transport
simple diffusion
facilitated diffusion
osmosis
Cell membrane components are synthesized in the endoplasmic reticulum, transported as vesicles to the Golgi apparatus where they are modified, and then are transported to the cell surface where they deliver their contents to the cells exterior and become a part of the cell membrane in a process called ____________. The reverse of this process, bringing nutrient containing particles from out side to the inside of the cell is called _________.
exocytosis; endocytosis
active transport; passive transport
simple diffusion; facilitated diffusion
osmosis; diffusion
Which of the following processes would be evident as glucose moves from a region of higher concentration through a semipermeable membrane to a region of lower concentration?
osmosis
simple diffusion
facilitated diffusion
dialysis
If a red blood cell is placed in an isotonic solution, water will move equally in both directions and the cell will remain in its original state.
True
False
If a red blood cell is placed in a hypertonic solution a net movement of water will occur out of the cell and the cell will shrink.
True
False
If a red blood cell is placed into a hypotonic solution there will be a net movement of water into the cell and the cell will burst.
True
False
If wilted celery is placed into a hypotonic solution, there will be a net movement of water into the cells of the celery. The increased osmotic pressure in the cells will cause the celery to become turgid due the pressure exerted on the cell walls.
True
False
Aquaporins are channels that allow water to move into a cell.
True
False
